typescript对echarts中series的symbol动态改变

Typescript对类型要求比较严，所以 只能通过 (series as echarts.ScatterSeriesOption).symbol的方式改变图标

	if (myChart != null) {

		console.log(`****************** `)
		const currentOption = myChart.getOption() as echarts.EChartsOption;
		console.log(currentOption.series)
		if (Array.isArray(currentOption.series)) {
			currentOption.series.forEach((series: echarts.SeriesOption) => {
				if (series.name === "bb") {

					// 如果是折线图，可以更新 symbol 属性
					if (series.type === 'scatter') {
						(series as echarts.ScatterSeriesOption).symbol = 'image://' + TyreImg;; // 修改标记符号
						//(series as echarts.LineSeriesOption).symbolSize = 12; // 修改标记符号大小
					}
				}
			}); 
		}

		myChart.setOption(currentOption)
 

	}