iphone下让方形的图片圆角显示

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UIImageView * headerImage = [[UIImageView alloc] initWithFrame:CGRectMake(10.0, 10.0, 64.0, 64.0)];headerImage.image = contactPhoto;CALayer * layer = [headerImage layer];[layer setMasksToBounds:YES];[layer setCornerRadius:10.0];[layer setBorderWidth:1.0];[layer setBorderColor:[[UIColor blackColor] CGColor]];[contactHeader addSubview:headerImage];?

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记得头文件:#import <QuartzCore/QuartzCore.h>