uni-app实现上拉加载，下拉刷新（下拉带动画）

逃离我推掉我的手 2021-09-17 04:24 2046阅读 0赞

直接代码展示了

uni-app的上拉加载动画感觉还行，废话不多说了。。。

1在pages.json添加允许下拉刷新

{
    			"path":"pages/lookuser/lookuser",
    			"style":{
    				"navigationBarTitleText":"用户日志",
    				"enablePullDownRefresh": true//就是这个
    			}
    		}

2.上拉加载更多组件

这个要新建一个文件夹来放  我的放在component下了

component/uni-load-more.vue

<template>
    	<view class="load-more">
    		<view class="loading-img" v-show="loadingType === 1 && showImage">
    			<view class="load1">
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    			</view>
    			<view class="load2">
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    			</view>
    			<view class="load3">
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    				<view :style="{background:color}"></view>
    			</view>
    		</view>
    		<text class="loading-text" :style="{color:color}">
    		{
       {loadingType === 0 ? contentText.contentdown : (loadingType === 1 ? contentText.contentrefresh : contentText.contentnomore)}}</text>
    	</view>
    </template>
    
    <script>
    	export default {
    		name: "load-more",
    		props: {
    			loadingType: {
    				//上拉的状态：0-loading前；1-loading中；2-没有更多了
    				type: Number,
    				default: 0
    			},
    			showImage: {
    				type: Boolean,
    				default: true
    			},
    			color: {
    				type: String,
    				default: "#777777"
    			},
    			contentText: {
    				type: Object,
    				default () {
    					return {
    						contentdown: "上拉显示更多",
    						contentrefresh: "正在加载...",
    						contentnomore: "没有更多数据了"
    					};
    				}
    			}
    		},
    		data() {
    			return {}
    		}
    	}
    </script>
    
    <style>
    	.load-more {
    		display: flex;
    		flex-direction: row;
    		height: 80upx;
    		align-items: center;
    		justify-content: center;
    	}
    
    	.loading-img {
    		height: 24px;
    		width: 24px;
    		margin-right: 10px;
    	}
    
    	.loading-text {
    		font-size: 28upx;
    		color: #777777;
    	}
    
    	.loading-img>view {
    		position: absolute;
    	}
    
    	.load1,
    	.load2,
    	.load3 {
    		height: 24px;
    		width: 24px;
    	}
    
    	.load2 {
    		transform: rotate(30deg);
    	}
    
    	.load3 {
    		transform: rotate(60deg);
    	}
    
    	.loading-img>view view {
    		width: 6px;
    		height: 2px;
    		border-top-left-radius: 1px;
    		border-bottom-left-radius: 1px;
    		background: #777;
    		position: absolute;
    		opacity: 0.2;
    		transform-origin: 50%;
    		-webkit-animation: load 1.56s ease infinite;
    	}
    
    	.loading-img>view view:nth-child(1) {
    		transform: rotate(90deg);
    		top: 2px;
    		left: 9px;
    	}
    
    	.loading-img>view view:nth-child(2) {
    		-webkit-transform: rotate(180deg);
    		top: 11px;
    		right: 0px;
    	}
    
    	.loading-img>view view:nth-child(3) {
    		transform: rotate(270deg);
    		bottom: 2px;
    		left: 9px;
    	}
    
    	.loading-img>view view:nth-child(4) {
    		top: 11px;
    		left: 0px;
    	}
    
    	.load1 view:nth-child(1) {
    		animation-delay: 0s;
    	}
    
    	.load2 view:nth-child(1) {
    		animation-delay: 0.13s;
    	}
    
    	.load3 view:nth-child(1) {
    		animation-delay: 0.26s;
    	}
    
    	.load1 view:nth-child(2) {
    		animation-delay: 0.39s;
    	}
    
    	.load2 view:nth-child(2) {
    		animation-delay: 0.52s;
    	}
    
    	.load3 view:nth-child(2) {
    		animation-delay: 0.65s;
    	}
    
    	.load1 view:nth-child(3) {
    		animation-delay: 0.78s;
    	}
    
    	.load2 view:nth-child(3) {
    		animation-delay: 0.91s;
    	}
    
    	.load3 view:nth-child(3) {
    		animation-delay: 1.04s;
    	}
    
    	.load1 view:nth-child(4) {
    		animation-delay: 1.17s;
    	}
    
    	.load2 view:nth-child(4) {
    		animation-delay: 1.30s;
    	}
    
    	.load3 view:nth-child(4) {
    		animation-delay: 1.43s;
    	}
    
    	@-webkit-keyframes load {
    		0% {
    			opacity: 1;
    		}
    
    		100% {
    			opacity: 0.2;
    		}
    	}
    </style>

3.在页面上调用组件

<template>
        <view style="flex: 1;">
    				<view v-for="(item, index) in newsList" class="newslist">{
       {item}}</view>
    				
    				<uni-load-more  :loadingType="loadingType" :contentText="contentText" ></uni-load-more>
    	 </view>
    </template>
    
    <script>
    	//1引入组件 uni-load-more.vue
    import uniLoadMore from '../../component/uni-load-more.vue';
    		
    		var _self,
    				page = 1,
    				timer = null;
    		// 定义全局参数,控制数据加载
    		
    export default {
        components: {//2注册组件
            uniLoadMore
        },
        data: {
            newsList: [],
            loadingText: '加载中...',
            loadingType: 0,//定义加载方式 0---contentdown  1---contentrefresh 2---contentnomore
            contentText: {
                contentdown:'上拉显示更多',
                contentrefresh: '正在加载...',
                contentnomore: '没有更多数据了'
            }
        },
        onLoad: function() {
            _self = this;
    				//页面一加载时请求一次数据
            this.getnewsList();
        },
        onPullDownRefresh: function() {
    				//下拉刷新的时候请求一次数据
            this.getnewsList();
        },
        onReachBottom: function() {
    			//触底的时候请求数据，即为上拉加载更多
    			//为了更加清楚的看到效果，添加了定时器
            if (timer != null) {
                clearTimeout(timer);
            }
            timer = setTimeout(function() {
                _self.getmorenews();
            }, 1000);
    				
    				// 正常应为:
    				// _self.getmorenews();
        },
        methods: {
            getmorenews: function() {
                if (_self.loadingType !== 0) {//loadingType!=0;直接返回
                    return false;
                }
                _self.loadingType = 1;
                uni.showNavigationBarLoading();//显示加载动画
                uni.request({
                    url:'https://demo.hcoder.net/index.php?user=hcoder&pwd=hcoder&m=list1&page=' + page,
                    method: 'GET',
                    success: function(res) {
                        console.log(JSON.stringify(res));
                        if (res.data == null) {//没有数据
                            _self.loadingType = 2;
                            uni.hideNavigationBarLoading();//关闭加载动画
                            return;
                        }
                        page++;//每触底一次 page +1
                        _self.newsList = _self.newsList.concat(res.data.split('--hcSplitor--'));//将数据拼接在一起
                        _self.loadingType = 0;//将loadingType归0重置
                        uni.hideNavigationBarLoading();//关闭加载动画
                    }
                });
            },
            getnewsList: function() {//第一次回去数据
                page = 1;
                this.loadingType = 0;
                uni.showNavigationBarLoading();
                uni.request({
                    url: 'https://demo.hcoder.net/index.php?user=hcoder&pwd=hcoder&m=list1&page=1',
                    method: 'GET',
                    success: function(res) {
                        page++;//得到数据之后page+1
                        _self.newsList = res.data.split('--hcSplitor--');
                        uni.hideNavigationBarLoading();
                        uni.stopPullDownRefresh();//得到数据后停止下拉刷新
                    }
                });
            }
        }
    };
    </script>
    <style>
    .newslist {
        padding: 10px;
        line-height: 60px;
        font-size: 28px;
    }
    .loading {
        text-align: center;
        line-height: 80px;
    }
    </style>

具体说明代码里面已经注释好了

现在将代码复制过去就能调用了，赶快试试吧