How to programmatically rotate image by 90 Degrees in iPhone?(如何在 iPhone 中以编程方式将图像旋转 90 度?)
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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