custom-tab-bar: 调整 getBoundingClientRectAsync

pages/component/canvas/canvas/ball.uvue

@@ -188,7 +188,7 @@
       // component: this,
       success: (context : CanvasContext) => {
         const renderingContext = context.getContext('2d')!;
-        const canvas = renderingContext!.canvas;
+        const canvas = renderingContext.canvas;
 
         const dpr = uni.getDeviceInfo().devicePixelRatio ?? 1;
         canvas.width = canvas.offsetWidth * dpr

pages/template/custom-tab-bar/custom-tab-bar.uvue

@@ -75,7 +75,9 @@
     },
     onReady() {
       // this.setSelectedIndex(0)
-      this.tabViewHeight = (this.$refs["tabview"] as UniElement).getBoundingClientRect().height
+      (this.$refs["tabview"] as UniElement).getBoundingClientRectAsync().then((res: DOMRect) => {
+        this.tabViewHeight = res.height
+      });
     },
     onUnload() {
       uni.$off('tabchange', this.onTabPageEvent)