I am having issue with constraints. I am using UIBezierPath and auto layout. I have done almost everything given here and still the issue is not rectified and that is why I am posting this question. I am using the following function for rounding certain corner of my view (which I have made using storyboard)
func addShadowAndCorner(shadowColor: UIColor, offSet: CGSize, opacity: Float, shadowRadius: CGFloat, cornerRadius: CGFloat, corners: UIRectCorner, fillColor: UIColor = .white) {
let shadowLayer = CAShapeLayer()
let size = CGSize(width: cornerRadius, height: cornerRadius)
let cgPath = UIBezierPath(roundedRect: self.curvedView.bounds, byRoundingCorners: corners, cornerRadii: size).cgPath //1
shadowLayer.path = cgPath //2
shadowLayer.fillColor = fillColor.cgColor //3
shadowLayer.shadowColor = shadowColor.cgColor //4
shadowLayer.shadowPath = cgPath
shadowLayer.shadowOffset = offSet //5
shadowLayer.shadowOpacity = opacity
shadowLayer.shadowRadius = shadowRadius
self.curvedView.layer.addSublayer(shadowLayer)
}
Then I am calling this function as below
func configureView() {
self.view.backgroundColor = UIColor(named: "appBackgroundColor")
curvedView.backgroundColor = .clear
self.addShadowAndCorner(shadowColor: .darkGray, offSet: CGSize.init(width: 3.0, height: 3.0), opacity: 0.6, shadowRadius: 8, cornerRadius: 80, corners: [.topRight, .bottomLeft], fillColor: .white)
}
I have called the above function inside "override func viewDidLayoutSubviews()". But I am not getting expected behaviours for constraints on different phone sizes
The code works well when running on iPhone 11 simulator, the screenshot is shared below.
But when running the same code on iPhone SE simulator it is not working as expected. The screenshot is shared below for iPhone SE
The constraints for curvedView in storyboard is.
Please help me here. Thanks in advance
You'll have the most reliable (and flexible) results by creating a custom UIView subclass.
Here's a quick example:
class MyCustomView: UIView {
// properties with default values
var shadowColor: UIColor = .darkGray
var offset: CGSize = .zero
var opacity: Float = 1.0
var shadowRadius: CGFloat = 0.0
var cornerRadius: CGFloat = 0.0
var corners: UIRectCorner = []
var fillColor: UIColor = .white
let shadowLayer = CAShapeLayer()
convenience init(shadowColor: UIColor, offSet: CGSize, opacity: Float, shadowRadius: CGFloat, cornerRadius: CGFloat, corners: UIRectCorner, fillColor: UIColor = .white) {
self.init(frame: .zero)
self.shadowColor = shadowColor
self.offset = offSet
self.opacity = opacity
self.shadowRadius = shadowRadius
self.cornerRadius = cornerRadius
self.corners = corners
self.fillColor = fillColor
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
func commonInit() {
layer.addSublayer(shadowLayer)
}
override func layoutSubviews() {
super.layoutSubviews()
let size = CGSize(width: cornerRadius, height: cornerRadius)
let cgPath = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: size).cgPath //1
shadowLayer.path = cgPath //2
shadowLayer.fillColor = fillColor.cgColor //3
shadowLayer.shadowColor = shadowColor.cgColor //4
shadowLayer.shadowPath = cgPath
shadowLayer.shadowOffset = offset //5
shadowLayer.shadowOpacity = opacity
shadowLayer.shadowRadius = shadowRadius
}
func configureView(shadowColor: UIColor, offSet: CGSize, opacity: Float, shadowRadius: CGFloat, cornerRadius: CGFloat, corners: UIRectCorner, fillColor: UIColor = .white) {
self.shadowColor = shadowColor
self.offset = offSet
self.opacity = opacity
self.shadowRadius = shadowRadius
self.cornerRadius = cornerRadius
self.corners = corners
self.fillColor = fillColor
setNeedsLayout()
}
}
You can then add a UIView in Storyboard, assign its Custom Class to MyCustomView, connect it to an #IBOutlet, and then in viewDidLoad():
class MyTestVC: UIViewController {
#IBOutlet var curvedView: MyCustomView!
override func viewDidLoad() {
super.viewDidLoad()
curvedView.backgroundColor = .clear
curvedView.configureView(shadowColor: .darkGray, offSet: CGSize.init(width: 3.0, height: 3.0), opacity: 0.6, shadowRadius: 8, cornerRadius: 80, corners: [.topRight, .bottomLeft], fillColor: .white)
}
}
Now, it will auto-update itself when its frame changes... such as on different devices or on device rotation:
You can create it via code like this:
let curvedView = MyCustomView(shadowColor: .darkGray, offSet: CGSize.init(width: 3.0, height: 3.0), opacity: 0.6, shadowRadius: 8, cornerRadius: 80, corners: [.topRight, .bottomLeft], fillColor: .white)
and, with very little effort, you can make it #IBDesignable and configure your properties as #IBInspectable ... then you can visually see the result when you lay it out in Storyboard.
The only tricky property is the Corners, because there is no direct #IBInspectable option for UIRectCorner ... so we can use Bool properties for each corner:
#IBDesignable
class MyCustomView: UIView {
// properties with default values
#IBInspectable var shadowColor: UIColor = .darkGray
#IBInspectable var offset: CGSize = .zero
#IBInspectable var opacity: Float = 1.0
#IBInspectable var shadowRadius: CGFloat = 0.0
#IBInspectable var cornerRadius: CGFloat = 0.0
#IBInspectable var topLeft: Bool = false
#IBInspectable var topRight: Bool = false
#IBInspectable var bottomLeft: Bool = false
#IBInspectable var bottomRight: Bool = false
#IBInspectable var fillColor: UIColor = .white
private let shadowLayer = CAShapeLayer()
convenience init(shadowColor: UIColor, offSet: CGSize, opacity: Float, shadowRadius: CGFloat, cornerRadius: CGFloat, corners: UIRectCorner, fillColor: UIColor = .white) {
self.init(frame: .zero)
self.shadowColor = shadowColor
self.offset = offSet
self.opacity = opacity
self.shadowRadius = shadowRadius
self.cornerRadius = cornerRadius
self.fillColor = fillColor
self.topLeft = corners.contains(.topLeft)
self.topRight = corners.contains(.topRight)
self.bottomLeft = corners.contains(.bottomLeft)
self.bottomRight = corners.contains(.bottomRight)
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
private func commonInit() {
layer.addSublayer(shadowLayer)
}
override func layoutSubviews() {
super.layoutSubviews()
backgroundColor = .clear
var corners: UIRectCorner = UIRectCorner()
if self.topLeft { corners.insert(.topLeft) }
if self.topRight { corners.insert(.topRight) }
if self.bottomLeft { corners.insert(.bottomLeft) }
if self.bottomRight { corners.insert(.bottomRight) }
let size = CGSize(width: cornerRadius, height: cornerRadius)
let cgPath = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: size).cgPath //1
shadowLayer.path = cgPath
shadowLayer.fillColor = self.fillColor.cgColor
shadowLayer.shadowColor = self.shadowColor.cgColor
shadowLayer.shadowPath = cgPath
shadowLayer.shadowOffset = self.offset
shadowLayer.shadowOpacity = self.opacity
shadowLayer.shadowRadius = self.shadowRadius
}
public func configureView(shadowColor: UIColor, offSet: CGSize, opacity: Float, shadowRadius: CGFloat, cornerRadius: CGFloat, corners: UIRectCorner, fillColor: UIColor = .white) {
self.shadowColor = shadowColor
self.offset = offSet
self.opacity = opacity
self.shadowRadius = shadowRadius
self.cornerRadius = cornerRadius
self.fillColor = fillColor
self.topLeft = corners.contains(.topLeft)
self.topRight = corners.contains(.topRight)
self.bottomLeft = corners.contains(.bottomLeft)
self.bottomRight = corners.contains(.bottomRight)
setNeedsLayout()
}
}
Now, we get this in Storyboard:
You should apply the shadow code in didLayoutSubviews. At that point your views know their frame sizes. Make sure you call super too.
Be careful not to re-add the shadow sublayer every time by just calling your addShadowAndCorner function from didLayoutSubviews.
I want to create a subclass of UITextField with custom rounded corners and a shadow around, here is what I tried:
class TextField: UITextField {
override init(frame: CGRect) {
super.init(frame: frame)
setupUI()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
setupUI()
}
private func setupUI() {
font = .systemFont(ofSize: 14)
textColor = .black
layer.cornerRadius = 14.0
layer.borderWidth = 0.0
layer.shadowColor = UIColor.black.withAlphaComponent(0.2).cgColor
layer.shadowOpacity = 1.0
layer.shadowRadius = 24.0
layer.shadowOffset = CGSize(width: 0, height: 8)
placeholder = "test"
}
}
However, there isn't any shadow that appears around my text field:
I tried playing with clipsToBounds and layer.masksToBounds properties, but with no success. What should I do?
Thank you for your help
You need to give it a background color.
And, if you really want a corner radius of 14, you'll probably want to change the default insets:
class TextField: UITextField {
override init(frame: CGRect) {
super.init(frame: frame)
setupUI()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
setupUI()
}
private func setupUI() {
// add background color
backgroundColor = .white
font = .systemFont(ofSize: 14)
textColor = .black
layer.cornerRadius = 14.0
layer.borderWidth = 0.0
layer.shadowColor = UIColor.black.withAlphaComponent(0.2).cgColor
layer.shadowOpacity = 1.0
layer.shadowRadius = 24.0
layer.shadowOffset = CGSize(width: 0, height: 8)
placeholder = "test"
}
// adjust as desired
var textPadding = UIEdgeInsets(
top: 10,
left: 20,
bottom: 10,
right: 20
)
override func textRect(forBounds bounds: CGRect) -> CGRect {
let rect = super.textRect(forBounds: bounds)
return rect.inset(by: textPadding)
}
override func editingRect(forBounds bounds: CGRect) -> CGRect {
let rect = super.editingRect(forBounds: bounds)
return rect.inset(by: textPadding)
}
}
Result:
I made one extension for make rounded corners with shadow to any View like UIView,UIButton,UITextField etc.
extension UIView
{
func addCornerEffects(cornerRadius : CGFloat = 0, fillColor : UIColor = .white, shadowColor : UIColor = .clear, shadowOffset : CGSize, shadowOpacity : Float, shadowRadius : CGFloat, borderColor : UIColor, borderWidth : CGFloat)
{
self.layer.cornerRadius = cornerRadius
self.layer.shadowColor = shadowColor.cgColor
self.layer.shadowOffset = shadowOffset
self.layer.shadowRadius = shadowRadius
self.layer.shadowOpacity = shadowOpacity
self.layer.borderColor = borderColor.cgColor
self.layer.borderWidth = borderWidth
self.layer.backgroundColor = nil
self.layer.backgroundColor = fillColor.cgColor
}
}
You can use this in viewDidLoad in your ViewController like as below
DispatchQueue.main.asyncAfter(deadline: .now() + 0.1)
{
self.txtFirstName.addCornerEffects(cornerRadius: 14, fillColor: .white, shadowColor: UIColor.black.withAlphaComponent(0.2), shadowOffset: CGSize(width: 0, height: 8), shadowOpacity: 1.0, shadowRadius: 25.0, borderColor: .clear, borderWidth: 0)
}
Here is output
I wanted to design a rounded button with a shadow for my iOS project in Swift. So I came up with the following custom button class:
import UIKit
#IBDesignable class MainButton: UIButton {
private var shadowLayer: CAShapeLayer!
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func layoutSubviews() {
super.layoutSubviews()
let image = createBackgroundImage()
setBackgroundImage(image, for: UIControl.State.normal)
clipsToBounds = true
contentEdgeInsets = UIEdgeInsets(top: 5, left: 20, bottom: 5, right: 20)
layer.masksToBounds = false
layer.shadowColor = UIColor.black.cgColor
layer.shadowOffset = CGSize(width: 0, height: 3)
layer.shadowOpacity = 0.2
layer.shadowRadius = 6
}
func createBackgroundImage() -> UIImage {
let rect = CGRect(x: 0, y: 0, width: frame.width, height: frame.height)
UIGraphicsBeginImageContextWithOptions(frame.size, false, 0)
let color = UIColor.white
color.setFill()
UIBezierPath(roundedRect: rect, cornerRadius: frame.height * 0.5).addClip()
color.setFill()
UIRectFill(rect)
let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return image
}
}
As soon as I set this class for a button in my Storyboard the "IBDEsignablesAgent-iOS" process takes nearly 100% of my CPU and Xcode hangs it self. This behavior makes it near impossible to debug the problem correctly.
I'm quite certain I do something in the wrong order or wrong method. But I have no clue how to solve it. Hopefully someone here can point me the right direction.
Thanks,
Jens
Simply check that the size of the view actually changed:
private var lastSize: CGSize = .zero
override func layoutSubviews() {
super.layoutSubviews()
guard frame.size != lastSize else { return }
lastSize = frame.size
...
}
Creating shadows is slow and layoutSubviews is called tens of times every second (basically, once every frame).
My custom button with some shadow and rounded corners, I use it directly within the Storyboard, no need to touch it programmatically.
class RoundedCornerButtonWithShadow: UIButton {
override func awakeFromNib() {
super.awakeFromNib()
self.layer.masksToBounds = false
self.layer.cornerRadius = self.frame.height/2
self.layer.shadowColor = UIColor.black.cgColor
self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.layer.cornerRadius).cgPath
self.layer.shadowOffset = CGSize(width: 0.0, height: 3.0)
self.layer.shadowOpacity = 0.5
self.layer.shadowRadius = 1.0
}
}
I made a custom class that creates a sort of timeline that is meant to be scrolled horizontally. Here's the code for my custom UIScrollView :
import UIKit
struct DataPoint {
var fillColor: UIColor = UIColor.grayColor()
init(color: UIColor) {
fillColor = color
}
}
#IBDesignable
class MyView: UIScrollView {
#IBInspectable var lineColor: UIColor = UIColor.grayColor()
#IBInspectable var lineHeight: CGFloat = 65
#IBInspectable var lineWidth: CGFloat = 15
#IBInspectable var lineGap: CGFloat = 25
#IBInspectable var lineCount: Int = 0
var dataPoints = [DataPoint(color: UIColor.greenColor()), DataPoint(color: UIColor.blueColor())]
override init(frame: CGRect) {
super.init(frame: frame)
setupValues()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setupValues()
//fatalError("init(coder:) has not been implemented")
}
func setupValues() {
self.contentSize = CGSize(width: self.frame.width * 2, height: self.frame.height)
self.backgroundColor = UIColor.whiteColor()
self.lineCount = Int(self.frame.width / lineGap)
}
override internal func layoutSubviews() {
super.layoutSubviews()
self.setNeedsDisplay()
self.layoutIfNeeded()
}
override func drawRect(rect: CGRect) {
let ctx = UIGraphicsGetCurrentContext()
CGContextSaveGState(ctx)
for i in 0...lineCount {
let start = CGPoint(x: CGFloat(i) * lineGap, y: self.frame.height)
let end = CGPoint(x: CGFloat(i) * lineGap, y: self.frame.height - lineHeight)
drawLine(from: start, to: end, color: UIColor.grayColor())
if i % (lineCount / (dataPoints.count + 2)) == 0 && i != 0 && i != lineCount {
drawPoint(at: end, radius: 5, color: UIColor.orangeColor())
}
}
CGContextRestoreGState(ctx)
}
func drawLine(from start: CGPoint, to end: CGPoint, color: UIColor) {
let path = UIBezierPath()
path.moveToPoint(start)
path.addLineToPoint(end)
let shapeLayer = CAShapeLayer()
shapeLayer.path = path.CGPath
shapeLayer.strokeColor = color.CGColor
shapeLayer.lineWidth = 1
self.layer.addSublayer(shapeLayer)
}
func drawPoint(at center: CGPoint, radius: CGFloat, color: UIColor) {
let path = UIBezierPath(arcCenter: center, radius: radius, startAngle: CGFloat(0), endAngle: CGFloat(M_PI * 2), clockwise: true)
let shapeLayer = CAShapeLayer()
shapeLayer.path = path.CGPath
shapeLayer.fillColor = color.CGColor
shapeLayer.strokeColor = UIColor.blackColor().CGColor
shapeLayer.lineWidth = 0.5
self.layer.addSublayer(shapeLayer)
}
}
On my device and on the simulators, this is extremely slow and laggy. What exactly am I doing wrong here ? And what steps can I take to achieve a solid 60fps while scrolling ?
Hello I found your problem, your problem is
override internal func layoutSubviews() {
super.layoutSubviews()
self.setNeedsDisplay()
self.layoutIfNeeded()
}
you are accidentally in a never-ending paint loop
replace this by this
override internal func layoutSubviews() {
super.layoutSubviews()
}
or remove at all
I hope this Helps you, for me works great
It looks to me that you are drawing the same thing every time. Everything is static... So why not draw it all once into a graphics context and make a UIImage out of it to add to the background of the scrollview (or foreground, depending on anything else you are doing)?
I'm trying to create a button with rounded corners and a drop shadow. No matter how I switch up, the button will not display correctly. I've tried masksToBounds = false and masksToBounds = true, but either the corner radius works and the shadow does not or the shadow works and the corner radius doesn't clip the corners of the button.
import UIKit
import QuartzCore
#IBDesignable
class Button : UIButton
{
#IBInspectable var masksToBounds: Bool = false {didSet{updateLayerProperties()}}
#IBInspectable var cornerRadius : CGFloat = 0 {didSet{updateLayerProperties()}}
#IBInspectable var borderWidth : CGFloat = 0 {didSet{updateLayerProperties()}}
#IBInspectable var borderColor : UIColor = UIColor.clearColor() {didSet{updateLayerProperties()}}
#IBInspectable var shadowColor : UIColor = UIColor.clearColor() {didSet{updateLayerProperties()}}
#IBInspectable var shadowOpacity: CGFloat = 0 {didSet{updateLayerProperties()}}
#IBInspectable var shadowRadius : CGFloat = 0 {didSet{updateLayerProperties()}}
#IBInspectable var shadowOffset : CGSize = CGSizeMake(0, 0) {didSet{updateLayerProperties()}}
override func drawRect(rect: CGRect)
{
updateLayerProperties()
}
func updateLayerProperties()
{
self.layer.masksToBounds = masksToBounds
self.layer.cornerRadius = cornerRadius
self.layer.borderWidth = borderWidth
self.layer.borderColor = borderColor.CGColor
self.layer.shadowColor = shadowColor.CGColor
self.layer.shadowOpacity = CFloat(shadowOpacity)
self.layer.shadowRadius = shadowRadius
self.layer.shadowOffset = shadowOffset
}
}
The following Swift 5 / iOS 12 code shows how to set a subclass of UIButton that allows to create instances with rounded corners and shadow around it:
import UIKit
final class CustomButton: UIButton {
private var shadowLayer: CAShapeLayer!
override func layoutSubviews() {
super.layoutSubviews()
if shadowLayer == nil {
shadowLayer = CAShapeLayer()
shadowLayer.path = UIBezierPath(roundedRect: bounds, cornerRadius: 12).cgPath
shadowLayer.fillColor = UIColor.white.cgColor
shadowLayer.shadowColor = UIColor.darkGray.cgColor
shadowLayer.shadowPath = shadowLayer.path
shadowLayer.shadowOffset = CGSize(width: 2.0, height: 2.0)
shadowLayer.shadowOpacity = 0.8
shadowLayer.shadowRadius = 2
layer.insertSublayer(shadowLayer, at: 0)
//layer.insertSublayer(shadowLayer, below: nil) // also works
}
}
}
According to your needs, you may add a UIButton in your Storyboard and set its class to CustomButton or you may create an instance of CustomButton programmatically. The following UIViewController implementation shows how to create and use a CustomButton instance programmatically:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let button = CustomButton(type: .system)
button.setTitle("Button", for: .normal)
view.addSubview(button)
button.translatesAutoresizingMaskIntoConstraints = false
let horizontalConstraint = button.centerXAnchor.constraint(equalTo: view.centerXAnchor)
let verticalConstraint = button.centerYAnchor.constraint(equalTo: view.centerYAnchor)
let widthConstraint = button.widthAnchor.constraint(equalToConstant: 100)
let heightConstraint = button.heightAnchor.constraint(equalToConstant: 100)
NSLayoutConstraint.activate([horizontalConstraint, verticalConstraint, widthConstraint, heightConstraint])
}
}
The previous code produces the image below in the iPhone simulator:
My custom button with some shadow and rounded corners, I use it directly within the Storyboard with no need to touch it programmatically.
Swift 4
class RoundedButtonWithShadow: UIButton {
override func awakeFromNib() {
super.awakeFromNib()
self.layer.masksToBounds = false
self.layer.cornerRadius = self.frame.height/2
self.layer.shadowColor = UIColor.black.cgColor
self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.layer.cornerRadius).cgPath
self.layer.shadowOffset = CGSize(width: 0.0, height: 3.0)
self.layer.shadowOpacity = 0.5
self.layer.shadowRadius = 1.0
}
}
To expand on Imanou's post, it's possible to programmatically add the shadow layer in the custom button class
#IBDesignable class CustomButton: UIButton {
var shadowAdded: Bool = false
#IBInspectable var cornerRadius: CGFloat = 0 {
didSet {
layer.cornerRadius = cornerRadius
layer.masksToBounds = cornerRadius > 0
}
}
override func drawRect(rect: CGRect) {
super.drawRect(rect)
if shadowAdded { return }
shadowAdded = true
let shadowLayer = UIView(frame: self.frame)
shadowLayer.backgroundColor = UIColor.clearColor()
shadowLayer.layer.shadowColor = UIColor.darkGrayColor().CGColor
shadowLayer.layer.shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: self.cornerRadius).CGPath
shadowLayer.layer.shadowOffset = CGSize(width: 1.0, height: 1.0)
shadowLayer.layer.shadowOpacity = 0.5
shadowLayer.layer.shadowRadius = 1
shadowLayer.layer.masksToBounds = true
shadowLayer.clipsToBounds = false
self.superview?.addSubview(shadowLayer)
self.superview?.bringSubviewToFront(self)
}
}
An alternative way to get more usable and consistent button.
Swift 2:
func getImageWithColor(color: UIColor, size: CGSize, cornerRadius:CGFloat) -> UIImage {
let rect = CGRectMake(0, 0, size.width, size.height)
UIGraphicsBeginImageContextWithOptions(size, false, 1)
UIBezierPath(
roundedRect: rect,
cornerRadius: cornerRadius
).addClip()
color.setFill()
UIRectFill(rect)
let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
let button = UIButton(type: .Custom)
button.frame = CGRectMake(20, 20, 200, 50)
button.setTitle("My Button", forState: UIControlState.Normal)
button.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
self.addSubview(button)
let image = getImageWithColor(UIColor.whiteColor(), size: button.frame.size, cornerRadius: 5)
button.setBackgroundImage(image, forState: UIControlState.Normal)
button.layer.shadowRadius = 5
button.layer.shadowColor = UIColor.blackColor().CGColor
button.layer.shadowOpacity = 0.5
button.layer.shadowOffset = CGSizeMake(0, 1)
button.layer.masksToBounds = false
Swift 3:
func getImageWithColor(_ color: UIColor, size: CGSize, cornerRadius:CGFloat) -> UIImage? {
let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
UIGraphicsBeginImageContextWithOptions(size, false, 0)
color.setFill()
UIBezierPath(roundedRect: rect, cornerRadius: cornerRadius).addClip()
color.setFill()
UIRectFill(rect)
let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return image
}
let button = UIButton(type: .custom)
button.frame = CGRect(x:20, y:20, width:200, height:50)
button.setTitle("My Button", for: .normal)
button.setTitleColor(UIColor.black, for: .normal)
self.addSubview(button)
if let image = getImageWithColor(UIColor.white, size: button.frame.size, cornerRadius: 5) {
button.setBackgroundImage(image, for: .normal)
}
button.layer.shadowRadius = 5
button.layer.shadowColor = UIColor.black.cgColor
button.layer.shadowOpacity = 0.5
button.layer.shadowOffset = CGSize(width:0, height:1)
button.layer.masksToBounds = false
Swift 5 &
No need of "UIBezierPath"
view.layer.cornerRadius = 15
view.clipsToBounds = true
view.layer.masksToBounds = false
view.layer.shadowRadius = 7
view.layer.shadowOpacity = 0.6
view.layer.shadowOffset = CGSize(width: 0, height: 5)
view.layer.shadowColor = UIColor.red.cgColor
Refactored this to support any view. Subclass your view from this and it should have rounded corners. If you add something like a UIVisualEffectView as a subview to this view you likely need to use the same rounded corners on that UIVisualEffectView or it won't have rounded corners.
/// Inspiration: https://stackoverflow.com/a/25475536/129202
class ViewWithRoundedcornersAndShadow: UIView {
private var theShadowLayer: CAShapeLayer?
override func layoutSubviews() {
super.layoutSubviews()
if self.theShadowLayer == nil {
let rounding = CGFloat.init(22.0)
let shadowLayer = CAShapeLayer.init()
self.theShadowLayer = shadowLayer
shadowLayer.path = UIBezierPath.init(roundedRect: bounds, cornerRadius: rounding).cgPath
shadowLayer.fillColor = UIColor.clear.cgColor
shadowLayer.shadowPath = shadowLayer.path
shadowLayer.shadowColor = UIColor.black.cgColor
shadowLayer.shadowRadius = CGFloat.init(3.0)
shadowLayer.shadowOpacity = Float.init(0.2)
shadowLayer.shadowOffset = CGSize.init(width: 0.0, height: 4.0)
self.layer.insertSublayer(shadowLayer, at: 0)
}
}
}
Exact solution for 2020 syntax
import UIKit
class ColorAndShadowButton: UIButton {
override init(frame: CGRect) { super.init(frame: frame), common() }
required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder), common() }
private func common() {
// UIButton is tricky: you MUST set the clear bg in bringup; NOT in layout
backgroundColor = .clear
clipsToBounds = false
layer.insertSublayer(colorAndShadow, below: layer)
}
lazy var colorAndShadow: CAShapeLayer = {
let s = CAShapeLayer()
// set your button color HERE (NOT on storyboard)
s.fillColor = UIColor.black.cgColor
// now set your shadow color/values
s.shadowColor = UIColor.red.cgColor
s.shadowOffset = CGSize(width: 0, height: 10)
s.shadowOpacity = 1
s.shadowRadius = 10
// now add the shadow
layer.insertSublayer(s, at: 0)
return s
}()
override func layoutSubviews() {
super.layoutSubviews()
// you MUST layout these two EVERY layout cycle:
colorAndShadow.frame = bounds
colorAndShadow.path = UIBezierPath(roundedRect: bounds, cornerRadius: 12).cgPath
}
}
Note that the very old top answer here is correct but has a critical error
Note that UIButton is unfortunately quite different from UIView in iOS.
Due to a strange behavior in iOS, you must set the background color (which of course must be clear in this case) in initialization, not in layout. You could just set it clear in storyboard (but you usually click it to be some solid color simply so you can see it when working in storyboard.)
In general combos of shadows/rounding are a real pain in iOS. Similar solutions:
https://stackoverflow.com/a/57465440/294884 - image + rounded + shadows
https://stackoverflow.com/a/41553784/294884 - two-corner problem
https://stackoverflow.com/a/59092828/294884 - "shadows + hole" or "glowbox" problem
https://stackoverflow.com/a/57400842/294884 - the "border AND gap" problem
https://stackoverflow.com/a/57514286/294884 - basic "adding" beziers
To improve PiterPan's answer and show a real shadow (not just a background with no blur) with a circular button in Swift 3:
override func viewDidLoad() {
super.viewDidLoad()
myButton.layer.masksToBounds = false
myButton.layer.cornerRadius = myButton.frame.height/2
myButton.clipsToBounds = true
}
override func viewDidLayoutSubviews() {
addShadowForRoundedButton(view: self.view, button: myButton, opacity: 0.5)
}
func addShadowForRoundedButton(view: UIView, button: UIButton, opacity: Float = 1) {
let shadowView = UIView()
shadowView.backgroundColor = UIColor.black
shadowView.layer.opacity = opacity
shadowView.layer.shadowRadius = 5
shadowView.layer.shadowOpacity = 0.35
shadowView.layer.shadowOffset = CGSize(width: 0, height: 0)
shadowView.layer.cornerRadius = button.bounds.size.width / 2
shadowView.frame = CGRect(origin: CGPoint(x: button.frame.origin.x, y: button.frame.origin.y), size: CGSize(width: button.bounds.width, height: button.bounds.height))
self.view.addSubview(shadowView)
view.bringSubview(toFront: button)
}
Corner Radius with Shadow
Short and simple way !!!!!
extension CALayer {
func applyCornerRadiusShadow(
color: UIColor = .black,
alpha: Float = 0.5,
x: CGFloat = 0,
y: CGFloat = 2,
blur: CGFloat = 4,
spread: CGFloat = 0,
cornerRadiusValue: CGFloat = 0)
{
cornerRadius = cornerRadiusValue
shadowColor = color.cgColor
shadowOpacity = alpha
shadowOffset = CGSize(width: x, height: y)
shadowRadius = blur / 2.0
if spread == 0 {
shadowPath = nil
} else {
let dx = -spread
let rect = bounds.insetBy(dx: dx, dy: dx)
shadowPath = UIBezierPath(rect: rect).cgPath
}
}
Use of code
btn.layer.applyCornerRadiusShadow(color: .black,
alpha: 0.38,
x: 0, y: 3,
blur: 10,
spread: 0,
cornerRadiusValue: 24)
No need maskToBound
Please verify clipsToBounds is false.
OUTPUT
Extension to drop shadow and corner radius
extension UIView {
func dropShadow(color: UIColor, opacity: Float = 0.5, offSet: CGSize, shadowRadius: CGFloat = 1, scale: Bool = true, cornerRadius: CGFloat) {
let shadowLayer = CAShapeLayer()
shadowLayer.path = UIBezierPath(roundedRect: bounds, cornerRadius: cornerRadius).cgPath
shadowLayer.fillColor = UIColor.white.cgColor
shadowLayer.shadowColor = color.cgColor
shadowLayer.shadowPath = shadowLayer.path
shadowLayer.shadowOffset = offSet
shadowLayer.shadowOpacity = opacity
shadowLayer.shadowRadius = shadowRadius
layer.insertSublayer(shadowLayer, at: 0)
}
}
Here is the solution that will work!
extension UIView {
func applyShadowWithCornerRadius(color:UIColor, opacity:Float, radius: CGFloat, edge:AIEdge, shadowSpace:CGFloat) {
var sizeOffset:CGSize = CGSize.zero
switch edge {
case .Top:
sizeOffset = CGSize(width: 0, height: -shadowSpace)
case .Left:
sizeOffset = CGSize(width: -shadowSpace, height: 0)
case .Bottom:
sizeOffset = CGSize(width: 0, height: shadowSpace)
case .Right:
sizeOffset = CGSize(width: shadowSpace, height: 0)
case .Top_Left:
sizeOffset = CGSize(width: -shadowSpace, height: -shadowSpace)
case .Top_Right:
sizeOffset = CGSize(width: shadowSpace, height: -shadowSpace)
case .Bottom_Left:
sizeOffset = CGSize(width: -shadowSpace, height: shadowSpace)
case .Bottom_Right:
sizeOffset = CGSize(width: shadowSpace, height: shadowSpace)
case .All:
sizeOffset = CGSize(width: 0, height: 0)
case .None:
sizeOffset = CGSize.zero
}
self.layer.cornerRadius = self.frame.size.height / 2
self.layer.masksToBounds = true;
self.layer.shadowColor = color.cgColor
self.layer.shadowOpacity = opacity
self.layer.shadowOffset = sizeOffset
self.layer.shadowRadius = radius
self.layer.masksToBounds = false
self.layer.shadowPath = UIBezierPath(roundedRect:self.bounds, cornerRadius:self.layer.cornerRadius).cgPath
}
}
enum AIEdge:Int {
case
Top,
Left,
Bottom,
Right,
Top_Left,
Top_Right,
Bottom_Left,
Bottom_Right,
All,
None
}
Finally, to apply shadow with corner radius call as per below:
viewRounded.applyShadowWithCornerRadius(color: .gray, opacity: 1, radius: 15, edge: AIEdge.All, shadowSpace: 15)
Result Image
UPDATE: If you don't see the expected output then try calling the extension method from Main Thread, that will work for sure!
DispatchQueue.main.async {
viewRounded.applyShadowWithCornerRadius(color: .gray, opacity: 1, radius: 15, edge: AIEdge.All, shadowSpace: 15)
}
UIButton Extension
Many people have proposed using a custom class of UIButton which is totally fine. Just in case you want an extension, like me, here's one. Written in Swift 5.
extension UIButton {
/// Adds a shadow to the button, with a corner radius
/// - Parameters:
/// - corner: The corner radius to apply to the shadow and button
/// - color: The color of the shaodw
/// - opacity: The opacity of the shadow
/// - offset: The offset of the shadow
/// - radius: The radius of the shadow
func addShadow(corner: CGFloat = 20, color: UIColor = .black, opacity: Float = 0.3, offset: CGSize = CGSize(width: 0, height: 5), radius: CGFloat = 5) {
let shadowLayer = CAShapeLayer()
layer.cornerRadius = corner
shadowLayer.path = UIBezierPath(roundedRect: bounds, cornerRadius: corner).cgPath
shadowLayer.fillColor = UIColor.clear.cgColor
shadowLayer.shadowColor = color.cgColor
shadowLayer.shadowPath = shadowLayer.path
shadowLayer.shadowOffset = offset
shadowLayer.shadowOpacity = opacity
shadowLayer.shadowRadius = radius
layer.insertSublayer(shadowLayer, at: 0)
}
}
If somebody need add shadows to rounded buttons in Swift 3.0, here is a good method to do it.
func addShadowForRoundedButton(view: UIView, button: UIButton, shadowColor: UIColor, shadowOffset: CGSize, opacity: Float = 1) {
let shadowView = UIView()
shadowView.backgroundColor = shadowColor
shadowView.layer.opacity = opacity
shadowView.layer.cornerRadius = button.bounds.size.width / 2
shadowView.frame = CGRect(origin: CGPoint(x: button.frame.origin.x + shadowOffset.width, y: button.frame.origin.y + shadowOffset.height), size: CGSize(width: button.bouds.width, height: button.bounds.height))
self.view.addSubview(shadowView)
view.bringSubview(toFront: button)
}
Use this method in func viewDidLayoutSubviews() as bellow:
override func viewDidLayoutSubviews() {
addShadowForRoundedButton(view: self.view, button: button, shadowColor: .black, shadowOffset: CGSize(width: 2, height: 2), opacity: 0.5)
}
The effect of this method is:
You can create a protocol and conform it to you UIView, UIButton, Cell or whatever you want like that:
protocol RoundedShadowable: class {
var shadowLayer: CAShapeLayer? { get set }
var layer: CALayer { get }
var bounds: CGRect { get }
}
extension RoundedShadowable {
func applyShadowOnce(withCornerRadius cornerRadius: CGFloat, andFillColor fillColor: UIColor) {
if self.shadowLayer == nil {
let shadowLayer = CAShapeLayer()
shadowLayer.path = UIBezierPath(roundedRect: bounds, cornerRadius: cornerRadius).cgPath
shadowLayer.fillColor = fillColor.cgColor
shadowLayer.shadowColor = UIColor.black.cgColor
shadowLayer.shadowPath = shadowLayer.path
shadowLayer.shadowOffset = CGSize(width: 0.0, height: 2.0)
shadowLayer.shadowOpacity = 0.2
shadowLayer.shadowRadius = 3
self.layer.insertSublayer(shadowLayer, at: 0)
self.shadowLayer = shadowLayer
}
}
}
class RoundShadowView: UIView, RoundedShadowable {
var shadowLayer: CAShapeLayer?
private let cornerRadius: CGFloat
private let fillColor: UIColor
init(cornerRadius: CGFloat, fillColor: UIColor) {
self.cornerRadius = cornerRadius
self.fillColor = fillColor
super.init(frame: .zero)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layoutSubviews() {
super.layoutSubviews()
self.applyShadowOnce(withCornerRadius: self.cornerRadius, andFillColor: self.fillColor)
}
}
class RoundShadowButton: UIButton, RoundedShadowable {
var shadowLayer: CAShapeLayer?
private let cornerRadius: CGFloat
private let fillColor: UIColor
init(cornerRadius: CGFloat, fillColor: UIColor) {
self.cornerRadius = cornerRadius
self.fillColor = fillColor
super.init(frame: .zero)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layoutSubviews() {
super.layoutSubviews()
self.applyShadowOnce(withCornerRadius: self.cornerRadius, andFillColor: self.fillColor)
}
}