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round corner only for top left-right
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| //Pay attention to the fact that if you have layout constraints attached to it, you must refresh this as follows in your UIView subclass: | |
| override func layoutSubviews() { | |
| super.layoutSubviews() | |
| roundCorners(corners: [.topLeft, .topRight], radius: 3.0) | |
| } | |
| extension UIView { | |
| func roundCorners(corners: UIRectCorner, radius: CGFloat) { | |
| let path = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) | |
| let mask = CAShapeLayer() | |
| mask.path = path.cgPath | |
| layer.mask = mask | |
| } | |
| } |
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