ios – UIView的圆顶角,并添加边框

2019年07月21日作者：佚名

我有一个类别中的以下代码进行四舍五入.我也想画边界.但边角没有显示在角落的圆角上.

这是代码

- (void) roundTopCorners:(CGFloat) radius
{
    self.layer.masksToBounds = YES;

    CGRect bounds = self.bounds;
    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight) cornerRadii:CGSizeMake(radius,radius)];

    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.frame = bounds;
    maskLayer.path = maskPath.CGPath;
    maskLayer.strokeColor = [UIColor redColor].CGColor;

    self.layer.mask = maskLayer;
}

解决方法

掩模层不被绘制,仅用于计算掩模.尝试：

-(void)roundCorners:(UIRectCorner)corners radius:(CGFloat)radius
{
    CGRect bounds = self.bounds;
    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bounds
                                                   byRoundingCorners:corners
                                                         cornerRadii:CGSizeMake(radius,radius)];

    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.frame = bounds;
    maskLayer.path = maskPath.CGPath;

    self.layer.mask = maskLayer;

    CAShapeLayer*   frameLayer = [CAShapeLayer layer];
    frameLayer.frame = bounds;
    frameLayer.path = maskPath.CGPath;
    frameLayer.strokeColor = [UIColor redColor].CGColor;
    frameLayer.fillColor = nil;

    [self.layer addSublayer:frameLayer];
}

-(void)roundTopCornersRadius:(CGFloat)radius
{
    [self roundCorners:(UIRectCornerTopLeft|UIRectCornerTopRight) radius:radius];
}

-(void)roundBottomCornersRadius:(CGFloat)radius
{
    [self roundCorners:(UIRectCornerBottomLeft|UIRectCornerBottomRight) radius:radius];
}

您当前看到的框架是UITextField的正常框架,因此将框架样式设置为none.您还必须调整插图来弥补将框架样式设置为无,通常没有插入的事实.

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