修改图片导致黑屏问题

index/index.js

@@ -40,7 +40,7 @@ Page({
         const canvas = res[0].node
         this.drawCanvas._init({
           width, height, canvas, dicTypePath: this.data.dicTypePath[0], callBack: () => {
-            this.onChange({ target: { dataset: { item: this.data.list[1] } } })
+            this.onChange({ target: { dataset: { item: this.data.list[0] } } })
           }
         })
       })