在drawRect中旋转UIImage

Question

我有以下代码,在调用drawRect时显示图像.

  UIImage *sourceImage = [UIImage imageNamed:@"icon.png"];    


CGRect rect = CGRectMake(12.5, 12.5, 
                         sourceImage.size.width, 
                         sourceImage.size.height);

[sourceImage drawInRect:rect];

如何在绘制之前将其旋转几度,我读到的所有内容都需要它在一个看起来很重的drawRect中的ImageView中

Answer 1

UIImage *image = [UIImage imageNamed:@"icon.png"];
UIImageView *imageView = [ [ UIImageView alloc ] initWithFrame:CGRectMake(0.0, 0.0, image.size.width, image.size.height) ];
imageView.image = image;
[self addSubview:imageView];
CGAffineTransform rotate = CGAffineTransformMakeRotation( 1.0 / 180.0 * 3.14 );
[imageView setTransform:rotate];