前端 Js二维码生成

落日映苍穹つ 2024-03-23 17:35 92阅读 0赞

### 前端 JS二维码生成(亲测有效) ###

1.页面

<template>	
    	<view class='pages'>		 
    		<view class="title"> 扫描入场</view>		
    		
    		<view class="qr-box">
    			<canvas canvas-id="qrcode"   style="width: 600rpx;height: 600rpx;margin: 0 auto;"/>
    		</view>		
    			
    				
    	</view>		
    </template>
    
    <script>
    	import uQRCode from '../../api/uqrcode.js' //引入uqrcode.js
    	export default {
        
    		data() {
        
    			return {
        
    				
    			}
    		},
    		onLoad() {
        
    			this.qrFun("www.baidu.com")
    		},
    		methods: {
        	 
    			//**生成二维码**//
    			qrFun(text) {
         
    				uQRCode.make({
        
    					canvasId: 'qrcode',
    					componentInstance: this,
    					text: text,
    					size: 300,
    					margin: 0,
    					backgroundColor: '#ffffff',
    					foregroundColor: '#000000',
    					fileType: 'jpg',
    					errorCorrectLevel: uQRCode.errorCorrectLevel.H,
    					success: res => {
        }
    				})
    			}
    		}
    	}
    </script>
    
    <style lang="scss">	
    	.pages {
        
    		width: 98%;
    		margin: auto;  
    		.title{
        
    			font-size: 48rpx;text-align: center;font-weight: 600;margin: 50rpx;
    		}
    	}	
    	.qr-box {
        
    		width: 600rpx;
    		height: 660rpx;
    		margin: 0 auto;
    		margin-top: 20rpx;
    	}
    </style>

2.uqrcode.js

// uqrcode.js
    //---------------------------------------------------------------------
    // github https://github.com/Sansnn/uQRCode
    //---------------------------------------------------------------------
    
    let uQRCode = {
        };
    
    (function() {
        
    	//---------------------------------------------------------------------
    	// QRCode for JavaScript
    	//
    	// Copyright (c) 2009 Kazuhiko Arase
    	//
    	// URL: http://www.d-project.com/
    	//
    	// Licensed under the MIT license:
    	//   http://www.opensource.org/licenses/mit-license.php
    	//
    	// The word "QR Code" is registered trademark of 
    	// DENSO WAVE INCORPORATED
    	//   http://www.denso-wave.com/qrcode/faqpatent-e.html
    	//
    	//---------------------------------------------------------------------
    
    	//---------------------------------------------------------------------
    	// QR8bitByte
    	//---------------------------------------------------------------------
    
    	function QR8bitByte(data) {
        
    		this.mode = QRMode.MODE_8BIT_BYTE;
    		this.data = data;
    	}
    
    	QR8bitByte.prototype = {
        
    
    		getLength: function(buffer) {
        
    			return this.data.length;
    		},
    
    		write: function(buffer) {
        
    			for (var i = 0; i < this.data.length; i++) {
        
    				// not JIS ...
    				buffer.put(this.data.charCodeAt(i), 8);
    			}
    		}
    	};
    
    	//---------------------------------------------------------------------
    	// QRCode
    	//---------------------------------------------------------------------
    
    	function QRCode(typeNumber, errorCorrectLevel) {
        
    		this.typeNumber = typeNumber;
    		this.errorCorrectLevel = errorCorrectLevel;
    		this.modules = null;
    		this.moduleCount = 0;
    		this.dataCache = null;
    		this.dataList = new Array();
    	}
    
    	QRCode.prototype = {
        
    
    		addData: function(data) {
        
    			var newData = new QR8bitByte(data);
    			this.dataList.push(newData);
    			this.dataCache = null;
    		},
    
    		isDark: function(row, col) {
        
    			if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) {
        
    				throw new Error(row + "," + col);
    			}
    			return this.modules[row][col];
    		},
    
    		getModuleCount: function() {
        
    			return this.moduleCount;
    		},
    
    		make: function() {
        
    			// Calculate automatically typeNumber if provided is < 1
    			if (this.typeNumber < 1) {
        
    				var typeNumber = 1;
    				for (typeNumber = 1; typeNumber < 40; typeNumber++) {
        
    					var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, this.errorCorrectLevel);
    
    					var buffer = new QRBitBuffer();
    					var totalDataCount = 0;
    					for (var i = 0; i < rsBlocks.length; i++) {
        
    						totalDataCount += rsBlocks[i].dataCount;
    					}
    
    					for (var i = 0; i < this.dataList.length; i++) {
        
    						var data = this.dataList[i];
    						buffer.put(data.mode, 4);
    						buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber));
    						data.write(buffer);
    					}
    					if (buffer.getLengthInBits() <= totalDataCount * 8)
    						break;
    				}
    				this.typeNumber = typeNumber;
    			}
    			this.makeImpl(false, this.getBestMaskPattern());
    		},
    
    		makeImpl: function(test, maskPattern) {
        
    
    			this.moduleCount = this.typeNumber * 4 + 17;
    			this.modules = new Array(this.moduleCount);
    
    			for (var row = 0; row < this.moduleCount; row++) {
        
    
    				this.modules[row] = new Array(this.moduleCount);
    
    				for (var col = 0; col < this.moduleCount; col++) {
        
    					this.modules[row][col] = null; //(col + row) % 3;
    				}
    			}
    
    			this.setupPositionProbePattern(0, 0);
    			this.setupPositionProbePattern(this.moduleCount - 7, 0);
    			this.setupPositionProbePattern(0, this.moduleCount - 7);
    			this.setupPositionAdjustPattern();
    			this.setupTimingPattern();
    			this.setupTypeInfo(test, maskPattern);
    
    			if (this.typeNumber >= 7) {
        
    				this.setupTypeNumber(test);
    			}
    
    			if (this.dataCache == null) {
        
    				this.dataCache = QRCode.createData(this.typeNumber, this.errorCorrectLevel, this.dataList);
    			}
    
    			this.mapData(this.dataCache, maskPattern);
    		},
    
    		setupPositionProbePattern: function(row, col) {
        
    
    			for (var r = -1; r <= 7; r++) {
        
    
    				if (row + r <= -1 || this.moduleCount <= row + r) continue;
    
    				for (var c = -1; c <= 7; c++) {
        
    
    					if (col + c <= -1 || this.moduleCount <= col + c) continue;
    
    					if ((0 <= r && r <= 6 && (c == 0 || c == 6)) ||
    						(0 <= c && c <= 6 && (r == 0 || r == 6)) ||
    						(2 <= r && r <= 4 && 2 <= c && c <= 4)) {
        
    						this.modules[row + r][col + c] = true;
    					} else {
        
    						this.modules[row + r][col + c] = false;
    					}
    				}
    			}
    		},
    
    		getBestMaskPattern: function() {
        
    
    			var minLostPoint = 0;
    			var pattern = 0;
    
    			for (var i = 0; i < 8; i++) {
        
    
    				this.makeImpl(true, i);
    
    				var lostPoint = QRUtil.getLostPoint(this);
    
    				if (i == 0 || minLostPoint > lostPoint) {
        
    					minLostPoint = lostPoint;
    					pattern = i;
    				}
    			}
    
    			return pattern;
    		},
    
    		createMovieClip: function(target_mc, instance_name, depth) {
        
    
    			var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth);
    			var cs = 1;
    
    			this.make();
    
    			for (var row = 0; row < this.modules.length; row++) {
        
    
    				var y = row * cs;
    
    				for (var col = 0; col < this.modules[row].length; col++) {
        
    
    					var x = col * cs;
    					var dark = this.modules[row][col];
    
    					if (dark) {
        
    						qr_mc.beginFill(0, 100);
    						qr_mc.moveTo(x, y);
    						qr_mc.lineTo(x + cs, y);
    						qr_mc.lineTo(x + cs, y + cs);
    						qr_mc.lineTo(x, y + cs);
    						qr_mc.endFill();
    					}
    				}
    			}
    
    			return qr_mc;
    		},
    
    		setupTimingPattern: function() {
        
    
    			for (var r = 8; r < this.moduleCount - 8; r++) {
        
    				if (this.modules[r][6] != null) {
        
    					continue;
    				}
    				this.modules[r][6] = (r % 2 == 0);
    			}
    
    			for (var c = 8; c < this.moduleCount - 8; c++) {
        
    				if (this.modules[6][c] != null) {
        
    					continue;
    				}
    				this.modules[6][c] = (c % 2 == 0);
    			}
    		},
    
    		setupPositionAdjustPattern: function() {
        
    
    			var pos = QRUtil.getPatternPosition(this.typeNumber);
    
    			for (var i = 0; i < pos.length; i++) {
        
    
    				for (var j = 0; j < pos.length; j++) {
        
    
    					var row = pos[i];
    					var col = pos[j];
    
    					if (this.modules[row][col] != null) {
        
    						continue;
    					}
    
    					for (var r = -2; r <= 2; r++) {
        
    
    						for (var c = -2; c <= 2; c++) {
        
    
    							if (r == -2 || r == 2 || c == -2 || c == 2 ||
    								(r == 0 && c == 0)) {
        
    								this.modules[row + r][col + c] = true;
    							} else {
        
    								this.modules[row + r][col + c] = false;
    							}
    						}
    					}
    				}
    			}
    		},
    
    		setupTypeNumber: function(test) {
        
    
    			var bits = QRUtil.getBCHTypeNumber(this.typeNumber);
    
    			for (var i = 0; i < 18; i++) {
        
    				var mod = (!test && ((bits >> i) & 1) == 1);
    				this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
    			}
    
    			for (var i = 0; i < 18; i++) {
        
    				var mod = (!test && ((bits >> i) & 1) == 1);
    				this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
    			}
    		},
    
    		setupTypeInfo: function(test, maskPattern) {
        
    
    			var data = (this.errorCorrectLevel << 3) | maskPattern;
    			var bits = QRUtil.getBCHTypeInfo(data);
    
    			// vertical		
    			for (var i = 0; i < 15; i++) {
        
    
    				var mod = (!test && ((bits >> i) & 1) == 1);
    
    				if (i < 6) {
        
    					this.modules[i][8] = mod;
    				} else if (i < 8) {
        
    					this.modules[i + 1][8] = mod;
    				} else {
        
    					this.modules[this.moduleCount - 15 + i][8] = mod;
    				}
    			}
    
    			// horizontal
    			for (var i = 0; i < 15; i++) {
        
    
    				var mod = (!test && ((bits >> i) & 1) == 1);
    
    				if (i < 8) {
        
    					this.modules[8][this.moduleCount - i - 1] = mod;
    				} else if (i < 9) {
        
    					this.modules[8][15 - i - 1 + 1] = mod;
    				} else {
        
    					this.modules[8][15 - i - 1] = mod;
    				}
    			}
    
    			// fixed module
    			this.modules[this.moduleCount - 8][8] = (!test);
    
    		},
    
    		mapData: function(data, maskPattern) {
        
    
    			var inc = -1;
    			var row = this.moduleCount - 1;
    			var bitIndex = 7;
    			var byteIndex = 0;
    
    			for (var col = this.moduleCount - 1; col > 0; col -= 2) {
        
    
    				if (col == 6) col--;
    
    				while (true) {
        
    
    					for (var c = 0; c < 2; c++) {
        
    
    						if (this.modules[row][col - c] == null) {
        
    
    							var dark = false;
    
    							if (byteIndex < data.length) {
        
    								dark = (((data[byteIndex] >>> bitIndex) & 1) == 1);
    							}
    
    							var mask = QRUtil.getMask(maskPattern, row, col - c);
    
    							if (mask) {
        
    								dark = !dark;
    							}
    
    							this.modules[row][col - c] = dark;
    							bitIndex--;
    
    							if (bitIndex == -1) {
        
    								byteIndex++;
    								bitIndex = 7;
    							}
    						}
    					}
    
    					row += inc;
    
    					if (row < 0 || this.moduleCount <= row) {
        
    						row -= inc;
    						inc = -inc;
    						break;
    					}
    				}
    			}
    
    		}
    
    	};
    
    	QRCode.PAD0 = 0xEC;
    	QRCode.PAD1 = 0x11;
    
    	QRCode.createData = function(typeNumber, errorCorrectLevel, dataList) {
        
    
    		var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);
    
    		var buffer = new QRBitBuffer();
    
    		for (var i = 0; i < dataList.length; i++) {
        
    			var data = dataList[i];
    			buffer.put(data.mode, 4);
    			buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber));
    			data.write(buffer);
    		}
    
    		// calc num max data.
    		var totalDataCount = 0;
    		for (var i = 0; i < rsBlocks.length; i++) {
        
    			totalDataCount += rsBlocks[i].dataCount;
    		}
    
    		if (buffer.getLengthInBits() > totalDataCount * 8) {
        
    			throw new Error("code length overflow. (" +
    				buffer.getLengthInBits() +
    				">" +
    				totalDataCount * 8 +
    				")");
    		}
    
    		// end code
    		if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
        
    			buffer.put(0, 4);
    		}
    
    		// padding
    		while (buffer.getLengthInBits() % 8 != 0) {
        
    			buffer.putBit(false);
    		}
    
    		// padding
    		while (true) {
        
    
    			if (buffer.getLengthInBits() >= totalDataCount * 8) {
        
    				break;
    			}
    			buffer.put(QRCode.PAD0, 8);
    
    			if (buffer.getLengthInBits() >= totalDataCount * 8) {
        
    				break;
    			}
    			buffer.put(QRCode.PAD1, 8);
    		}
    
    		return QRCode.createBytes(buffer, rsBlocks);
    	}
    
    	QRCode.createBytes = function(buffer, rsBlocks) {
        
    
    		var offset = 0;
    
    		var maxDcCount = 0;
    		var maxEcCount = 0;
    
    		var dcdata = new Array(rsBlocks.length);
    		var ecdata = new Array(rsBlocks.length);
    
    		for (var r = 0; r < rsBlocks.length; r++) {
        
    
    			var dcCount = rsBlocks[r].dataCount;
    			var ecCount = rsBlocks[r].totalCount - dcCount;
    
    			maxDcCount = Math.max(maxDcCount, dcCount);
    			maxEcCount = Math.max(maxEcCount, ecCount);
    
    			dcdata[r] = new Array(dcCount);
    
    			for (var i = 0; i < dcdata[r].length; i++) {
        
    				dcdata[r][i] = 0xff & buffer.buffer[i + offset];
    			}
    			offset += dcCount;
    
    			var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
    			var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);
    
    			var modPoly = rawPoly.mod(rsPoly);
    			ecdata[r] = new Array(rsPoly.getLength() - 1);
    			for (var i = 0; i < ecdata[r].length; i++) {
        
    				var modIndex = i + modPoly.getLength() - ecdata[r].length;
    				ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0;
    			}
    
    		}
    
    		var totalCodeCount = 0;
    		for (var i = 0; i < rsBlocks.length; i++) {
        
    			totalCodeCount += rsBlocks[i].totalCount;
    		}
    
    		var data = new Array(totalCodeCount);
    		var index = 0;
    
    		for (var i = 0; i < maxDcCount; i++) {
        
    			for (var r = 0; r < rsBlocks.length; r++) {
        
    				if (i < dcdata[r].length) {
        
    					data[index++] = dcdata[r][i];
    				}
    			}
    		}
    
    		for (var i = 0; i < maxEcCount; i++) {
        
    			for (var r = 0; r < rsBlocks.length; r++) {
        
    				if (i < ecdata[r].length) {
        
    					data[index++] = ecdata[r][i];
    				}
    			}
    		}
    
    		return data;
    
    	}
    
    	//---------------------------------------------------------------------
    	// QRMode
    	//---------------------------------------------------------------------
    
    	var QRMode = {
        
    		MODE_NUMBER: 1 << 0,
    		MODE_ALPHA_NUM: 1 << 1,
    		MODE_8BIT_BYTE: 1 << 2,
    		MODE_KANJI: 1 << 3
    	};
    
    	//---------------------------------------------------------------------
    	// QRErrorCorrectLevel
    	//---------------------------------------------------------------------
    
    	var QRErrorCorrectLevel = {
        
    		L: 1,
    		M: 0,
    		Q: 3,
    		H: 2
    	};
    
    	//---------------------------------------------------------------------
    	// QRMaskPattern
    	//---------------------------------------------------------------------
    
    	var QRMaskPattern = {
        
    		PATTERN000: 0,
    		PATTERN001: 1,
    		PATTERN010: 2,
    		PATTERN011: 3,
    		PATTERN100: 4,
    		PATTERN101: 5,
    		PATTERN110: 6,
    		PATTERN111: 7
    	};
    
    	//---------------------------------------------------------------------
    	// QRUtil
    	//---------------------------------------------------------------------
    
    	var QRUtil = {
        
    
    		PATTERN_POSITION_TABLE: [
    			[],
    			[6, 18],
    			[6, 22],
    			[6, 26],
    			[6, 30],
    			[6, 34],
    			[6, 22, 38],
    			[6, 24, 42],
    			[6, 26, 46],
    			[6, 28, 50],
    			[6, 30, 54],
    			[6, 32, 58],
    			[6, 34, 62],
    			[6, 26, 46, 66],
    			[6, 26, 48, 70],
    			[6, 26, 50, 74],
    			[6, 30, 54, 78],
    			[6, 30, 56, 82],
    			[6, 30, 58, 86],
    			[6, 34, 62, 90],
    			[6, 28, 50, 72, 94],
    			[6, 26, 50, 74, 98],
    			[6, 30, 54, 78, 102],
    			[6, 28, 54, 80, 106],
    			[6, 32, 58, 84, 110],
    			[6, 30, 58, 86, 114],
    			[6, 34, 62, 90, 118],
    			[6, 26, 50, 74, 98, 122],
    			[6, 30, 54, 78, 102, 126],
    			[6, 26, 52, 78, 104, 130],
    			[6, 30, 56, 82, 108, 134],
    			[6, 34, 60, 86, 112, 138],
    			[6, 30, 58, 86, 114, 142],
    			[6, 34, 62, 90, 118, 146],
    			[6, 30, 54, 78, 102, 126, 150],
    			[6, 24, 50, 76, 102, 128, 154],
    			[6, 28, 54, 80, 106, 132, 158],
    			[6, 32, 58, 84, 110, 136, 162],
    			[6, 26, 54, 82, 110, 138, 166],
    			[6, 30, 58, 86, 114, 142, 170]
    		],
    
    		G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
    		G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
    		G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),
    
    		getBCHTypeInfo: function(data) {
        
    			var d = data << 10;
    			while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
        
    				d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15)));
    			}
    			return ((data << 10) | d) ^ QRUtil.G15_MASK;
    		},
    
    		getBCHTypeNumber: function(data) {
        
    			var d = data << 12;
    			while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
        
    				d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18)));
    			}
    			return (data << 12) | d;
    		},
    
    		getBCHDigit: function(data) {
        
    
    			var digit = 0;
    
    			while (data != 0) {
        
    				digit++;
    				data >>>= 1;
    			}
    
    			return digit;
    		},
    
    		getPatternPosition: function(typeNumber) {
        
    			return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
    		},
    
    		getMask: function(maskPattern, i, j) {
        
    
    			switch (maskPattern) {
        
    
    				case QRMaskPattern.PATTERN000:
    					return (i + j) % 2 == 0;
    				case QRMaskPattern.PATTERN001:
    					return i % 2 == 0;
    				case QRMaskPattern.PATTERN010:
    					return j % 3 == 0;
    				case QRMaskPattern.PATTERN011:
    					return (i + j) % 3 == 0;
    				case QRMaskPattern.PATTERN100:
    					return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
    				case QRMaskPattern.PATTERN101:
    					return (i * j) % 2 + (i * j) % 3 == 0;
    				case QRMaskPattern.PATTERN110:
    					return ((i * j) % 2 + (i * j) % 3) % 2 == 0;
    				case QRMaskPattern.PATTERN111:
    					return ((i * j) % 3 + (i + j) % 2) % 2 == 0;
    
    				default:
    					throw new Error("bad maskPattern:" + maskPattern);
    			}
    		},
    
    		getErrorCorrectPolynomial: function(errorCorrectLength) {
        
    
    			var a = new QRPolynomial([1], 0);
    
    			for (var i = 0; i < errorCorrectLength; i++) {
        
    				a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0));
    			}
    
    			return a;
    		},
    
    		getLengthInBits: function(mode, type) {
        
    
    			if (1 <= type && type < 10) {
        
    
    				// 1 - 9
    
    				switch (mode) {
        
    					case QRMode.MODE_NUMBER:
    						return 10;
    					case QRMode.MODE_ALPHA_NUM:
    						return 9;
    					case QRMode.MODE_8BIT_BYTE:
    						return 8;
    					case QRMode.MODE_KANJI:
    						return 8;
    					default:
    						throw new Error("mode:" + mode);
    				}
    
    			} else if (type < 27) {
        
    
    				// 10 - 26
    
    				switch (mode) {
        
    					case QRMode.MODE_NUMBER:
    						return 12;
    					case QRMode.MODE_ALPHA_NUM:
    						return 11;
    					case QRMode.MODE_8BIT_BYTE:
    						return 16;
    					case QRMode.MODE_KANJI:
    						return 10;
    					default:
    						throw new Error("mode:" + mode);
    				}
    
    			} else if (type < 41) {
        
    
    				// 27 - 40
    
    				switch (mode) {
        
    					case QRMode.MODE_NUMBER:
    						return 14;
    					case QRMode.MODE_ALPHA_NUM:
    						return 13;
    					case QRMode.MODE_8BIT_BYTE:
    						return 16;
    					case QRMode.MODE_KANJI:
    						return 12;
    					default:
    						throw new Error("mode:" + mode);
    				}
    
    			} else {
        
    				throw new Error("type:" + type);
    			}
    		},
    
    		getLostPoint: function(qrCode) {
        
    
    			var moduleCount = qrCode.getModuleCount();
    
    			var lostPoint = 0;
    
    			// LEVEL1
    
    			for (var row = 0; row < moduleCount; row++) {
        
    
    				for (var col = 0; col < moduleCount; col++) {
        
    
    					var sameCount = 0;
    					var dark = qrCode.isDark(row, col);
    
    					for (var r = -1; r <= 1; r++) {
        
    
    						if (row + r < 0 || moduleCount <= row + r) {
        
    							continue;
    						}
    
    						for (var c = -1; c <= 1; c++) {
        
    
    							if (col + c < 0 || moduleCount <= col + c) {
        
    								continue;
    							}
    
    							if (r == 0 && c == 0) {
        
    								continue;
    							}
    
    							if (dark == qrCode.isDark(row + r, col + c)) {
        
    								sameCount++;
    							}
    						}
    					}
    
    					if (sameCount > 5) {
        
    						lostPoint += (3 + sameCount - 5);
    					}
    				}
    			}
    
    			// LEVEL2
    
    			for (var row = 0; row < moduleCount - 1; row++) {
        
    				for (var col = 0; col < moduleCount - 1; col++) {
        
    					var count = 0;
    					if (qrCode.isDark(row, col)) count++;
    					if (qrCode.isDark(row + 1, col)) count++;
    					if (qrCode.isDark(row, col + 1)) count++;
    					if (qrCode.isDark(row + 1, col + 1)) count++;
    					if (count == 0 || count == 4) {
        
    						lostPoint += 3;
    					}
    				}
    			}
    
    			// LEVEL3
    
    			for (var row = 0; row < moduleCount; row++) {
        
    				for (var col = 0; col < moduleCount - 6; col++) {
        
    					if (qrCode.isDark(row, col) &&
    						!qrCode.isDark(row, col + 1) &&
    						qrCode.isDark(row, col + 2) &&
    						qrCode.isDark(row, col + 3) &&
    						qrCode.isDark(row, col + 4) &&
    						!qrCode.isDark(row, col + 5) &&
    						qrCode.isDark(row, col + 6)) {
        
    						lostPoint += 40;
    					}
    				}
    			}
    
    			for (var col = 0; col < moduleCount; col++) {
        
    				for (var row = 0; row < moduleCount - 6; row++) {
        
    					if (qrCode.isDark(row, col) &&
    						!qrCode.isDark(row + 1, col) &&
    						qrCode.isDark(row + 2, col) &&
    						qrCode.isDark(row + 3, col) &&
    						qrCode.isDark(row + 4, col) &&
    						!qrCode.isDark(row + 5, col) &&
    						qrCode.isDark(row + 6, col)) {
        
    						lostPoint += 40;
    					}
    				}
    			}
    
    			// LEVEL4
    
    			var darkCount = 0;
    
    			for (var col = 0; col < moduleCount; col++) {
        
    				for (var row = 0; row < moduleCount; row++) {
        
    					if (qrCode.isDark(row, col)) {
        
    						darkCount++;
    					}
    				}
    			}
    
    			var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
    			lostPoint += ratio * 10;
    
    			return lostPoint;
    		}
    
    	};
    
    
    	//---------------------------------------------------------------------
    	// QRMath
    	//---------------------------------------------------------------------
    
    	var QRMath = {
        
    
    		glog: function(n) {
        
    
    			if (n < 1) {
        
    				throw new Error("glog(" + n + ")");
    			}
    
    			return QRMath.LOG_TABLE[n];
    		},
    
    		gexp: function(n) {
        
    
    			while (n < 0) {
        
    				n += 255;
    			}
    
    			while (n >= 256) {
        
    				n -= 255;
    			}
    
    			return QRMath.EXP_TABLE[n];
    		},
    
    		EXP_TABLE: new Array(256),
    
    		LOG_TABLE: new Array(256)
    
    	};
    
    	for (var i = 0; i < 8; i++) {
        
    		QRMath.EXP_TABLE[i] = 1 << i;
    	}
    	for (var i = 8; i < 256; i++) {
        
    		QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^
    			QRMath.EXP_TABLE[i - 5] ^
    			QRMath.EXP_TABLE[i - 6] ^
    			QRMath.EXP_TABLE[i - 8];
    	}
    	for (var i = 0; i < 255; i++) {
        
    		QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i;
    	}
    
    	//---------------------------------------------------------------------
    	// QRPolynomial
    	//---------------------------------------------------------------------
    
    	function QRPolynomial(num, shift) {
        
    
    		if (num.length == undefined) {
        
    			throw new Error(num.length + "/" + shift);
    		}
    
    		var offset = 0;
    
    		while (offset < num.length && num[offset] == 0) {
        
    			offset++;
    		}
    
    		this.num = new Array(num.length - offset + shift);
    		for (var i = 0; i < num.length - offset; i++) {
        
    			this.num[i] = num[i + offset];
    		}
    	}
    
    	QRPolynomial.prototype = {
        
    
    		get: function(index) {
        
    			return this.num[index];
    		},
    
    		getLength: function() {
        
    			return this.num.length;
    		},
    
    		multiply: function(e) {
        
    
    			var num = new Array(this.getLength() + e.getLength() - 1);
    
    			for (var i = 0; i < this.getLength(); i++) {
        
    				for (var j = 0; j < e.getLength(); j++) {
        
    					num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j)));
    				}
    			}
    
    			return new QRPolynomial(num, 0);
    		},
    
    		mod: function(e) {
        
    
    			if (this.getLength() - e.getLength() < 0) {
        
    				return this;
    			}
    
    			var ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0));
    
    			var num = new Array(this.getLength());
    
    			for (var i = 0; i < this.getLength(); i++) {
        
    				num[i] = this.get(i);
    			}
    
    			for (var i = 0; i < e.getLength(); i++) {
        
    				num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio);
    			}
    
    			// recursive call
    			return new QRPolynomial(num, 0).mod(e);
    		}
    	};
    
    	//---------------------------------------------------------------------
    	// QRRSBlock
    	//---------------------------------------------------------------------
    
    	function QRRSBlock(totalCount, dataCount) {
        
    		this.totalCount = totalCount;
    		this.dataCount = dataCount;
    	}
    
    	QRRSBlock.RS_BLOCK_TABLE = [
    
    		// L
    		// M
    		// Q
    		// H
    
    		// 1
    		[1, 26, 19],
    		[1, 26, 16],
    		[1, 26, 13],
    		[1, 26, 9],
    
    		// 2
    		[1, 44, 34],
    		[1, 44, 28],
    		[1, 44, 22],
    		[1, 44, 16],
    
    		// 3
    		[1, 70, 55],
    		[1, 70, 44],
    		[2, 35, 17],
    		[2, 35, 13],
    
    		// 4		
    		[1, 100, 80],
    		[2, 50, 32],
    		[2, 50, 24],
    		[4, 25, 9],
    
    		// 5
    		[1, 134, 108],
    		[2, 67, 43],
    		[2, 33, 15, 2, 34, 16],
    		[2, 33, 11, 2, 34, 12],
    
    		// 6
    		[2, 86, 68],
    		[4, 43, 27],
    		[4, 43, 19],
    		[4, 43, 15],
    
    		// 7		
    		[2, 98, 78],
    		[4, 49, 31],
    		[2, 32, 14, 4, 33, 15],
    		[4, 39, 13, 1, 40, 14],
    
    		// 8
    		[2, 121, 97],
    		[2, 60, 38, 2, 61, 39],
    		[4, 40, 18, 2, 41, 19],
    		[4, 40, 14, 2, 41, 15],
    
    		// 9
    		[2, 146, 116],
    		[3, 58, 36, 2, 59, 37],
    		[4, 36, 16, 4, 37, 17],
    		[4, 36, 12, 4, 37, 13],
    
    		// 10		
    		[2, 86, 68, 2, 87, 69],
    		[4, 69, 43, 1, 70, 44],
    		[6, 43, 19, 2, 44, 20],
    		[6, 43, 15, 2, 44, 16],
    
    		// 11
    		[4, 101, 81],
    		[1, 80, 50, 4, 81, 51],
    		[4, 50, 22, 4, 51, 23],
    		[3, 36, 12, 8, 37, 13],
    
    		// 12
    		[2, 116, 92, 2, 117, 93],
    		[6, 58, 36, 2, 59, 37],
    		[4, 46, 20, 6, 47, 21],
    		[7, 42, 14, 4, 43, 15],
    
    		// 13
    		[4, 133, 107],
    		[8, 59, 37, 1, 60, 38],
    		[8, 44, 20, 4, 45, 21],
    		[12, 33, 11, 4, 34, 12],
    
    		// 14
    		[3, 145, 115, 1, 146, 116],
    		[4, 64, 40, 5, 65, 41],
    		[11, 36, 16, 5, 37, 17],
    		[11, 36, 12, 5, 37, 13],
    
    		// 15
    		[5, 109, 87, 1, 110, 88],
    		[5, 65, 41, 5, 66, 42],
    		[5, 54, 24, 7, 55, 25],
    		[11, 36, 12],
    
    		// 16
    		[5, 122, 98, 1, 123, 99],
    		[7, 73, 45, 3, 74, 46],
    		[15, 43, 19, 2, 44, 20],
    		[3, 45, 15, 13, 46, 16],
    
    		// 17
    		[1, 135, 107, 5, 136, 108],
    		[10, 74, 46, 1, 75, 47],
    		[1, 50, 22, 15, 51, 23],
    		[2, 42, 14, 17, 43, 15],
    
    		// 18
    		[5, 150, 120, 1, 151, 121],
    		[9, 69, 43, 4, 70, 44],
    		[17, 50, 22, 1, 51, 23],
    		[2, 42, 14, 19, 43, 15],
    
    		// 19
    		[3, 141, 113, 4, 142, 114],
    		[3, 70, 44, 11, 71, 45],
    		[17, 47, 21, 4, 48, 22],
    		[9, 39, 13, 16, 40, 14],
    
    		// 20
    		[3, 135, 107, 5, 136, 108],
    		[3, 67, 41, 13, 68, 42],
    		[15, 54, 24, 5, 55, 25],
    		[15, 43, 15, 10, 44, 16],
    
    		// 21
    		[4, 144, 116, 4, 145, 117],
    		[17, 68, 42],
    		[17, 50, 22, 6, 51, 23],
    		[19, 46, 16, 6, 47, 17],
    
    		// 22
    		[2, 139, 111, 7, 140, 112],
    		[17, 74, 46],
    		[7, 54, 24, 16, 55, 25],
    		[34, 37, 13],
    
    		// 23
    		[4, 151, 121, 5, 152, 122],
    		[4, 75, 47, 14, 76, 48],
    		[11, 54, 24, 14, 55, 25],
    		[16, 45, 15, 14, 46, 16],
    
    		// 24
    		[6, 147, 117, 4, 148, 118],
    		[6, 73, 45, 14, 74, 46],
    		[11, 54, 24, 16, 55, 25],
    		[30, 46, 16, 2, 47, 17],
    
    		// 25
    		[8, 132, 106, 4, 133, 107],
    		[8, 75, 47, 13, 76, 48],
    		[7, 54, 24, 22, 55, 25],
    		[22, 45, 15, 13, 46, 16],
    
    		// 26
    		[10, 142, 114, 2, 143, 115],
    		[19, 74, 46, 4, 75, 47],
    		[28, 50, 22, 6, 51, 23],
    		[33, 46, 16, 4, 47, 17],
    
    		// 27
    		[8, 152, 122, 4, 153, 123],
    		[22, 73, 45, 3, 74, 46],
    		[8, 53, 23, 26, 54, 24],
    		[12, 45, 15, 28, 46, 16],
    
    		// 28
    		[3, 147, 117, 10, 148, 118],
    		[3, 73, 45, 23, 74, 46],
    		[4, 54, 24, 31, 55, 25],
    		[11, 45, 15, 31, 46, 16],
    
    		// 29
    		[7, 146, 116, 7, 147, 117],
    		[21, 73, 45, 7, 74, 46],
    		[1, 53, 23, 37, 54, 24],
    		[19, 45, 15, 26, 46, 16],
    
    		// 30
    		[5, 145, 115, 10, 146, 116],
    		[19, 75, 47, 10, 76, 48],
    		[15, 54, 24, 25, 55, 25],
    		[23, 45, 15, 25, 46, 16],
    
    		// 31
    		[13, 145, 115, 3, 146, 116],
    		[2, 74, 46, 29, 75, 47],
    		[42, 54, 24, 1, 55, 25],
    		[23, 45, 15, 28, 46, 16],
    
    		// 32
    		[17, 145, 115],
    		[10, 74, 46, 23, 75, 47],
    		[10, 54, 24, 35, 55, 25],
    		[19, 45, 15, 35, 46, 16],
    
    		// 33
    		[17, 145, 115, 1, 146, 116],
    		[14, 74, 46, 21, 75, 47],
    		[29, 54, 24, 19, 55, 25],
    		[11, 45, 15, 46, 46, 16],
    
    		// 34
    		[13, 145, 115, 6, 146, 116],
    		[14, 74, 46, 23, 75, 47],
    		[44, 54, 24, 7, 55, 25],
    		[59, 46, 16, 1, 47, 17],
    
    		// 35
    		[12, 151, 121, 7, 152, 122],
    		[12, 75, 47, 26, 76, 48],
    		[39, 54, 24, 14, 55, 25],
    		[22, 45, 15, 41, 46, 16],
    
    		// 36
    		[6, 151, 121, 14, 152, 122],
    		[6, 75, 47, 34, 76, 48],
    		[46, 54, 24, 10, 55, 25],
    		[2, 45, 15, 64, 46, 16],
    
    		// 37
    		[17, 152, 122, 4, 153, 123],
    		[29, 74, 46, 14, 75, 47],
    		[49, 54, 24, 10, 55, 25],
    		[24, 45, 15, 46, 46, 16],
    
    		// 38
    		[4, 152, 122, 18, 153, 123],
    		[13, 74, 46, 32, 75, 47],
    		[48, 54, 24, 14, 55, 25],
    		[42, 45, 15, 32, 46, 16],
    
    		// 39
    		[20, 147, 117, 4, 148, 118],
    		[40, 75, 47, 7, 76, 48],
    		[43, 54, 24, 22, 55, 25],
    		[10, 45, 15, 67, 46, 16],
    
    		// 40
    		[19, 148, 118, 6, 149, 119],
    		[18, 75, 47, 31, 76, 48],
    		[34, 54, 24, 34, 55, 25],
    		[20, 45, 15, 61, 46, 16]
    	];
    
    	QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) {
        
    
    		var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel);
    
    		if (rsBlock == undefined) {
        
    			throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel);
    		}
    
    		var length = rsBlock.length / 3;
    
    		var list = new Array();
    
    		for (var i = 0; i < length; i++) {
        
    
    			var count = rsBlock[i * 3 + 0];
    			var totalCount = rsBlock[i * 3 + 1];
    			var dataCount = rsBlock[i * 3 + 2];
    
    			for (var j = 0; j < count; j++) {
        
    				list.push(new QRRSBlock(totalCount, dataCount));
    			}
    		}
    
    		return list;
    	}
    
    	QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) {
        
    
    		switch (errorCorrectLevel) {
        
    			case QRErrorCorrectLevel.L:
    				return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
    			case QRErrorCorrectLevel.M:
    				return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
    			case QRErrorCorrectLevel.Q:
    				return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
    			case QRErrorCorrectLevel.H:
    				return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
    			default:
    				return undefined;
    		}
    	}
    
    	//---------------------------------------------------------------------
    	// QRBitBuffer
    	//---------------------------------------------------------------------
    
    	function QRBitBuffer() {
        
    		this.buffer = new Array();
    		this.length = 0;
    	}
    
    	QRBitBuffer.prototype = {
        
    
    		get: function(index) {
        
    			var bufIndex = Math.floor(index / 8);
    			return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1) == 1;
    		},
    
    		put: function(num, length) {
        
    			for (var i = 0; i < length; i++) {
        
    				this.putBit(((num >>> (length - i - 1)) & 1) == 1);
    			}
    		},
    
    		getLengthInBits: function() {
        
    			return this.length;
    		},
    
    		putBit: function(bit) {
        
    
    			var bufIndex = Math.floor(this.length / 8);
    			if (this.buffer.length <= bufIndex) {
        
    				this.buffer.push(0);
    			}
    
    			if (bit) {
        
    				this.buffer[bufIndex] |= (0x80 >>> (this.length % 8));
    			}
    
    			this.length++;
    		}
    	};
    
    	//---------------------------------------------------------------------
    	// Support Chinese
    	//---------------------------------------------------------------------
    	function utf16To8(text) {
        
    		var result = '';
    		var c;
    		for (var i = 0; i < text.length; i++) {
        
    			c = text.charCodeAt(i);
    			if (c >= 0x0001 && c <= 0x007F) {
        
    				result += text.charAt(i);
    			} else if (c > 0x07FF) {
        
    				result += String.fromCharCode(0xE0 | c >> 12 & 0x0F);
    				result += String.fromCharCode(0x80 | c >> 6 & 0x3F);
    				result += String.fromCharCode(0x80 | c >> 0 & 0x3F);
    			} else {
        
    				result += String.fromCharCode(0xC0 | c >> 6 & 0x1F);
    				result += String.fromCharCode(0x80 | c >> 0 & 0x3F);
    			}
    		}
    		return result;
    	}
    
    	uQRCode = {
        
    
    		errorCorrectLevel: QRErrorCorrectLevel,
    
    		defaults: {
        
    			size: 354,
    			margin: 0,
    			backgroundColor: '#ffffff',
    			foregroundColor: '#000000',
    			fileType: 'png', // 'jpg', 'png'
    			errorCorrectLevel: QRErrorCorrectLevel.H,
    			typeNumber: -1
    		},
    
    		make: function(options) {
        
    			return new Promise((reslove, reject) => {
        
    				var defaultOptions = {
        
    					canvasId: options.canvasId,
    					componentInstance: options.componentInstance,
    					text: options.text,
    					size: this.defaults.size,
    					margin: this.defaults.margin,
    					backgroundColor: this.defaults.backgroundColor,
    					foregroundColor: this.defaults.foregroundColor,
    					fileType: this.defaults.fileType,
    					errorCorrectLevel: this.defaults.errorCorrectLevel,
    					typeNumber: this.defaults.typeNumber
    				};
    				if (options) {
        
    					for (var i in options) {
        
    						defaultOptions[i] = options[i];
    					}
    				}
    				options = defaultOptions;
    				if (!options.canvasId) {
        
    					console.error('uQRCode: Please set canvasId!');
    					return;
    				}
    
    				function createCanvas() {
        
    					var qrcode = new QRCode(options.typeNumber, options.errorCorrectLevel);
    					qrcode.addData(utf16To8(options.text));
    					qrcode.make();
    
    					var ctx = uni.createCanvasContext(options.canvasId, options.componentInstance);
    					ctx.setFillStyle(options.backgroundColor);
    					ctx.fillRect(0, 0, options.size, options.size);
    
    					var tileW = (options.size - options.margin * 2) / qrcode.getModuleCount();
    					var tileH = tileW;
    
    					for (var row = 0; row < qrcode.getModuleCount(); row++) {
        
    						for (var col = 0; col < qrcode.getModuleCount(); col++) {
        
    							var style = qrcode.isDark(row, col) ? options.foregroundColor : options.backgroundColor;
    							ctx.setFillStyle(style);
    							var x = Math.round(col * tileW) + options.margin;
    							var y = Math.round(row * tileH) + options.margin;
    							var w = Math.ceil((col + 1) * tileW) - Math.floor(col * tileW);
    							var h = Math.ceil((row + 1) * tileW) - Math.floor(row * tileW);
    							ctx.fillRect(x, y, w, h);
    						}
    					}
    
    					setTimeout(function() {
        
    						ctx.draw(false, (function() {
        
    							setTimeout(function() {
        
    								uni.canvasToTempFilePath({
        
    									canvasId: options.canvasId,
    									fileType: options.fileType,
    									width: options.size,
    									height: options.size,
    									destWidth: options.size,
    									destHeight: options.size,
    									success: function(res) {
        
    										let resData; // 将统一为base64格式
    										let tempFilePath = res.tempFilePath; // H5为base64，其他为相对路径
    
    										// #ifdef H5
    										resData = tempFilePath;
    										options.success && options.success(resData);
    										reslove(resData);
    										// #endif
    
    										// #ifdef APP-PLUS
    										const path = plus.io.convertLocalFileSystemURL(tempFilePath) // 绝对路径
    										let fileReader = new plus.io.FileReader();
    										fileReader.readAsDataURL(path);
    										fileReader.onloadend = res => {
        
    											resData = res.target.result;
    											options.success && options.success(resData);
    											reslove(resData);
    										};
    										// #endif
    
    										// #ifdef MP-WEIXIN || MP-QQ || MP-TOUTIAO
    										uni.getFileSystemManager().readFile({
        
    											filePath: tempFilePath,
    											encoding: 'base64',
    											success: res => {
        
    												resData = 'data:image/png;base64,' + res.data;
    												options.success && options.success(resData);
    												reslove(resData);
    											}
    										})
    										// #endif
    
    										// #ifndef H5 || APP-PLUS || MP-WEIXIN || MP-QQ || MP-TOUTIAO
    										if (plus) {
        
    											const path = plus.io.convertLocalFileSystemURL(tempFilePath) // 绝对路径
    											let fileReader = new plus.io.FileReader();
    											fileReader.readAsDataURL(path);
    											fileReader.onloadend = res => {
        
    												resData = res.target.result;
    												options.success && options.success(resData);
    												reslove(resData);
    											};
    										} else {
        
    											uni.request({
        
    												url: tempFilePath,
    												method: 'GET',
    												responseType: 'arraybuffer',
    												success: res => {
        
    													resData = `data:image/png;base64,${
        uni.arrayBufferToBase64(res.data)}`; // 把arraybuffer转成base64
    													options.success && options.success(resData);
    													reslove(resData);
    												}
    											})
    										}
    										// #endif
    									},
    									fail: function(error) {
        
    										options.fail && options.fail(error);
    										reject(error);
    									},
    									complete: function(res) {
        
    										options.complete && options.complete(res);
    									}
    								}, options.componentInstance);
    							}, options.text.length + 100);
    						})());
    					}, 150);
    				}
    
    				createCanvas();
    			});
    		}
    	}
    
    })()
    
    export default uQRCode

结束了