IOS 旋转图片代码如下：
self.MyImageView.contentMode=UIViewContentModeScaleAspectFit;
UIImage*imageDemo=[UIImageimageNamed:@"11.png"];
UIImage*newImage=[UIImageimageWithCGImage:imageDemo.CGImagescale:1orientation:UIImageOrientationLeft];
//self.MyImageView.image=[UIImage imageNamed:@"11.png"];
self.MyImageView.image=newImage;
