需求:

1.日常我们在切控件圆角时会遇到想切任意圆角?

2.切过圆角带边框和不带边框的选择?

那么今天我们就用Objective-C和Swift都给它实现了:

OC代码:

UILabel *myLabel = [[UILabel alloc]initWithFrame:CGRectMake(100, 100, 200, 70)];

myLabel.text = @"Hi,小韩哥!";

myLabel.font = [UIFont systemFontOfSize:20.0];

myLabel.textAlignment = NSTextAlignmentCenter;

[self.view addSubview:myLabel];

CGFloat radius = 21.0f;

UIBezierPath * path = [UIBezierPath bezierPathWithRoundedRect:myLabel.bounds byRoundingCorners:UIRectCornerTopRight|UIRectCornerBottomRight cornerRadii:CGSizeMake(radius, radius)];

CAShapeLayer * mask = [[CAShapeLayer alloc] init];

mask.lineWidth = 5;

mask.lineCap = kCALineCapSquare;

// 带边框则两个颜色不要设置成一样即可

mask.strokeColor = [UIColor redColor].CGColor;

mask.fillColor = [UIColor yellowColor].CGColor;

mask.path = path.CGPath;

[myLabel.layer addSublayer:mask];

Swift代码:

override func viewDidLoad() {

super.viewDidLoad()

view.addSubview(myLabel);

myLabel.layer.addSublayer(myLayer);

}

private lazy var myLabel:UILabel = {

let label = UILabel.init(frame: CGRect.init(x: 100, y: 100, width: 200, height: 70));

label.text = "Hi,小韩哥!";

label.textAlignment = .center;

return label;

}()

private lazy var myLayer:CAShapeLayer = {

let path = UIBezierPath.init(roundedRect: self.myLabel.bounds, byRoundingCorners: [.topRight , .bottomRight] , cornerRadii: self.myLabel.bounds.size);

let layer = CAShapeLayer.init();

layer.path = path.cgPath;

layer.lineWidth = 5;

layer.lineCap = kCALineCapSquare;

layer.strokeColor = UIColor.red.cgColor;

// 注意直接填充layer的颜色，不需要设置控件view的backgroundColor

layer.fillColor = UIColor.yellow.cgColor;

return layer;

}()

效果:

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