「小程序JAVA实战」小程序视频列表到详情功能（58）

转自：https://idig8.com/2018/09/23/xiaochengxujavashizhanxiaochengxushipinliebiaodaoxiangqinggongneng57/

目前直接展示的都是详情页面，现在需要完成通过详情可以直接跳转到首页，通过首页点击某个视频，可以跳转到某个视频详情中。源码https://github.com/limingios/wxProgram.git 中No.15

修改首页功能

通过block 索引的方式找到点击的对应视频列表中的其中一个传递给详情页面

const app = getApp()

Page({
  data: {
    // 用于分页的属性
    totalPage: 1,
    page: 1,
    videoList: [],
    screenWidth: 350,
    serverUrl: "",
    searchValue:""
  },

  onLoad: function (params) {
    var me = this;
    var screenWidth = wx.getSystemInfoSync().screenWidth;
    me.setData({
      screenWidth: screenWidth,
    });

    var searchValue = params.searchValue;
    var isSaveRecord = params.isSaveRecord;
    if (isSaveRecord == null || isSaveRecord == "" || isSaveRecord == undefined){
      isSaveRecord = 0;
    }

    me.setData({
      searchValue: searchValue,
    });

    // 获取当前的分页数
    var page = me.data.page;
    me.getAllVideosList(page, isSaveRecord);
  },

  getAllVideosList: function (page, isSaveRecord){
    var me = this;
    var serverUrl = app.serverUrl;
    wx.showLoading({
      title: '请等待，加载中...',
    });

    wx.request({
      url: serverUrl + '/video/showAll?page=' + page + "&isSaveRecord =" + isSaveRecord,
      method: "POST",
      data:{
        videoDesc: me.data.searchValue
      },
      success: function (res) {
        wx.hideLoading();
        wx.hideNavigationBarLoading();
        wx.stopPullDownRefresh();

        console.log(res.data);

        // 判断当前页page是否是第一页，如果是第一页，那么设置videoList为空
        if (page === 1) {
          me.setData({
            videoList: []
          });
        }

        var videoList = res.data.data.rows;
        var newVideoList = me.data.videoList;

        me.setData({
          videoList: newVideoList.concat(videoList),
          page: page,
          totalPage: res.data.data.total,
          serverUrl: serverUrl
        });

      }
    })
  },

  onPullDownRefresh: function (params) {
    var me = this;
    wx.showNavigationBarLoading();
    me.getAllVideosList(1,0);

  },

  onReachBottom: function (params){
    var me = this;
    var currentPage = me.data.page;
    var totalPage = me.data.totalPage;

    //判断当前页数和总页数是否相等，如果相同已经无需请求
    if (currentPage == totalPage){
      wx.showToast({
        title: '已经没有视频啦~',
        icon:"none"
      })
      return;
    }
    var page = currentPage+1;
    me.getAllVideosList(page,0);

},
  showVideoInfo:function(e){
    var me = this;
    var videoList = me.data.videoList;
    var arrIndex = e.target.dataset.arrindex;
    var videoInfo = JSON.stringify(videoList[arrIndex]);
    wx.redirectTo({
      url: '../videoInfo/videoInfo?videoInfo=' + videoInfo,
    })

  }

})

详情页面获取传递过来的内容复制src

var videoUtils = require('../../utils/videoUtils.js')
const app = getApp()
Page({

  data: {
    cover:'cover',
    videoContext:"",
    videoInfo:{},
    videId:'',
    src:''
  },

  showSearch:function(){
    wx.navigateTo({
      url: '../videoSearch/videoSearch',
    })
  },
  onLoad:function(params){
    var me = this;
    me.videoContext = wx.createVideoContext('myVideo', me);
    var videoInfo = JSON.parse(params.videoInfo);
    me.setData({
      videId: videoInfo.id,
      src: app.serverUrl + videoInfo.videoPath,
      videoInfo: videoInfo
    })

  },
  showIndex:function(){
    wx.redirectTo({
      url: '../index/index',
    })
  },

  onShow:function(){
    var me = this;
    me.videoContext.play();
  },
  onHide:function(){
    var me = this;
    me.videoContext.pause();
  },
  upload:function(){
    videoUtils.uploadVideo();
  }
})

PS： 页面的跳转传值在html和jsp开发中也比较普遍，千万不要有老铁通过缓存的方式传值，可以是可以但是不清晰了。