How to set layer cornerRadius for only bottom-left, bottom-right, and top-left corner? - swift

Question

How to set corner radius only only bottom-left, bottom-right, and top-left corners of a textview?
let rectShape = CAShapeLayer()
rectShape.backgroundColor = UIColor.redColor().CGColor
rectShape.bounds = messages.frame
rectShape.position = messages.center
rectShape.path = UIBezierPath(roundedRect: messages.bounds, byRoundingCorners: .BottomLeft | .TopRight, cornerRadii: CGSize(width: 20, height: 20)).CGPath
messages.layer.addSublayer(rectShape)
this code creates two rects. I dont know why.

Answer 1

(swift 4/iOS 11) Just simply say for bottom:
yourView.clipsToBounds = true
yourView.layer.cornerRadius = 10
yourView.layer.maskedCorners = [.layerMaxXMaxYCorner, .layerMinXMaxYCorner]
for Up:
yourView.clipsToBounds = true
yourView.layer.cornerRadius = 10
yourView.layer.maskedCorners = [.layerMaxXMinYCorner, .layerMinXMinYCorner]
in your case:
yourView.layer.maskedCorners = [.layerMaxXMaxYCorner, .layerMinXMaxYCorner, .layerMinXMinYCorner]
Hope this help :)

Answer 2

You just need to mask the layer as shown below:
For Swift 3:
let rectShape = CAShapeLayer()
rectShape.bounds = self.myView.frame
rectShape.position = self.myView.center
rectShape.path = UIBezierPath(roundedRect: self.myView.bounds, byRoundingCorners: [.bottomLeft , .bottomRight , .topLeft], cornerRadii: CGSize(width: 20, height: 20)).cgPath
self.myView.layer.backgroundColor = UIColor.green.cgColor
//Here I'm masking the textView's layer with rectShape layer
self.myView.layer.mask = rectShape
Lower Version:
let rectShape = CAShapeLayer()
rectShape.bounds = self.myView.frame
rectShape.position = self.myView.center
rectShape.path = UIBezierPath(roundedRect: self.myView.bounds, byRoundingCorners: .BottomLeft | .BottomRight | .TopLeft, cornerRadii: CGSize(width: 20, height: 20)).CGPath
self.myView.layer.backgroundColor = UIColor.greenColor().CGColor
//Here I'm masking the textView's layer with rectShape layer
self.myView.layer.mask = rectShape

Answer 3

Swift 3
extension UIView {
func roundCorners(_ corners:UIRectCorner, radius: CGFloat) {
let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
let mask = CAShapeLayer()
mask.path = path.cgPath
self.layer.mask = mask
}
}
Use like this
YourView.roundCorners([.topLeft, .bottomLeft], radius: 10)

Answer 4

A better answer for both iOS 11 and iOS 10 bottom corner would be
if #available(iOS 11.0, *){
view.clipsToBounds = true
view.layer.cornerRadius = 10
view.layer.maskedCorners = [.layerMaxXMaxYCorner, .layerMinXMaxYCorner]
}else{
let rectShape = CAShapeLayer()
rectShape.bounds = view.frame
rectShape.position = view.center
rectShape.path = UIBezierPath(roundedRect: view.bounds, byRoundingCorners: [.bottomLeft , .bottomRight], cornerRadii: CGSize(width: 20, height: 20)).cgPath
view.layer.backgroundColor = UIColor.green.cgColor
view.layer.mask = rectShape
}
in case this didnt work on iOS 10 and below, try running the code in viewDidLayoutSubviews() of your viewcontroller class like this
override func viewDidLayoutSubviews() {
if #available(iOS 11.0, *){
}else{
let rectShape = CAShapeLayer()
rectShape.bounds = view.frame
rectShape.position = view.center
rectShape.path = UIBezierPath(roundedRect: view.bounds, byRoundingCorners: [.bottomLeft , .bottomRight], cornerRadii: CGSize(width: 20, height: 20)).cgPath
view.layer.backgroundColor = UIColor.green.cgColor
view.layer.mask = rectShape
}

Answer 5

Swift 4+
func roundCorners(with CACornerMask: CACornerMask, radius: CGFloat) {
self.layer.cornerRadius = radius
self.layer.maskedCorners = [CACornerMask]
}
How to use
//Top right
roundCorners(with: [.layerMaxXMinYCorner], radius: 20)
//Top left
roundCorners(with: [.layerMinXMinYCorner], radius: 20)
//Bottom right
roundCorners(with: [.layerMaxXMaxYCorner], radius: 20)
//Bottom left
roundCorners(with: [.layerMinXMaxYCorner], radius: 20)
OR
Another way using CACornerMask
extension UIView{
enum RoundCornersAt{
case topRight
case topLeft
case bottomRight
case bottomLeft
}
//multiple corners using CACornerMask
func roundCorners(corners:[RoundCornersAt], radius: CGFloat) {
self.layer.cornerRadius = radius
self.layer.maskedCorners = [
corners.contains(.topRight) ? .layerMaxXMinYCorner:.init(),
corners.contains(.topLeft) ? .layerMinXMinYCorner:.init(),
corners.contains(.bottomRight) ? .layerMaxXMaxYCorner:.init(),
corners.contains(.bottomLeft) ? .layerMinXMaxYCorner:.init(),
]
}
}
You can use like below
myView.roundCorners(corners: [.topLeft,.bottomLeft], radius: 20)
OR
Multiple corners using UIRectCorner
func roundedCorners(corners : UIRectCorner, radius : CGFloat) {
let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
let mask = CAShapeLayer()
mask.path = path.cgPath
layer.mask = mask
}
How to use
roundedCorners(corners: [.topLeft, .topRight], radius: 20)

Answer 6

For subview & POPUPs [Swift 5]
override func layoutSublayers(of layer: CALayer) {
searchBarPopup.clipsToBounds = true
searchBarPopup.layer.cornerRadius = 10
searchBarPopup.layer.maskedCorners = [ .layerMaxXMinYCorner, .layerMinXMinYCorner]
}
output:

Answer 7

Swift 4
override func viewDidLoad() {
let topRight = UIView(frame: CGRect(x: 120, y: 200, width: 120, height: 120))
topRight.roundedTop()
topRight.backgroundColor = .red
self.view.center = topRight.center
self.view.addSubview(topRight)
super.viewDidLoad()
}
Output :
extension on UIView Swift 4 : Reference Link

Answer 8

Here is an extension for iOS 11+
import Foundation
import UIKit
extension UIView {
func roundCorners(_ corners: CACornerMask, radius: CGFloat, borderColor: UIColor, borderWidth: CGFloat) {
self.layer.maskedCorners = corners
self.layer.cornerRadius = radius
self.layer.borderWidth = borderWidth
self.layer.borderColor = borderColor.cgColor
}
}
Usage:-
self.yourView.roundCorners([.layerMaxXMaxYCorner, .layerMaxXMinYCorner], radius: 20.0, borderColor: UIColor.green, borderWidth: 1)
Swift 5+
view.layer.maskedCorners = [.layerMaxXMaxYCorner, .layerMaxXMinYCorner]

Answer 9

Add RoundedCornerView.swift file to your project
Add an UIView to your ViewController
Change Custom Class in Identity Inspector to RoundedCornerView
Go to Attribute Inspector pick Corner Radius (CGFloat) and On the corners you want rounded.
RoundedCornerView.swift
import UIKit
#IBDesignable
class RoundedCornerView: UIView {
var cornerRadiusValue : CGFloat = 0
var corners : UIRectCorner = []
#IBInspectable public var cornerRadius : CGFloat {
get {
return cornerRadiusValue
}
set {
cornerRadiusValue = newValue
}
}
#IBInspectable public var topLeft : Bool {
get {
return corners.contains(.topLeft)
}
set {
setCorner(newValue: newValue, for: .topLeft)
}
}
#IBInspectable public var topRight : Bool {
get {
return corners.contains(.topRight)
}
set {
setCorner(newValue: newValue, for: .topRight)
}
}
#IBInspectable public var bottomLeft : Bool {
get {
return corners.contains(.bottomLeft)
}
set {
setCorner(newValue: newValue, for: .bottomLeft)
}
}
#IBInspectable public var bottomRight : Bool {
get {
return corners.contains(.bottomRight)
}
set {
setCorner(newValue: newValue, for: .bottomRight)
}
}
func setCorner(newValue: Bool, for corner: UIRectCorner) {
if newValue {
addRectCorner(corner: corner)
} else {
removeRectCorner(corner: corner)
}
}
func addRectCorner(corner: UIRectCorner) {
corners.insert(corner)
updateCorners()
}
func removeRectCorner(corner: UIRectCorner) {
if corners.contains(corner) {
corners.remove(corner)
updateCorners()
}
}
func updateCorners() {
let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: cornerRadiusValue, height: cornerRadiusValue))
let mask = CAShapeLayer()
mask.path = path.cgPath
self.layer.mask = mask
}
}
github link : RoundedCornerView

Answer 10

The best solution I could come up with all of the above solution is this.
extension UIView {
func roundCorners(_ corners: UIRectCorner, radius: CGFloat) {
if #available(iOS 11, *) {
var cornerMask = CACornerMask()
if(corners.contains(.topLeft)){
cornerMask.insert(.layerMinXMinYCorner)
}
if(corners.contains(.topRight)){
cornerMask.insert(.layerMaxXMinYCorner)
}
if(corners.contains(.bottomLeft)){
cornerMask.insert(.layerMinXMaxYCorner)
}
if(corners.contains(.bottomRight)){
cornerMask.insert(.layerMaxXMaxYCorner)
}
self.layer.cornerRadius = radius
self.layer.maskedCorners = cornerMask
} else {
let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
let mask = CAShapeLayer()
mask.path = path.cgPath
self.layer.mask = mask
}
}
}
I believe that this way the implementation is easy while selecting the sides.
view.roundCorners([.bottomLeft, .bottomRight, .topLeft], radius: 16)

Answer 11

extension UIView {
func roundCorners(_ corners: CACornerMask, radius: CGFloat) {
if #available(iOS 11, *) {
self.layer.cornerRadius = radius
self.layer.maskedCorners = corners
} else {
var cornerMask = UIRectCorner()
if(corners.contains(.layerMinXMinYCorner)){
cornerMask.insert(.topLeft)
}
if(corners.contains(.layerMaxXMinYCorner)){
cornerMask.insert(.topRight)
}
if(corners.contains(.layerMinXMaxYCorner)){
cornerMask.insert(.bottomLeft)
}
if(corners.contains(.layerMaxXMaxYCorner)){
cornerMask.insert(.bottomRight)
}
let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: cornerMask, cornerRadii: CGSize(width: radius, height: radius))
let mask = CAShapeLayer()
mask.path = path.cgPath
self.layer.mask = mask
}
}
}

Answer 12

issue solved right top and right bottom work now
Tested code in iOS 9 , 10 , 11 version
extension UIView {
func roundCorners(_ corners:UIRectCorner,_ cormerMask:CACornerMask, radius: CGFloat) {
if #available(iOS 11.0, *){
self.clipsToBounds = false
self.layer.cornerRadius = radius
self.layer.maskedCorners = cormerMask
}else{
let rectShape = CAShapeLayer()
rectShape.bounds = self.frame
rectShape.position = self.center
rectShape.path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)).cgPath
self.layer.mask = rectShape
}
}
}

Answer 13

As #kazi.munshimun gave a view-only setup suggestion, it is wonderful, however I didn't want create a whole view for this, and I was looking for a one-only field for cornerRadius.
So I came up with the idea of flag combinations where for example BottomLeft(4) + BottomRight(8) = 12
Therefore, it needs on your view to set up the number combination from 0 (none) to 15 (all of corners) + clipsToBounds enabled. And that's it ! Entirely customizable through file.
This solution example works for iOS 11.0+ (Swift 4+) It can be adapted for lower versions :
extension UIView {
enum CornerEnum: Int {
case None = 0
case TopLeft = 1
case TopRight = 2
case BottomLeft = 4
case BottomRight = 8
}
#IBInspectable
var radiusCorners: Int {
set {
var corners = CACornerMask()
if(newValue & CornerEnum.TopLeft.rawValue != 0){
corners.insert(.layerMinXMinYCorner)
}
if(newValue & CornerEnum.TopRight.rawValue != 0){
corners.insert(.layerMaxXMinYCorner)
}
if(newValue & CornerEnum.BottomLeft.rawValue != 0){
corners.insert(.layerMinXMaxYCorner)
}
if(newValue & CornerEnum.BottomRight.rawValue != 0){
corners.insert(.layerMaxXMaxYCorner)
}
layer.maskedCorners = corners
}
get { return self.radiusCorners }
}
}