iOS 封装原生二维码扫描和生成

喜欢ヅ旅行 2022-03-16 14:16 257阅读 0赞

> 功能描述:[WSLNativeScanTool][]是在利用原生API的条件下封装的二维码扫描工具，支持二维码的扫描、识别图中二维码、生成自定义颜色和中心图标的二维码、监测环境亮度、打开闪光灯这些功能；[WSLScanView][WSLNativeScanTool]是参照微信封装的一个扫一扫界面，支持线条颜色、大小、动画图片、矩形扫描框样式的自定义；这个示例本身就是仿照微信的扫一扫功能实现的。

*  详细实现就不在此唠叨了，直接去看代码吧，注释详细是我的习惯?→[WSLNativeScanTool][]
 *  来看一下WSLNativeScanTool.h ，用法很明朗

@import UIKit;
    @import AVFoundation;
    
    #import <Foundation/Foundation.h>
    
    /**
     扫描完成的回调
     @param scanString 扫描出的字符串
     */
    typedef void(^WSLScanFinishedBlock)( NSString * _Nullable scanString);
    
    /**
     监听环境光感的回调
     @param brightness 亮度值
     */
    typedef void(^WSLMonitorLightBlock)( float brightness);
    
    @interface WSLNativeScanTool : NSObject
    
    /**
     扫描出结果后的回调 ，注意循环引用的问题
     */
    @property (nonatomic, copy) WSLScanFinishedBlock _Nullable scanFinishedBlock;
    
    /**
     监听环境光感的回调,如果 != nil 表示开启监测环境亮度功能
     */
    @property (nonatomic, copy) WSLMonitorLightBlock _Nullable monitorLightBlock;
    
    /**
     闪光灯的状态,不需要设置，仅供外边判断状态使用
     */
    @property (nonatomic, assign) BOOL flashOpen;
    
    /**
     初始化 扫描工具
     @param preview 展示输出流的视图
     @param scanFrame 扫描中心识别区域范围
     */
    - (instancetype )initWithPreview:(UIView *)preview andScanFrame:(CGRect)scanFrame;
    
    /**
     闪光灯开关
     */
    - (void)openFlashSwitch:(BOOL)open;
    
    - (void)sessionStartRunning;
    
    - (void)sessionStopRunning;
    
    /**
     识别图中二维码
     */
    - (void)scanImageQRCode:(UIImage *_Nullable)imageCode;
    
    /**
     生成自定义样式二维码
     注意：有些颜色结合生成的二维码识别不了
     @param codeString 字符串
     @param size 大小
     @param backColor 背景色
     @param frontColor 前景色
     @param centerImage 中心图片
     @return image二维码
     */
    + (UIImage *)createQRCodeImageWithString:(nonnull NSString *)codeString andSize:(CGSize)size andBackColor:(nullable UIColor *)backColor andFrontColor:(nullable UIColor *)frontColor andCenterImage:(nullable UIImage *)centerImage;
    
    复制代码

*  再来看一下WSLScanView.h,用法也明朗?

//
    //  WSLScanView.h
    //  ScanQRcode
    //
    //  Created by 王双龙 on 2018/2/28.
    //  Copyright © 2018年 https://www.jianshu.com/u/e15d1f644bea
    All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    typedef void(^WSLMyQRCodeBlock)(void);
    
    typedef void(^WSLFlashSwitchBlock)(BOOL open);
    
    @interface WSLScanView : UIView
    
    /**
     点击我的二维码的回调
     */
    @property (nonatomic,copy) WSLMyQRCodeBlock myQRCodeBlock;
    
    /**
     打开/关闭闪光灯的回调
     */
    @property (nonatomic,copy) WSLFlashSwitchBlock flashSwitchBlock;
    
    #pragma mark - 扫码区域
    
    /**
     扫码区域 默认为正方形,x = 60, y = 100
     */
    @property (nonatomic,assign)CGRect scanRetangleRect;
    /**
     @brief  是否需要绘制扫码矩形框，默认YES
     */
    @property (nonatomic, assign) BOOL isNeedShowRetangle;
    /**
     @brief  矩形框线条颜色
     */
    @property (nonatomic, strong, nullable) UIColor *colorRetangleLine;
    
    #pragma mark - 矩形框(扫码区域)周围4个角
    
    //4个角的颜色
    @property (nonatomic, strong, nullable) UIColor* colorAngle;
    //扫码区域4个角的宽度和高度 默认都为20
    @property (nonatomic, assign) CGFloat photoframeAngleW;
    @property (nonatomic, assign) CGFloat photoframeAngleH;
    /**
     @brief  扫码区域4个角的线条宽度,默认6
     */
    @property (nonatomic, assign) CGFloat photoframeLineW;
    
    #pragma mark --动画效果
    
    /**
     *  动画效果的图像
     */
    @property (nonatomic,strong, nullable) UIImage * animationImage;
    /**
     非识别区域颜色,默认 RGBA (0,0,0,0.5)
     */
    @property (nonatomic, strong, nullable) UIColor * notRecoginitonArea;
    
    /**
     *  开始扫描动画
     */
    - (void)startScanAnimation;
    /**
     *  结束扫描动画
     */
    - (void)stopScanAnimation;
    
    /**
     正在处理扫描到的结果
     */
    - (void)handlingResultsOfScan;
    
    /**
     完成扫描结果处理
     */
    - (void)finishedHandle;
    
    /**
     是否显示闪光灯开关
     @param show YES or NO
     */
    - (void)showFlashSwitch:(BOOL)show;
    @end
    
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\#\#\#\#用法

*  实例化WSLNativeScanTool和WSLScanView

//输出流视图
        UIView *preview  = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 0)];
        [self.view addSubview:preview];
        
        __weak typeof(self) weakSelf = self;
        
        //构建扫描样式视图
        _scanView = [[WSLScanView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 0)];
        _scanView.scanRetangleRect = CGRectMake(60, 120, (self.view.frame.size.width - 2 * 60),  (self.view.frame.size.width - 2 * 60));
        _scanView.colorAngle = [UIColor greenColor];
        _scanView.photoframeAngleW = 20;
        _scanView.photoframeAngleH = 20;
        _scanView.photoframeLineW = 2;
        _scanView.isNeedShowRetangle = YES;
        _scanView.colorRetangleLine = [UIColor whiteColor];
        _scanView.notRecoginitonArea = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5];
        _scanView.animationImage = [UIImage imageNamed:@"scanLine"];
        _scanView.myQRCodeBlock = ^{
         [WSLNativeScanTool createQRCodeImageWithString:@"https://www.jianshu.com/u/e15d1f644bea" andSize:CGSizeMake(250, 250) andBackColor:[UIColor whiteColor] andFrontColor:[UIColor orangeColor] andCenterImage:[UIImage imageNamed:@"piao"]];
            createQRCodeController.qrString = @"https://www.jianshu.com/u/e15d1f644bea";
        };
        _scanView.flashSwitchBlock = ^(BOOL open) {
            [weakSelf.scanTool openFlashSwitch:open];
        };
        [self.view addSubview:_scanView];
        
        //初始化扫描工具
        _scanTool = [[WSLNativeScanTool alloc] initWithPreview:preview andScanFrame:_scanView.scanRetangleRect];
        _scanTool.scanFinishedBlock = ^(NSString *scanString) {
            NSLog(@"扫描结果 %@",scanString);
            [weakSelf.scanTool sessionStopRunning];
            [weakSelf.scanTool openFlashSwitch:NO];
        };
        _scanTool.monitorLightBlock = ^(float brightness) {
            NSLog(@"环境光感 ： %f",brightness);
            if (brightness < 0) {
                // 环境太暗，显示闪光灯开关按钮
                [weakSelf.scanView showFlashSwitch:YES];
            }else if(brightness > 0){
                // 环境亮度可以,且闪光灯处于关闭状态时，隐藏闪光灯开关
                if(!weakSelf.scanTool.flashOpen){
                    [weakSelf.scanView showFlashSwitch:NO];
                }
            }
        };
        [_scanTool sessionStartRunning];
        [_scanView startScanAnimation];
        
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好了到此结束，告辞~ 需要的瞅这里→[WSLNativeScanTool][]

[WSLNativeScanTool]: https://link.juejin.im?target=https%3A%2F%2Fgithub.com%2Fwslcmk%2FScanQRcode.git