如何在imageview ios7中獲取圓形圖像

Question

如何從UIImage獲取圓形圖像並將其顯示在圖像視圖上。圖像應該類似於IOS7中顯示的圖像調用歷史記錄

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;