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The knowledge points of this article "how to achieve WeChat Mini Programs Picture Compression function" are not quite understood by most people, so the editor summarizes the following contents to you. The content is detailed, the steps are clear, and it has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "WeChat Mini Programs picture compression function how to achieve" article.

Specific operation steps:

1. Select the camera picture through the wx.chooseImage interface.

2. Get the image information (length, width, type) through the wx.getImageInfo API.

3. Calculate the compression ratio and the length and width of the final picture.

4. Create the canvas drawing context and draw the final picture.

5. Export the canvas content to an image through the wx.canvasToTempFilePath interface and get the image path.

The code implementation is as follows:

Wxml file

Js file

Data: {cWidth: 0; cHeight: 0;} data: {cWidth: 0; cHeight: 0;} the above is about "how to achieve WeChat Mini Programs's image compression function". I believe we all have a certain understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please pay attention to the industry information channel.

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