如何在缩放后将视图位置重置为原点 [英] how to reset the view position to origin after scale

问题描述

我的应用程序中有两个视图，viewA（绿色）和subviewB（红色）。我的应用程序的初始状态如下：

There's two views in my app, viewA(green) and subviewB(red). The initial state of my app is as following:

我使用以下代码更改viewA的转换：

I use the following code to change the transform of viewA:

CGFloat scale = 0.4;
self.viewA.layer.sublayerTransform = CATransform3DMakeScale(scale, scale, 1);

因此，子视图B被缩放和翻译

as a result, the subviewB is scaled and translated

但是我的应用程序有一个问题：我需要subViewB仍然在viewA的左上角，但是subviewB看着移动到viewA的中心，这很奇怪，subviewB的原点仍然是（0,0），是什么我可以将subviewB移动到左上角吗？

but there's a problem for my app: I need the subViewB is still at the top-left corner in viewA, but subviewB is look at moved to center of viewA, it's weird that the origin point of subviewB is still (0,0), what can I do to move the subviewB to top-left corner?

推荐答案

只需尝试给出的代码，

subviewB.transform = CGAffineTransformScale(test.transform, scale, scale);

它会起作用：）

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