如何在 iPhone 中以编程方式将图像旋转 90 度? [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 中以编程方式将图像旋转 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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