Component({
  /*** 页面的初始数据***/
  data: {
    msgStatus:false,
    countDownNum:3, //默认3秒后跳转
  },
  methods: {
     show:function (){
        this.setData({msgStatus:true,countDownNum:3})
        this.cut_down();
     },
     hide:function (){
        this.setData({msgStatus:false})
     },
     //定时器跳转
     cut_down(){
         if(this.data.countDownNum>0){
             var a=this.data.countDownNum-1;
             this.setData({countDownNum:a})
             setTimeout(()=>{
                 this.cut_down();
             },1000);
         }else{
           this.hide();
           this.triggerEvent('childFun');
         }
     }
  }


})