如何使用修复点旋转UIIMageVIew？ [英] how to rotate UIIMageVIew with fix point?

问题描述

我想在角度上旋转图像。但我想用固定点旋转图像。如何设置此修复点？

I want to rotate image on angle.But i wnt to rotate image with fix point.How can i set this fix point?

推荐答案

设置视图的图层的锚点，它在视图 - 局部坐标中从0到1.也就是说，左上角是0,0，右下角是1,1。

Set the view's layer's anchorpoint, which is in view-local coordinates from 0 to 1. That is, the top left is 0,0 and the bottom right is 1,1.

例如，默认是围绕中心旋转：

For example, the default is to rotate around the center:

imageView.layer.anchorPoint = CGPointMake(.5,.5);

如果你想围绕原点轮换：

If you want to rotate around the origin:

imageView.layer.anchorPoint = CGPointMake(0,0);

或中右边缘：

imageView.layer.anchorPoint = CGPointMake(1,.5);

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