How to rotate UIImage(如何旋转 UIImage)
问题描述
我正在为 iPad 开发一个 iOS 应用程序.有没有办法将 UIImage 旋转 90º,然后将其添加到 UIImageView?我尝试了很多不同的代码,但都没有奏效......
I'm developing an iOS app for iPad. Is there any way to rotate a UIImage 90º and then add it to a UIImageView? I've tried a lot of different codes but none worked...
谢谢!
推荐答案
你可以旋转 UIImageView
本身:
UIImageView *iv = [[UIImageView alloc] initWithImage:image];
iv.transform = CGAffineTransformMakeRotation(M_PI_2);
或者如果你真的想改变图像,你可以使用 this回答,它有效.
Or if you really want to change image, you may use code from this answer, it works.
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