如何以图形方式在iPhone中以90度旋转图像？ [英] How to programmatically rotate image by 90 Degrees in iPhone?

问题描述

可能重复：

如何将UIImage旋转90度？

如何在iPhone中以程序化的方式旋转图像90度？

How to programmatically rotate image by 90 Degrees in iPhone?

推荐答案

//create rect
UIImageView *myImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"my_image.png"]];

//set point of rotation
myImageView.center = CGPointMake(100.0, 100.0);

//rotate rect
myImageView.transform = CGAffineTransformMakeRotation(M_PI_2); //rotation in radians

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