微信小程序中的列表渲染

小程序项目

代码涉及的主要文件有：

1. app.json
2. pages/index/index.wxml
3. pages/index/index.wxss
4. pages/index/index.js

app.json

{
    
  "pages": [
    "pages/index/index"
  ],
  "window": {
    
    "navigationBarBackgroundColor": "#971a22",
    "navigationBarTitleText": "首页",
    "navigationBarTextStyle": "white"
  },
  "style": "v2",
  "sitemapLocation": "sitemap.json"
}

pages/index/index.wxml

<view class="container">
  <swiper class="bannerContainer" autoplay indicator-dots indicator-color="#971a22" indicator-active-color="ivory">
    <swiper-item wx:for="{
     {bannerList}}" wx:key="id">
      <image src="{
     {item.pic}}"></image>
    </swiper-item>
  </swiper>
  <scroll-view class="recommendList" enable-flex scroll-x>
    <view class="recommendItem" wx:for="{
     {recommendList}}" wx:key="id">
      <image src="{
     {item.picUrl}}"></image>
      <view class="title">{
   {item.title}}</view>
    </view>
  </scroll-view>
</view>

pages/index/index.wxss

.bannerContainer image{
    
  width: 100%;
  height: 300rpx;
}
.recommendList{
    
  display: flex;
  padding: 20rpx;
}
.recommendList image{
    
  width: 200rpx;
  height: 200rpx;
  border-radius: 10rpx;
  margin-right: 10rpx;
}
.recommendList .title{
    
  font-size: 26rpx;
  display: -webkit-box;
  overflow: hidden;
  text-overflow:ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

pages/index/index.js

Page({
    
  data:{
    
    bannerList:[],
    recommendList:[]
  },
  onLoad(){
    
    this.getBannerList();
    this.getRecommendList();
  },
  getBannerList(){
    
    const result = [
      {
    pic: "http://p1.music.126.net/N-7H0QxkjcnqNfQo7Prx9g==/109951167582698387.jpg", id: 146917329},
      {
    pic: "http://p1.music.126.net/CRkjYtGzVn927GVZFNcykQ==/109951167582707134.jpg", id: 146972047},
      {
    pic: "http://p1.music.126.net/UCpvQwegTjx-_ecHDDrViQ==/109951167583920308.jpg", id: 1958588078},
      {
    pic: "http://p1.music.126.net/5hxwliN1A-ocfo1y8Rl-LA==/109951167583325800.jpg", id: 146939174},
      {
    pic: "http://p1.music.126.net/i9A9PG9tvDqkuRekCR8EgQ==/109951167583029047.jpg", id: 1957532468},
      {
    pic: "http://p1.music.126.net/es8XZbDQWrNjA_VyW7XJeQ==/109951167583025966.jpg", id: 146848766},
      {
    pic: "http://p1.music.126.net/7YCWTLNpIqzdaYD_WrB6qA==/109951167583039220.jpg", id: 146627102},
      {
    pic: "http://p1.music.126.net/u2Y1A90S5fh3R4qVhKrIGQ==/109951167582728056.jpg", id: 223052482},
      {
    pic: "http://p1.music.126.net/Jn1zsklqb_qmPfoJsooJ2Q==/109951167582726188.jpg", id: 1957961053},
      {
    pic: "http://p1.music.126.net/lsKgZUDW-4C8SRbQciZvmA==/109951167583045066.jpg", id: 1955958008}
    ]
    this.setData({
    bannerList:result})
  },
  getRecommendList(){
    
    const result = [
      {
    id: 494479726, picUrl: "https://p2.music.126.net/58ox3zVEmosSrdLaKj6x5w==/109951162827155600.jpg", title: "后摇MV | 原来后摇也能视觉化"},
      {
    id: 135595185, picUrl: "https://p2.music.126.net/11ZHf0G9FQzWNi-8sFzCmw==/109951164541050373.jpg", title: "Acid Jazz酸爵士—爵士乐中的“酸性”融合"},
      {
    id: 114846926, picUrl: "https://p2.music.126.net/GTf1b1G2dAs1SleurIfcJg==/3399689953594431.jpg", title: "歌名后缀大科普"},
      {
    id: 113780871, picUrl: "https://p2.music.126.net/qxUWSKhrd1UWME8oAYTMFQ==/109951164497486331.jpg", title: "「Cool Jazz」冷爵士让你全身心放松"},
      {
    id: 2962407224, picUrl: "https://p2.music.126.net/NW1GEN3sruiLpT4AZrdDFw==/109951165669533032.jpg", title: "『英伦女声』遗世而独立的不列颠玫瑰"},
      {
    id: 2107922801, picUrl: "https://p2.music.126.net/b--QkIcFfdxz_DryW55ZfA==/109951163165101034.jpg", title: "声光美学 I 经典电影中的古典配乐集"},
      {
    id: 78669437, picUrl: "https://p2.music.126.net/AfN_yyi-fQe8POTMKJFjAA==/7957165650297535.jpg", title: "美剧中的神级插曲"},
      {
    id: 3116763088, picUrl: "https://p2.music.126.net/MSom1XSXqt5K9ArZlJ29CQ==/109951164608648583.jpg", title: "音乐的力量 I 文艺复兴时期的世俗情歌"},
      {
    id: 101354498, picUrl: "https://p2.music.126.net/dmj9iqz8MsD_sCd1xBF0WA==/7918682744429845.jpg", title: "时尚运动•必备节奏"},
      {
    id: 739403485, picUrl: "https://p2.music.126.net/RPilW2ADtU91CK3qkVPizA==/18720284976441185.jpg", title: "弦外有声——活力小提琴"}
    ]
    this.setData({
    recommendList:result})
  }
})

小结

记住四个指令就行：

1. wx:for，绑定一个数组。
2. wx:key。唯一的字符串或数值。要么是数组元素item的某个属性，要么是*this（此时，item本身是一个唯一的字符串或数值）。
3. wx:for-item。默认数组当前元素的变量名为item，可以使用wx:for-item重新指定当前元素的变量名。
4. wx:for-index。默认数组当前元素的下标变量名为index，可以使用wx:for-index重新指定当前元素的下标变量名。

相关链接

【微信小程序】wxml模板