From ca18e691363dd45c16b4cccf9d1791ab7a782892 Mon Sep 17 00:00:00 2001
From: wangyaqi <wangyaqi988@163.com>
Date: Sat, 14 Mar 2020 21:57:15 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20canvas=E7=BB=84=E4=BB=B6=E5=AE=BD?=
 =?UTF-8?q?=E5=BA=A6=E6=88=96=E9=AB=98=E5=BA=A6=E4=B8=BA0=E6=97=B6?=
 =?UTF-8?q?=E6=8A=A5=E9=94=99=E7=9A=84Bug=EF=BC=88question/90647=EF=BC=89?=
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---
 src/core/view/components/canvas/index.vue | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/core/view/components/canvas/index.vue b/src/core/view/components/canvas/index.vue
index 740b09859..5113f1406 100644
--- a/src/core/view/components/canvas/index.vue
+++ b/src/core/view/components/canvas/index.vue
@@ -123,10 +123,14 @@ export default {
     },
     _resize () {
       var canvas = this.$refs.canvas
-      var context = canvas.getContext('2d')
-      var imageData = context.getImageData(0, 0, canvas.width, canvas.height)
-      wrapper(this.$refs.canvas)
-      context.putImageData(imageData, 0, 0)
+      if (canvas.width > 0 && canvas.height > 0) {
+        var context = canvas.getContext('2d')
+        var imageData = context.getImageData(0, 0, canvas.width, canvas.height)
+        wrapper(this.$refs.canvas)
+        context.putImageData(imageData, 0, 0)
+      } else {
+        wrapper(this.$refs.canvas)
+      }
     },
     _touchmove (event) {
       event.preventDefault()
-- 
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