Update canvasPutImageData.md

1b4e8c1b · 雪洛 · d1819285 · 1b4e8c1b
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docs/api/canvas/canvasPutImageData.md docs/api/canvas/canvasPutImageData.md +1 -1

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--- a/docs/api/canvas/canvasPutImageData.md
+++ b/docs/api/canvas/canvasPutImageData.md
@@ -19,7 +19,7 @@
 **示例代码**

 ```javascript
-const data = new Uint8ClampedArray([255, 0, 0, 1])
+const data = new Uint8ClampedArray([255, 0, 0, 255])
 uni.canvasPutImageData({
  canvasId: 'myCanvas',
  x: 0,