最近有一个需求:一个视图下面两个角需要圆角,而上面两个角不需要。
可以使用UIBezierPath和CAShapeLayer结合实现
1
|
+ (UIBezierPath *)bezierPathWithRoundedRect:(CGRect)rect byRoundingCorners:(UIRectCorner)corners cornerRadii:(CGSize)cornerRadii;
|
参数corners指定了想要需要成为圆角的角。可选值为:
1 2 3 4 5 6 7
|
typedef NS_OPTIONS(NSUInteger, UIRectCorner) { UIRectCornerTopLeft = 1 << 0, UIRectCornerTopRight = 1 << 1, UIRectCornerBottomLeft = 1 << 2, UIRectCornerBottomRight = 1 << 3, UIRectCornerAllCorners = ~0UL };
|
使用示例:
1 2 3 4 5 6 7 8 9
|
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 50, 50)]; view.backgroundColor = [UIColor redColor]; [self.view addSubview:view]; UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:view.bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight cornerRadii:CGSizeMake(10, 10)]; CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init]; maskLayer.frame = view.bounds; maskLayer.path = maskPath.CGPath; view.layer.mask = maskLayer;
|
如果需要将UIView的4个角全部都为圆角,做法相当简单,只需设置其Layer的cornerRadius属性即可。
近期评论