如何为圆形单元格的顶部边框着色？

Question

我必须制作一个集合视图，哪些单元格是从左到右舍入的，下面的代码没问题

    let maskPath = UIBezierPath(roundedRect: self.bounds,
                                byRoundingCorners: corners,
                                cornerRadii: CGSize(width: 10.0, height: 10.0))
    let maskLayer = CAShapeLayer()
    maskLayer.frame = self.bounds
    maskLayer.path  = maskPath.CGPath
    self.layer.mask = maskLayer
    self.layer.masksToBounds = true

但还有一件事，我想给每个单元格的顶部添加边框颜色，

有什么想法吗？

感谢。

Answer 1

有些差异，所以：

let view = UIView(frame: CGRect(x: 100, y: 100, width: 100, height: 100))

let shapeOfView = CAShapeLayer()
shapeOfView.position = view.center
shapeOfView.bounds = view.frame
shapeOfView.path = UIBezierPath(roundedRect: view.bounds, byRoundingCorners: [.topLeft, .topRight], cornerRadii: CGSize(width: 10.0, height: 10)).cgPath        

view.layer.backgroundColor = UIColor.red.cgColor
view.layer.mask = shapeOfView

Answer 2

你可以，

  var border = CALayer()
    border.frame = CGRectMake(0, 0, CGRectGetWidth(self.view.frame), 1) //set width and heigt (thickness of your border)
    border.backgroundColor = color.CGColor; //desired color
    yourCell.layer.addSublayer(border)

Answer 3

将CAlayer添加为单元格

的子图层

    CALayer *borderLayer = [CALayer layer];

    borderLayer.borderColor = [UIColor greenColor].CGColor;

    borderLayer.borderWidth = 3.0f;

    borderLayer.frame = CGRectMake(0, 0, cell.frame.size.width, 1);

    [cell.layer addSublayer:borderLayer];