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