如何以编程方式设置的某个角度旋转图像? [英] How to rotate an image by some angle which is set by programmatically?

问题描述

当前，我正在从iPad图像库中获取随机图像，并将其显示在UIImageView中.我想将其旋转一些可以设置的预定义角度.

Currently I am fetching a random image from the iPad image library and showing it in UIImageView. I want to rotate it by some predefined angle which I can set.

我不希望任何基于触摸的旋转.我怎样才能做到这一点?

I don't want any touch based rotation. How can I do that?

推荐答案

为什么不只是旋转UIImageView? 包括QuartzCore框架.

Why not just rotate the UIImageView? Include QuartzCore framework.

#import <QuartzCore/QuartzCore.h>

self.imageView.layer.affineTransform = CGAffineTransformMakeRotation(angle)

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