vue实现新闻展示页的步骤详解

var returndata={
    swipertime:swipertime,
    demoData: [],
    demoData2:[],
    message:'正在加载数据',
    iscrollaction:false,
    token:'{pigcms:$token}',
    cdn:"{pigcms::C('cdn_images')}",
    param:{
      api_url:"{pigcms::C('api_weixin')}",
      local_url:"{pigcms::C('site_url')}",
      classid: -1,
      startnum: 0 ,
      other:''
    },
    ajax_status:false,
    huadong:true,
  }
  //组件开始的时候，先注销掉上一个组件的滑动，然后查看缓存里面有没有数据，如果有缓存就进入缓存里面，如果没有，就重新加载
  var create=function() {
    var that = this;
    if (that.myScroll){
      that.myScroll.destroy(); //把滑动注销掉
    }
    var session_name=this.$route.path;
    if(sessionStorage[session_name]){ //说明缓存里面有
      that.session_data();
    }else{
      that.ajax_data();
    }
  };
//有缓存的处理办法
session_data:function () {
      var that = this;
      var session_name=this.$route.path;
      //把缓存内容取出来
      var session_data= JSON.parse(sessionStorage[session_name]);
      for (x in session_data){
        switch(x){
          case 'data1':
            that.demoData=session_data[x];
            break;
          case 'data2':
            that.demoData2=session_data[x];
            break;
          case 'scroll_y':
            var scroll_y=session_data[x];
            break;
          case 'iscrollaction':
            that.iscrollaction=session_data[x];
            break;
          case 'startnum':
            that.param.startnum=session_data[x];
            break;
          case 'other':
            that.param.other=session_data[x];
            break;
          case 'message':
            that.message=session_data[x];
            break;
          case 'classid':
            that.param.classid=session_data[x];
            break;
        }
      }
      Vue.nextTick(function () {
        //初始化滚动插件
        that.myScroll = new IScroll('#wrapper', {
          mouseWheel: true,
          wheelAction: 'zoom',
          click: true,
          scrollX: false,
          scrollY: true,
          startY:scroll_y,//滑动定位到原来的位置
        });
        //滚动监听
        that.myScroll.on('scrollStart',that.showbox);//滚动监听,1000
        that.myScroll.on('scrollEnd',that.scrollaction);//滚动监听,1000
        that.myScroll.refresh();
      })
    },
//没有缓存重新加载
 ajax_data:function(){
      var that = this;
      if (this.$route.params.id != ''){
        that.param.classid=this.$route.params.id;
      }else{
        that.param.classid=-1;
      }
      that.param.startnum=0;//初始化数据
      var url = that.param.api_url + ******' + that.token + '&classid=' + that.param.classid + '&offset=' + that.param.startnum;//接口url
      that.$http.jsonp(url).then(function (response) {
        var res = response.data; //取出的数据
        this._data.demoData2 = res.new;
        this._data.demoData = res.data;
        this._data.param.other = res.other ;
        var listdata = res.data;  //数据
        var code = res.code; //状态值
        if (res.other !== 1) {
          if (code == '20001') {
            if(listdata.length == 10){
              that.iscrollaction = true;
              that.message='正在加载数据';
            }else{
              that.iscrollaction = false;
              that.message='没有更多资讯';
            }
          }else if (code == '20002') {
            that.iscrollaction=false;
            that.message='没有更多资讯';
          } else if (code == '40001' || code == '40002') {
            that.message='访问错误';
            that.iscrollaction=false;
          }else{
            that.message='暂无数据';
            that.iscrollaction=false;
          }
        } else {
          that.iscrollaction=false;
        }
        that.param.startnum = listdata.length;
        Vue.nextTick(function () {
          //初始化滚动插件
          that.myScroll = new IScroll('#wrapper', {
            mouseWheel: true,
            wheelAction: 'zoom',
            click: true,
            scrollX: false,
            scrollY: true,
          });
          //滚动监听
          that.myScroll.on('scrollStart',that.showbox);//滚动监听,1000
         that.myScroll.on('scrollEnd',that.scrollaction);//滚动监听,1000
          //把数据放在缓存里面
          var session_name=that.$route.path;
          var session_all={};
          session_all.name=session_name;
          session_all.data1=that._data.demoData;
          session_all.data2=that._data.demoData2;
          session_all.scroll_y = 0;
          session_all.iscrollaction=that.iscrollaction;
          session_all.startnum= that.param.startnum;
          session_all.other= that.param.other;
          session_all.message= that.message;
          session_all.classid= that.param.classid;
          var session_all = JSON.stringify(session_all);
          sessionStorage[session_name]=session_all;
        })
      }, function (response) {
        //取消加载效果
        loadingToast.css('display', 'none');
        that.message='服务器维护，请稍后重试';
      });
    },