微信小程序-今日头条案例

Posted 2020-08-12

github地址:   https://github.com/HowName/toutiao

项目为仿今日头条,使用了百度ApiStore接口查询数据,使用微信组件/api有 封装请求方法,底部tab,启动页动画,loading,scroll-view,swiper,列表页支持上下拉加载更多

效果图:

 

启动欢迎页,几行代码可实现旋转与缩放:

 //flash.js 
 onReady:function(){
      // 页面渲染完成
      var that = this,duration = 1500;
      var animation = wx.createAnimation({
          duration: duration,
      });

      //step() 方法表示一组动画的结束
      animation.scale(2).rotate(360).step();
      animation.scale(1).step();
  
      this.setData({
          animationData : animation.export()
      });

      var timestamp = new Date().getTime();
      setTimeout(function(){
        wx.redirectTo({
          url: ‘../index/index?time=‘+timestamp
        })
      },duration*2.5);

  },

　　

//flash.wxml
<image class="flash-img" animation="{{animationData}}" src="{{src}}" ></image>

　　

 

网络请求方法:

//app.js
  req: function(url,data,param){
    var requestData = {
      url: url,
      data: typeof data == ‘object‘ ? data : {},
      method: typeof param.method == ‘string‘ && param.method.length > 0 ? param.method.toUpperCase() : ‘GET‘,
      header: typeof param.header == ‘object‘ ? param.header : {},
      success: function(res) {
      	typeof param.success == ‘function‘ && param.success(res);
      },
      fail: function(res){
        typeof param.fail == ‘function‘ && param.fail(res);
      },
      complete: function(res){
        typeof param.complete == ‘function‘ && param.complete(res);
      }
    };
    wx.request(requestData);
  },

 

列表页:

//index.js
var app = getApp(),currentPage = 1;
const URL = "http://apis.baidu.com/showapi_open_bus/channel_news/search_news";

Page({
  data:{
    imgUrls: [
      ‘http://img02.tooopen.com/images/20150928/tooopen_sy_143912755726.jpg‘,
      ‘http://img06.tooopen.com/images/20160818/tooopen_sy_175866434296.jpg‘,
      ‘http://img06.tooopen.com/images/20160818/tooopen_sy_175833047715.jpg‘
    ],
    toView: "",
    loadingHidden:true,
    renderData:[],
  },
  onLoad:function(options){
    this.loadDataFromServer();
  },
  //api读取数据
  loadDataFromServer: function(){
    var that = this;
    that.changeLoadingStatus(false);
    app.req(URL,{
      page : currentPage,
      needContent : 1,
    },{
      header: { apikey: app.globalData.apikey },
      success:function(resp){
        console.log(resp);
        console.log("成功加载页数 "+currentPage);
        var tempData = resp.data.showapi_res_body.pagebean.contentlist;
        var toViewId = currentPage % 2 == 0 ? "top-id" : "top-id2"; //需要改变值页面才会重新渲染
        that.setData({
           //renderData: that.data.renderData.concat(tempData),  合并数组容易超出长度,无法做到无限加载
           renderData: tempData,
           toView: toViewId,
        });
        that.changeLoadingStatus(true);
      }
    });

  },
  //加载上一页或者下拉刷新
  refresh:function(e){
      currentPage = currentPage > 1 ? --currentPage : 1;
      this.loadDataFromServer();
  },
  //加载下一页
  loadMore:function(e){
      ++currentPage;
      this.loadDataFromServer();
  },
  //改变loading状态
  changeLoadingStatus: function(bool){
    this.setData({
      loadingHidden: bool
    });
  },
  onReady:function(){
    // 页面渲染完成
    wx.setNavigationBarTitle({
      title: ‘列表‘
    });
  },
  onShow:function(){
    // 页面显示
  },
  onHide:function(){
    // 页面隐藏
  },
  onUnload:function(){
    // 页面关闭
  }
});

 

//index.wxml
<loading hidden="{{loadingHidden}}"> 
    加载中...
</loading>

<scroll-view scroll-y="true" style="height: 100%;" scroll-into-view="{{toView}}" upper-threshold="5" lower-threshold="5" bindscrolltoupper="refresh" bindscrolltolower="loadMore">

    <swiper indicator-dots="true" id="swiper-view" autoplay="true" interval="2000">
        <block wx:for="{{imgUrls}}">
            <swiper-item>
                <image src="{{item}}" width="100%" height="150"/>
            </swiper-item>
        </block>
    </swiper>

    <view id="top-id"> </view>
    <view id="top-id2"> </view>
    <block wx:for="{{renderData}}">
        <view class="container">  
            <view class="title">
                <text class="title-text">{{item.title}}</text>
            </view>
        
            <view class="images"  wx:if="{{item.imageurls.length > 0}}">
                <block wx:for="{{item.imageurls}}" wx:for-item="imgItem" wx:for-index="imgIndex">
                    <image wx:if="{{imgIndex <= 2}}"  src="{{imgItem.url}}"></image>
                </block>
            </view>
            <view class="source">{{item.source}}  {{item.pubDate}}</view>
        </view>
    </block>
</scroll-view>

 完!