1、画布更新

src/components/canvas-preview/index.vue

@@ -4,7 +4,7 @@
     :append-to-body="visible"
     :modal="false"
     title="图片预览"
-    width="40%"
+    width="20%"
     @opened="openCanvas"
     @close="closeDialog"
     style="display: flex; align-items: center;justify-content: center;"