ios - 如何在 imageview ios7 中获取圆形图像

Question

如何从 UIImage 获取圆形图像并将其显示在 ImageView 上。该图像应该类似于 IOS7 调用历史中显示的图像

Answer 1

- (UIImage *)getRoundedRectImageFromImage :(UIImage *)image onReferenceView :  
(UIImageView*)imageView withCornerRadius :(float)cornerRadius
{
UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, NO, 1.0);
[[UIBezierPath bezierPathWithRoundedRect:imageView.bounds
                            cornerRadius:cornerRadius] addClip];
[image drawInRect:imageView.bounds];
UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

return finalImage;
}                                                                                                     And call the method like this

imageView.image = [self getRoundedRectImageFromImage:image
                                         onReferenceView:
imageView withCornerRadius:imageView.frame.size.width/2];
imageView.clipsToBounds=YES;
imageView.layer.masksToBounds = YES;