设置UIView部分圆角
UIView *view2 = [[UIView alloc] initWithFrame:CGRectMake(120, 10, 80, 80)]; view2.backgroundColor = [UIColor redColor]; [self.view addSubview:view2]; UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:view2.bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight cornerRadii:CGSizeMake(10, 10)]; CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init]; maskLayer.frame = view2.bounds; maskLayer.path = maskPath.CGPath; view2.layer.mask = maskLayer; //其中，byRoundingCorners:UIRectCornerBottomLeft |UIRectCornerBottomRight //指定了需要成为圆角的角。该参数是UIRectCorner类型的，可选的值有： * UIRectCornerTopLeft * UIRectCornerTopRight * UIRectCornerBottomLeft * UIRectCornerBottomRight * UIRectCornerAllCorners
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http://www.huangyibiao.com/ios-good-knowledge/#title-15
