Is there a way to set cornerRadius
for only top-left and top-right corner of a UIView
?
I tried the following, but it end up not seeing the
In Swift 4.1 and Xcode 9.4.1
In iOS 11 this single line is enough:
detailsSubView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]//Set your view here
See the complete code:
//In viewDidLoad
if #available(iOS 11.0, *) {
detailsSubView.clipsToBounds = false
detailsSubView.layer.cornerRadius = 10
detailsSubView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
} else {
//For lower versions
}
But for lower versions
let rectShape = CAShapeLayer()
rectShape.bounds = detailsSubView.frame
rectShape.position = detailsSubView.center
rectShape.path = UIBezierPath(roundedRect: detailsSubView.bounds, byRoundingCorners: [.topLeft , .topRight], cornerRadii: CGSize(width: 20, height: 20)).cgPath
detailsSubView.layer.mask = rectShape
Complete code is.
if #available(iOS 11.0, *) {
detailsSubView.clipsToBounds = false
detailsSubView.layer.cornerRadius = 10
detailsSubView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
} else {
let rectShape = CAShapeLayer()
rectShape.bounds = detailsSubView.frame
rectShape.position = detailsSubView.center
rectShape.path = UIBezierPath(roundedRect: detailsSubView.bounds, byRoundingCorners: [.topLeft , .topRight], cornerRadii: CGSize(width: 20, height: 20)).cgPath
detailsSubView.layer.mask = rectShape
}
If you are using AutoResizing in storyboard write this code in viewDidLayoutSubviews().
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
if #available(iOS 11.0, *) {
detailsSubView.clipsToBounds = false
detailsSubView.layer.cornerRadius = 10
detailsSubView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
} else {
let rectShape = CAShapeLayer()
rectShape.bounds = detailsSubView.frame
rectShape.position = detailsSubView.center
rectShape.path = UIBezierPath(roundedRect: detailsSubView.bounds, byRoundingCorners: [.topLeft , .topRight], cornerRadii: CGSize(width: 20, height: 20)).cgPath
detailsSubView.layer.mask = rectShape
}
}
This would be the simplest answer:
yourView.layer.cornerRadius = 8
yourView.layer.masksToBounds = true
yourView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
All of the answers already given are really good and valid (especially Yunus idea of using the mask
property).
However I needed something a little more complex because my layer could often change sizes which mean I needed to call that masking logic every time and this was a little bit annoying.
I used swift extensions
and computed properties to build a real cornerRadii
property which takes care of auto updating the mask when layer is layed out.
This was achieved using Peter Steinberg great Aspects library for swizzling.
Full code is here:
extension CALayer {
// This will hold the keys for the runtime property associations
private struct AssociationKey {
static var CornerRect:Int8 = 1 // for the UIRectCorner argument
static var CornerRadius:Int8 = 2 // for the radius argument
}
// new computed property on CALayer
// You send the corners you want to round (ex. [.TopLeft, .BottomLeft])
// and the radius at which you want the corners to be round
var cornerRadii:(corners: UIRectCorner, radius:CGFloat) {
get {
let number = objc_getAssociatedObject(self, &AssociationKey.CornerRect) as? NSNumber ?? 0
let radius = objc_getAssociatedObject(self, &AssociationKey.CornerRadius) as? NSNumber ?? 0
return (corners: UIRectCorner(rawValue: number.unsignedLongValue), radius: CGFloat(radius.floatValue))
}
set (v) {
let radius = v.radius
let closure:((Void)->Void) = {
let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: v.corners, cornerRadii: CGSize(width: radius, height: radius))
let mask = CAShapeLayer()
mask.path = path.CGPath
self.mask = mask
}
let block: @convention(block) Void -> Void = closure
let objectBlock = unsafeBitCast(block, AnyObject.self)
objc_setAssociatedObject(self, &AssociationKey.CornerRect, NSNumber(unsignedLong: v.corners.rawValue), .OBJC_ASSOCIATION_RETAIN)
objc_setAssociatedObject(self, &AssociationKey.CornerRadius, NSNumber(float: Float(v.radius)), .OBJC_ASSOCIATION_RETAIN)
do { try aspect_hookSelector("layoutSublayers", withOptions: .PositionAfter, usingBlock: objectBlock) }
catch _ { }
}
}
}
I wrote a simple blog post explaining this.
iOS 11 , Swift 4
And you can try this code:
if #available(iOS 11.0, *) {
element.clipsToBounds = true
element.layer.cornerRadius = CORNER_RADIUS
element.layer.maskedCorners = [.layerMaxXMaxYCorner]
} else {
// Fallback on earlier versions
}
And you can using this in table view cell.
Another version of Stephane's answer.
import UIKit
class RoundCornerView: UIView {
var corners : UIRectCorner = [.topLeft,.topRight,.bottomLeft,.bottomRight]
var roundCornerRadius : CGFloat = 0.0
override func layoutSubviews() {
super.layoutSubviews()
if corners.rawValue > 0 && roundCornerRadius > 0.0 {
self.roundCorners(corners: corners, radius: roundCornerRadius)
}
}
private 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
}
}
My solution for rounding specific corners of UIView and UITextFiels in swift is to use
.layer.cornerRadius
and
layer.maskedCorners
of actual UIView or UITextFields.
Example:
fileprivate func inputTextFieldStyle() {
inputTextField.layer.masksToBounds = true
inputTextField.layer.borderWidth = 1
inputTextField.layer.cornerRadius = 25
inputTextField.layer.maskedCorners = [.layerMaxXMaxYCorner,.layerMaxXMinYCorner]
inputTextField.layer.borderColor = UIColor.white.cgColor
}
And by using
.layerMaxXMaxYCorner
and
.layerMaxXMinYCorner
, I can specify top right and bottom right corner of the UITextField to be rounded.
You can see the result here: