//UIView+CornerRadius.h@interface UIView (CornerRadius)@property (nonatomic, assign) IBInspectable CGFloat cornerRadius;@end
//UIView+CornerRadius.m@implementation UIView (CornerRadius)- (void)setCornerRadius:(CGFloat)cornerRadius{ self.layer.cornerRadius = cornerRadius; self.layer.masksToBounds = cornerRadius > 0;}- (CGFloat)cornerRadius{ return self.layer.cornerRadius;}@en原文：http://www.cnblogs.com/superbobo/p/5231662.html