使my-pie返回实例

src/components/MyComponent/MyChart/my-pie.vue

@@ -23,7 +23,8 @@ export default defineComponent({
       default: null,
     },
   },
-  setup(props) {
+  emits: ['init'],
+  setup(props, ctx) {
     const defaultOption: PieOption = {
       backgroundColor: 'transparent',
       tooltip: {
@@ -54,8 +55,14 @@ export default defineComponent({
       defaultOption,
       defaultSeriesItem
     )
-    onMounted(() => initChart(props.dataset, props.option))
-    watchEffect(() => initChart(props.dataset, props.option))
+    onMounted(() => {
+      const instance: any = initChart(props.dataset, props.option)
+      instance && ctx.emit('init', instance)
+    })
+    watchEffect(() => {
+      const instance: any = initChart(props.dataset, props.option)
+      instance && ctx.emit('init', instance)
+    })
     return {
       chartRef,
     }

src/components/MyComponent/MyChart/useChartGenerate.ts

@@ -202,7 +202,10 @@ const useChartGenerate = <T>(
    * @param dataset 数据集
    * @param option 自定义图表配置
    */
-  const initChart = (dataset: DatasetComponentOption, option?: ECOption) => {
+  const initChart = (
+    dataset: DatasetComponentOption,
+    option?: ECOption
+  ): any => {
     if (!myChart.value) return
     const config =
       (defaultSeriesItem as any).type === 'radar'
@@ -214,6 +217,7 @@ const useChartGenerate = <T>(
         : defaultConfig(defaultOption, defaultSeriesItem, dataset)
     mergeOptions(config, option)
     myChart.value.setOption(transLinearColorOption(config), true)
+    return myChart.value
   }
 
   return { chartRef, initChart }