javascript - vue.js watch 监听以对象存取的数据，不能取到具体的值？-PHP中文网问答

handleRowHandle(row){ 
            var startPoint = [];
            startPoint.push(row.StartLONG);
            startPoint.push(row.StartLAT);

            var endPoint = [];
            endPoint.push(row.EndLONG);
            endPoint.push(row.EndLAT);
            
            this.mapoint.length = 0;
            this.mapoint.push(startPoint);
            this.mapoint.push(endPoint);
         },

事件获取坐标值。

绑定。传给子组件。

  export default{
            name:'amap',
            data:function(){
                return {
                    positions:[],
                }
            },
            props:['childmapoint'],
            mounted: function () { 
                console.log("jjjjjjj")
                console.log(this.childmapoint)
            //地图初始化  
            this.map = new AMap.Map(this.$el, {
                resizeEnable: true,
                zoom: 12,
            })           
        },
    
        watch:{
            childmapoint:function(){
                console.log(this.childmapoint)
                
                //清除所有的地图覆盖物
                this.map.clearMap();
                this.positions = this.childmapoint;
                for(let i=0;i


这种方式可以传值。
我把点击事件获取指的方式。变成了：
 handleRowHandle(row){
              console.log(row);
                 this.mapValueObj.EventTypeObj = row.EventType;
                 this.mapValueObj.PlateNumberObj = row.PlateNumber;
                 this.mapValueObj.StartTimeObj = row.StartTime;
                 this.mapValueObj.StartMessageObj = row.StartMessage;
                 this.mapValueObj.EndTimeObj = row.EndTime;
                 this.mapValueObj.EndMessageObj = row.EndMessage;
                
             var startPoint = [];
             startPoint.push(row.StartLONG);
             startPoint.push(row.StartLAT);

             var endPoint = [];
             endPoint.push(row.EndLONG);
             endPoint.push(row.EndLAT);
            
             var mapoint = [];
             mapoint.length = 0;
             mapoint.push(startPoint);
             mapoint.push(endPoint);
             this.mapValueObj.mapointObj = mapoint;
            console.log(this.mapValueObj)

          },
变成了传递对象。


子组件
       name:'amap',
            data:function(){
                return {
                    positions:[],
                }
            },
            props:['childmapoint'],
            mounted: function () { 
            //地图初始化  
            this.map = new AMap.Map(this.$el, {
                resizeEnable: true,
                zoom: 12,
            })           
        },
          watch:{
            childmapoint:function(){
                //清除所有的地图覆盖物
                this.map.clearMap();
                this.positions = this.childmapoint.mapointObj;
                for(let i=0;i

传值不成功？问题出在哪？