I'm trying to add drop shadow to UIButton but I want to have only the shadow for UIButton bottom shadow only not for its image and title. I followed UIButton bottom shadow but it didn't work.
Basically, here is what I'm having right now:
And here is what I want to have:
This is my current code:
button.layer.borderWidth = 0.5
button.layer.borderColor = UIColor.gray.cgColor
button.layer.shadowColor = UIColor.black.cgColor
button.layer.shadowOffset = CGSize(width: 0, height: 2)
button.layer.shadowOpacity = 1.0
button.layer.shadowRadius = 0
button.layer.masksToBounds = false
Please help. Thanks in advance.
Checkout below lines of code
btn.setImage(UIImage(named: "Unknown.jpg"), for: .normal)
btn.imageView?.layer.shadowColor = UIColor.blue.cgColor
btn.imageView?.layer.shadowOffset = CGSize(width: 1, height: 1)
btn.imageView?.layer.shadowOpacity = 1.0
btn.imageView?.layer.shadowRadius = 5
btn.imageView?.layer.masksToBounds = false
btn.setTitle(" hello", for: .normal)
btn.titleLabel?.layer.shadowColor = UIColor.black.cgColor
btn.titleLabel?.layer.shadowOffset = CGSize(width: 1, height: 1)
btn.titleLabel?.layer.shadowOpacity = 1.0
btn.titleLabel?.layer.shadowRadius = 3
btn.titleLabel?.layer.masksToBounds = false
btn.backgroundColor = UIColor.red
Hi dear best way to apply shadow for transparent button you just need to embed your button in view and apply shadow effect on that view.
Like I have done below:
yourButtonView.layer.borderWidth = 0.5
yourButtonView.layer.borderColor = UIColor.gray.cgColor
yourButtonView.layer.shadowColor = UIColor.black.cgColor
yourButtonView.layer.shadowOffset = CGSize(width: 0, height: 2)
yourButtonView.layer.shadowOpacity = 1.0
yourButtonView.layer.shadowRadius = 0
yourButtonView.layer.masksToBounds = false
Please use the below extension for creating shadow
extension UIView {
func addshadow(top: Bool,
left: Bool,
bottom: Bool,
right: Bool
) {
let shadowRadius: CGFloat = 2.0
self.layer.masksToBounds = false
self.layer.shadowOffset = CGSize(width: 0.0, height: 0.0)
self.layer.shadowRadius = shadowRadius
self.layer.shadowOpacity = 0.3
let path = UIBezierPath()
var x: CGFloat = 0
var y: CGFloat = 0
var viewWidth = self.frame.width
var viewHeight = self.frame.height
if (!top) {
y+=(shadowRadius+1)
}
if (!bottom) {
viewHeight-=(shadowRadius+1)
}
if (!left) {
x+=(shadowRadius+1)
}
if (!right) {
viewWidth-=(shadowRadius+1)
}
path.move(to: CGPoint(x: x, y: y))
path.addLine(to: CGPoint(x: x, y: viewHeight))
path.addLine(to: CGPoint(x: viewWidth, y: viewHeight))
path.addLine(to: CGPoint(x: viewWidth, y: y))
path.close()
self.layer.shadowPath = path.cgPath
}
}
use -
button.addshadow(top: false, left: false, bottom: true, right: false)
I want to add shadow(it is not like default it somehow clouded and blurred) for my UIView like below
I have written an extension as
func addShadow(color: UIColor = UIColor.black, opacity: Float = 0.9, radius: CGFloat = 1, scale: Bool = true) {
self.layer.masksToBounds = false
self.layer.shadowColor = color.cgColor
self.layer.shadowOpacity = opacity
self.layer.shadowRadius = radius
self.layer.shadowPath = UIBezierPath(rect: self.bounds).cgPath
self.layer.shouldRasterize = true
self.layer.rasterizationScale = scale ? UIScreen.main.scale : 1
}
Output:
but not able to get the exact output.
Your help will be thankful.
I believe that you also need to set clipsToBounds.
self.clipsToBounds = false
I use IBInspectable to treat all the views in my app. Try it out
extension UIView {
#IBInspectable var cornerRadius: CGFloat {
set {
layer.cornerRadius = newValue
}
get {
return layer.cornerRadius
}
}
#IBInspectable var borderWidth: CGFloat {
set {
layer.borderWidth = newValue
}
get {
return layer.borderWidth
}
}
#IBInspectable var borderColor: UIColor? {
set {
layer.borderColor = newValue?.cgColor
}
get {
return UIColor(cgColor: layer.borderColor!)
}
}
#IBInspectable var shadowOffset: CGSize {
set {
layer.shadowOffset = newValue
}
get {
return layer.shadowOffset
}
}
#IBInspectable var shadowOpacity: Float {
set {
layer.shadowOpacity = newValue
}
get {
return layer.shadowOpacity
}
}
#IBInspectable var shadowRadius: CGFloat {
set {
layer.shadowRadius = newValue
}
get {
return layer.shadowRadius
}
}
#IBInspectable var shadowColor: UIColor? {
set {
layer.shadowColor = newValue?.cgColor
}
get {
return UIColor(cgColor: layer.shadowColor!)
}
}
}
in your case you should fix shadowOffset property.
You should disable clipToBounds in your 'containerView' (view that has your shadow dropping view placed as a subview)
Take a look at an example:
import UIKit
extension UIView {
func addShadow(color: UIColor = UIColor.black, opacity: Float = 0.9, radius: CGFloat = 1, scale: Bool = true) {
self.layer.masksToBounds = false
self.layer.shadowColor = color.cgColor
self.layer.shadowOpacity = opacity
self.layer.shadowRadius = radius
self.layer.shadowPath = UIBezierPath(rect: self.bounds).cgPath
self.layer.shouldRasterize = true
self.layer.rasterizationScale = scale ? UIScreen.main.scale : 1
}
}
let shadowedView = UIView(frame: CGRect(x: 50, y: 50, width: 200, height: 100))
shadowedView.backgroundColor = .blue
shadowedView.layer.cornerRadius = 15.0
shadowedView.addShadow()
let mainView = UIView(frame: CGRect(x: 0, y: 0, width: 300, height:200))
mainView.backgroundColor = .white
mainView.addSubview(shadowedView)
here I will add a view container and enable clipToBounds :
let shadowedView = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 100))
shadowedView.backgroundColor = .blue
shadowedView.layer.cornerRadius = 15.0
shadowedView.addShadow()
let containerView = UIView(frame: CGRect(x: 50, y: 50, width: 200, height: 100))
containerView.addSubview(shadowedView)
containerView.clipsToBounds = true
let mainView = UIView(frame: CGRect(x: 0, y: 0, width: 300, height: 200))
mainView.backgroundColor = .white
mainView.addSubview(containerView)
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)
}
}
I do not understand how to remove a shadow that was added to a view.
I add to my view in initWithFrame a shadow in this way:
self.layer.borderWidth = 2;
self.layer.borderColor = [UIColor clearColor].CGColor;
self.backgroundColor = [UIColor greenColor];
[self.layer setCornerRadius:8.0f];
CALayer *layer = self.layer;
layer.shadowOffset = CGSizeMake(2, 2);
layer.shadowColor = [[UIColor blackColor] CGColor];
layer.cornerRadius = 8.0f;
layer.shadowRadius = 3.0f;
layer.shadowOpacity = 0.80f;
layer.shadowPath = [[UIBezierPath bezierPathWithRect:layer.bounds] CGPath];
After in the execution of the app I want to remove the shadow from this view. I've tried using:
layer.hidden = YES;
or
self.layer.hidden = YES;
but this hides the view completely, not just the added shadow.
Is there a way to retrieve the added shadow from a view and then hide it?
Thanks!
I guess you could use the shadowOpacity property of your CALayer.
So this should work:
self.layer.shadowOpacity = 0;
See the CALayer's shadowOpacity documentation page
And to show your shadow use:
self.layer.shadowOpacity = 1.0;
Sorry, not sure the correct way, but have you tried changing the properties of the layer shadow? For example, one of these;
layer.shadowOffset = CGSizeMake(0, 0);
layer.shadowColor = [[UIColor clearColor] CGColor];
layer.cornerRadius = 0.0f;
layer.shadowRadius = 0.0f;
layer.shadowOpacity = 0.00f;
Swift 4.2
I am using this in my code for labels and navigation bar.
extension UIView {
func shadow(_ height: Int = 5) {
self.layer.masksToBounds = false
self.layer.shadowRadius = 4
self.layer.shadowOpacity = 1
self.layer.shadowColor = UIColor.gray.cgColor
self.layer.shadowOffset = CGSize(width: 0 , height: height)
}
func removeShadow() {
self.layer.shadowOffset = CGSize(width: 0 , height: 0)
self.layer.shadowColor = UIColor.clear.cgColor
self.layer.cornerRadius = 0.0
self.layer.shadowRadius = 0.0
self.layer.shadowOpacity = 0.0
}
}
I tried the other answers, the only thing that worked for me was to toggle layer.masksToBounds to true/false
lazy var myView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
view.backgroundColor = .white
view.layer.cornerRadius = 5
view.layer.shadowColor = UIColor.black.cgColor
view.layer.shadowOpacity = 3
view.layer.shadowOffset = .zero
view.layer.shadowRadius = 5
return view
}()
func showShadow() {
myView.layer.masksToBounds = false
}
func hideShadow() {
myView.layer.masksToBounds = true
}
the "layer" that you are trying to make hidden is the layer of the object that you are having a shadow to it's not a visible aspect.. only the objects with in the layer... it's rather confusing to conceptualize anyways, the only way to remove the shadow is to undo what you originally did, which was suggested above, there is no defined property that you can just toggle a bool and make the shadow go away
Swift 5.+
My solution was to add a shadowBackgroundView, which has a removable shadowLayer. In this way I could easyly remove the layer without resetting the shadow properties.
class ViewController: UIViewController {
private let shadowBackgroundView: UIView = {
let view = UIView(frame: CGRect(x: 100, y: 100, width: 100, height: 100))
view.layer.masksToBounds = false
return view
}()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
view.addSubview(shadowBackgroundView)
// the view you want to add the shadow
let dummyView = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
dummyView.backgroundColor = .red
shadowBackgroundView.addSubview(dummyView)
let addShadowButton = UIButton(frame: CGRect(x: 100, y: 300, width: 140, height: 50))
addShadowButton.backgroundColor = .blue
addShadowButton.setTitle("Add Shadow", for: .normal)
addShadowButton.addTarget(self, action: #selector(addShadow), for: .touchUpInside)
let removeShadowButton = UIButton(frame: CGRect(x: 100, y: 450, width: 140, height: 50))
removeShadowButton.backgroundColor = .blue
removeShadowButton.setTitle("Remove Shadow", for: .normal)
removeShadowButton.addTarget(self, action: #selector(removeShadow), for: .touchUpInside)
view.addSubview(addShadowButton)
view.addSubview(removeShadowButton)
}
#objc
func addShadow() {
let shadowLayer = CALayer()
shadowLayer.name = "ShadowLayer"
shadowLayer.shadowColor = UIColor.black.cgColor
shadowLayer.shadowOpacity = 1
shadowLayer.shadowOffset = .zero
shadowLayer.shadowRadius = 10
shadowLayer.shadowPath = UIBezierPath(rect: shadowBackgroundView.bounds).cgPath
// Otherwise the shadow will appear above the dummyView
shadowLayer.zPosition = -1
shadowBackgroundView.layer.addSublayer(shadowLayer)
}
#objc
func removeShadow() {
// Alternatively, you could also create the shadowLayer as a property, so you could call shadowLayer.removeFromSuperLayer()
shadowBackgroundView.layer.sublayers?.first { $0.name == "ShadowLayer" }?.removeFromSuperlayer()
}
}
As a Note, for the UITableViewCell, you wouldnt need to add a shadowBackgroundView, but you could add the shadowLayer directly to cell.view.layer, which serves as the backgroundView for the cell.contentView.
Swift 4.2
Just to add to the other answers, you could change the opacity through animation:
#IBAction func btnDidTap(_ sender: UICustomGestureRecognizer) {
guard let view = sender.view else {return}
if sender.state == .began {
UIView.animate(withDuration: 0.3,
animations: {
view.layer.shadowOpacity = 0
})
} else if sender.state == .ended {
UIView.animate(withDuration: 0.3,
animations: {
view.layer.shadowOpacity = 1
})
}
}