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CanvasContext.drawImage()报错问题 #4091

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archerQ opened this issue Aug 6, 2019 · 7 comments
Closed

CanvasContext.drawImage()报错问题 #4091

archerQ opened this issue Aug 6, 2019 · 7 comments
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T-h5 Target - 编译到 H5 V-2 Version - 2.x

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@archerQ
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archerQ commented Aug 6, 2019

使用Canvas画图,代码大致如下:
let ctx = Taro.createCanvasContext('myCanvas', this) console.log('===图片信息==',images) let front = images.front console.log('==底图信息==', front) ctx.drawImage(front, 10, 10, 300, 400) ctx.draw()

其中front是下载下来的图片,格式为:
http://127.0.0.1:9091/f52be074-19d3-4c12-abbb-dc158975544e

报的错误如下:
Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'

有大佬知道是什么原因,怎么处理吗?求解答

@taro-bot
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taro-bot bot commented Aug 6, 2019

欢迎提交 Issue~

如果你提交的是 bug 报告,请务必遵循 Issue 模板的规范,尽量用简洁的语言描述你的问题,最好能提供一个稳定简单的复现。🙏🙏🙏

如果你的信息提供过于模糊或不足,或者已经其他 issue 已经存在相关内容,你的 issue 有可能会被关闭。

Good luck and happy coding~

@luckyadam
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在什么平台下报的错,具体错误截图看下

@archerQ
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archerQ commented Aug 7, 2019

在什么平台下报的错,具体错误截图看下

在H5中

图片

@zhongyao-x
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楼主问题解决了吗 是怎么回事?

@meiye1988
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楼主后面解决了吗 现在我遇到和你一样情况 望楼主指教下谢谢

@Link-X
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Link-X commented Apr 14, 2021

楼主后面解决了吗现在我遇到和你一样情况
用h5原生canvas api。别用小程序的就行。

@Link-X
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Link-X commented Apr 28, 2021

楼主后面解决了吗现在我遇到和你一样情况
用h5原生canvas api。别用小程序的就行。

后面h5单独写了一套。没用Taro.createCanvasContext()。

@ZakaryCode ZakaryCode added the T-h5 Target - 编译到 H5 label Jan 15, 2022
@ZakaryCode ZakaryCode added the V-2 Version - 2.x label Feb 15, 2022
@ZakaryCode ZakaryCode moved this to Done in H5 Apr 10, 2023
@ZakaryCode ZakaryCode added this to H5 Apr 10, 2023
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