눈 깜짝할 사이에 WeChat 미니 프로그램 시리즈에 이미 10개의 코스가 있습니다. 무겁고 어린 소녀도 이 튜토리얼 시리즈를 얼마나 오랫동안 계속할 수 있을지 모르겠습니다. 모든 튜토리얼이 모든 사람에게 정말 도움이 되기를 바랍니다. 이번 강의에서 소개할 내용은 페이징 드롭다운 로딩 구현 방법입니다. 먼저 렌더링을 살펴보겠습니다
<view class="copyright">
<view class="copyright_item">CopyRight：All Right Reserved</view>
<view class="copyright_item">原创作者：51小程序</view>
<view class="copyright_item">微信小程序开发者社区</view>
<view class="copyright_item">HTML51.COM</view>
<view class="copyright_item"><image class="img" src="../copyright/image/logo.png"/></view>
<view class="goto_counter"><button type="default" bindtap="goto_counter">点击进入下拉加载演示页面</button></view>
</view>
主要的页面结果如下：
1.index.wxml
<view class="search">
<view class="search-bar">
<view class="search-wrap">
<icon type="search" size="16" class="icon-search" />
<input type="text" placeholder="请输入搜索内容" class="search-input" name="searchKeyword" bindinput="bindKeywordInput" value="{{searchKeyword}}" />
</view>
<view class="search-cancel" bindtap="keywordSearch">搜索</view>
</view>
<view class="search-result">
<scroll-view scroll-y="true" bindscrolltolower="searchScrollLower">
<view class="result-item" wx:for="{{searchSongList}}" wx:key="unique" data-data="{{item}}" >
<view class="icon{{item.isonly=='0' ? ' nocopyright' : ''}}"></view>
<text class="title">{{item.songname}}</text>
<view class="subtitle">
<text wx:for="{{item.singer}}" wx:key="unique">{{item.name}}</text>
</view>
</view>
<view class="loading" hidden="{{!searchLoading}}">正在载入更多...</view>
<view class="loading complete" hidden="{{!searchLoadingComplete}}">已加载全部</view>
</scroll-view>
</view>
</view>2.index.wxss
page{
display: flex;
flex-direction: column;
height: 100%;
}
/*搜索*/
.search{
flex: auto;
display: flex;
flex-direction: column;
background: #fff;
}
.search-bar{
flex: none;
display: flex;
align-items: center;
justify-content: space-between;
padding: 20rpx;
background: #f4f4f4;
}
.search-wrap{
position: relative;
flex: auto;
display: flex;
align-items: center;
height: 80rpx;
padding: 0 20rpx;
background: #fff;
border-radius: 6rpx;
}
.search-wrap .icon-search{
margin-right: 10rpx;
}
.search-wrap .search-input{
flex: auto;
font-size: 28rpx;
}
.search-cancel{
padding: 0 20rpx;
font-size: 28rpx;
}
/*搜索结果*/
.search-result{
flex: auto;
position: relative;
}
.search-result scroll-view{
position: absolute;
bottom: 0;
left: 0;
right: 0;
top: 0;
}
.result-item{
position: relative;
display: flex;
flex-direction: column;
padding: 20rpx 0 20rpx 110rpx;
overflow: hidden;
border-bottom: 2rpx solid #e5e5e5;
}
.result-item .media{
position: absolute;
left: 16rpx;
top: 16rpx;
width: 80rpx;
height: 80rpx;
border-radius: 999rpx;
}
.result-item .title,
.result-item .subtitle{
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
line-height: 36rpx;
}
.result-item .title{
margin-bottom: 4rpx;
color: #000;
}
.result-item .subtitle{
color: #808080;
font-size: 24rpx;
}
.result-item:first-child .subtitle text{
margin-right: 20rpx;
}
.result-item:not(:first-child) .subtitle text:not(:first-child):before{
content: '/';
margin: 0 8rpx;
}
.loading{
padding: 10rpx;
text-align: center;
}
.loading:before{
display: inline-block;
margin-right: 5rpx;
vertical-align: middle;
content: '';
width: 40rpx;
height: 40rpx;
background: url(../index/images/icon-loading.png) no-repeat;
background-size: contain;
animation: rotate 1s linear infinite;
}
.loading.complete:before{
display: none;
}3.index.js
var util = require('../../utils/util.js')
Page({
data: {
searchKeyword: '', //需要搜索的字符
searchSongList: [], //放置返回数据的数组
isFromSearch: true, // 用于判断searchSongList数组是不是空数组，默认true，空的数组
searchPageNum: 1, // 设置加载的第几次，默认是第一次
callbackcount: 15, //返回数据的个数
searchLoading: false, //"上拉加载"的变量，默认false，隐藏
searchLoadingComplete: false //“没有数据”的变量，默认false，隐藏
},
//输入框事件，每输入一个字符，就会触发一次
bindKeywordInput: function(e){
console.log("输入框事件")
this.setData({
searchKeyword: e.detail.value
})
},
//搜索，访问网络
fetchSearchList: function(){
let that = this;
let searchKeyword = that.data.searchKeyword,//输入框字符串作为参数
searchPageNum = that.data.searchPageNum,//把第几次加载次数作为参数
callbackcount =that.data.callbackcount; //返回数据的个数
//访问网络
util.getSearchMusic(searchKeyword, searchPageNum,callbackcount, function(data){
console.log(data)
//判断是否有数据，有则取数据
if(data.data.song.curnum != 0){
let searchList = [];
//如果isFromSearch是true从data中取出数据，否则先从原来的数据继续添加
that.data.isFromSearch ? searchList=data.data.song.list : searchList=that.data.searchSongList.concat(data.data.song.list)
that.setData({
searchSongList: searchList, //获取数据数组
zhida: data.data.zhida, //存放歌手属性的对象
searchLoading: true //把"上拉加载"的变量设为false，显示
});
//没有数据了，把“没有数据”显示，把“上拉加载”隐藏
}else{
that.setData({
searchLoadingComplete: true, //把“没有数据”设为true，显示
searchLoading: false //把"上拉加载"的变量设为false，隐藏
});
}
})
},
//点击搜索按钮，触发事件
keywordSearch: function(e){
this.setData({
searchPageNum: 1, //第一次加载，设置1
searchSongList:[], //放置返回数据的数组,设为空
isFromSearch: true, //第一次加载，设置true
searchLoading: true, //把"上拉加载"的变量设为true，显示
searchLoadingComplete:false //把“没有数据”设为false，隐藏
})
this.fetchSearchList();
},
//滚动到底部触发事件
searchScrollLower: function(){
let that = this;
if(that.data.searchLoading && !that.data.searchLoadingComplete){
that.setData({
searchPageNum: that.data.searchPageNum+1, //每次触发上拉事件，把searchPageNum+1
isFromSearch: false //触发到上拉事件，把isFromSearch设为为false
});
that.fetchSearchList();
}
}
})위 내용은 WeChat 애플릿에서 페이징 드롭다운 로딩을 구현하기 위한 예제 코드의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!
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