echarts vue项目tab切换后 当浏览器分辨率变化后 隐藏tab的echarts无法获取高度

解决办法：
监听路由 当路由跳到隐藏页面的时候 手动获取div高度 然后调用echarts的resize方法

  data () {
    return {
        myChart:null,
    }
  },
  watch:{
    $route:{
      handler(){
        let _this=this;
         var width = $("#collect").width();
         var height = $("#collect").height();
         _this.myChart.resize('null',width,height);
      },

    },
  },

画图的方法例子(方法中有给echarts图绑定点击事件的写法)：

    draw(){
      let _this=this
      _this.myChart = this.$echarts.init(document.getElementById('collect'));;
      var option = {
                tooltip : {
                    trigger: 'axis',
                     formatter: '{b0}<br /> {a0}:{c0}%'
                },
                color:['#E129F8'],
                legend: {
                    left: '10%',
                    top:'2%',
                    textStyle: {
                    fontSize: 12,
                    color: 'white'
                    }
                },
                toolbox: {
                    show : false,
                },
                calculable : true,
                xAxis : [
                    {
                        type : 'category',
                        boundaryGap : false,
                        data :_this.xData,
                        axisLine:{
                        lineStyle:{
                            color:'white',
                        }
                    }
                    }
                ],
                yAxis : [
                    {
                        type : 'value',
                      axisLine:{
                                    lineStyle:{
                                        color:'rgba(255,255,255,.1)',
                                    }
                                  },
                                  axisLabel: {
                                        color:'white'
                                  },
                                  axisTick: {
                                        show: false
                                    },
                                  splitLine:{
                                     lineStyle:{
                                        color:'rgba(255,255,255,.1)',
                                    }
                                    }
                    },
                ],
                series : [
                      {
                        name:'采集率',
                        type:'line',
                        symbol: "none",
                        smooth:true,
                        itemStyle: {normal: {  areaStyle: {
                        color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                                offset: 0,
                                color: 'rgba(225,41,248,0.7)'
                            }, {
                                offset: 1,
                                color: 'rgba(225,41,248,0)'
                            }])
                        },
                        }},
                        data:_this.dataValue
                    },
                ]
      };
                   _this.myChart.setOption(option);
                   _this.myChart.getZr().off('click')
                   _this.myChart.getZr().on('click',function (params) {
                      _this.gridData=[]
                        var pointInPixel= [params.offsetX, params.offsetY];
                        if (_this.myChart.containPixel('grid',pointInPixel)) {
                            var pointInGrid=_this.myChart.convertFromPixel({seriesIndex:0},pointInPixel);
                            var xIndex=pointInGrid[0];
                            var op=_this.myChart.getOption();
                            let month=op.xAxis[0].data[xIndex];
                            _this.dialogTableVisible = true
                            _this.getEEorNULL(month);
                        }
                    });
                    //将可以响应点击事件的范围内，鼠标样式设为pointer--------------------
                    _this.myChart.getZr().on('mousemove',function (params) {
                        var pointInPixel= [params.offsetX, params.offsetY];
                        if (_this.myChart.containPixel('grid',pointInPixel)) {
                            _this.myChart.getZr().setCursorStyle('pointer');
                        };
                    });
                    _this.myChart.on('mouseout', function (params) {
                        var pointInPixel= [params.offsetX, params.offsetY];
                        if (!myChart.containPixel('grid',pointInPixel)) {
                            myChart.getZr().setCursorStyle('default');
                        };
                    });
                   window.addEventListener('resize', function () {
                        _this.myChart.resize()
                   })
    },