Echarts chart drawing problems and solutions

1. This warning may appear when the Echarts chart is redrawn:There is a chart instance already initialized on the dom.

Reason: When we redraw the chart, the Dom instance still exists and will be initialized repeatedly.

Solution:

// 在初始化实例之前先将实例销毁，实例销毁后就无法再被使用了，然后再重新进行初始化
that.myChart && that.myChart.dispose()

2. Click event on the mobile terminal of the chart in Echarts (line chart, histogram):

When making the h5 chart on the mobile terminal, I found that if I want to click on a certain point or column, I need to click two or more times to trigger it. Reasons to be added. . .

Solution:

this.char.getZr().on('click',params => {
    
     // 监听鼠标点击的图表区域
   const pointInPixel= [params.offsetX, params.offsetY]
   if (that.char.containPixel('grid',pointInPixel)) {
    
    
   let xIndex=that.char.convertFromPixel({
    
    seriesIndex:0},[params.offsetX, params.offsetY])[0]
    if (data[xIndex]) {
    
    
       that.newDate = data[xIndex].tradeDate.replace(/\//g,'.')
       let realNumber = data[xIndex].rtnTotal
       realNumber=realNumber+''
       var number = realNumber.split(".");
       var reg = /\d{1,3}(?=(\d{3})+$)/g
       if(number.length===1){
    
    
          realNumber = (number[0] + '').replace(reg, '$&,')
       }
       that.nowProfit = realNumber
   }
       document.getElementsByClassName('defaultDate')[0].style.background = '#f5effe'
  }
})

3. Echarts chart – > move the mouse in and cancel the small hand:

When there is no need to click to jump in the chart, when the mouse moves into the current chart, the state of the small hand changes to an arrow.

	// myChart是绘图的对象
	myChart.getZr().on('mousemove', param => {
    
    
      myChart.getZr().setCursorStyle('default')
      //  若鼠标滑过区域位置在当前图表范围内 鼠标设置为小手
      // if (radarChart.containPixel('grid', pointInPixel)) { 
	  //  radarChart.getZr().setCursorStyle('pointer')
	  // } 
    })

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