miniprogram-api-promise
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20 hours ago •
wechat-miniprogram
wechat-miniprogram
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```javascript promisify(wx.canvasToTempFilePath)({ canvasId: 'waveImage' }, this).then(res => { console.log(res) }) ``` 报 `canvasToTempFilePath: fail canvas is empty` 应该是 this 对象没有传入方法中
