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Most people do not understand the knowledge of this article "how to adapt Mini Program to various mobile phone sizes", so the editor summarizes the following contents for 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 "Mini Program how to adapt to various mobile phone sizes" article.

Problem solved: the operation in js, such as canvas and animation, defaults to px rather than rpx, and cannot be adapted according to the phone screen.

Effect achieved: make canvas and animation self-adaptive to rpx on mobile phones with different resolutions

To achieve the idea, get the width and height of the component node, and then fill the width and height of the component rpx unit into the px unit of the canvas, through the

Wx.createSelectorQuery () .select ('# canvas-container') .boundingClientRect (function (rect) {

Var width = rect.width / / Node width Node height is rect.height

}) .exec ()

Getting the width and height of the rpx units of the node is automatically converted to px units.

Wx.createSelectorQuery () .select ('# canvas-container') .boundingClientRect (function (rect) {

Var width = width of rect.width/2 / / Node

}) .exec ()

To use in a canvas:

Ctx.translate (width, width)

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