如何以编程方式在iPhone中将图像旋转90度？

Question

可能重复:
如何将UIImage旋转90度？

如何以编程方式在iPhone中将图像旋转90度？

Answer 1

//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

Answer 2

看到这个:

在Quartz中旋转图像？图像是颠倒的!(苹果手机)

 myImage.center = CGPointMake(0, 0);
 myImage.transform = CGAffineTransformMakeRotation([degreesToRadians:imageRotationFix]);