I've learned that we can change the UISwitch button appearance in its "on" state,
but is it also possible to change the color of the UISwitch in the "off" state?
My solution with #swift2:
let onColor = _your_on_state_color
let offColor = _your_off_state_color
let mSwitch = UISwitch(frame: CGRect.zero)
mSwitch.on = true
/*For on state*/
mSwitch.onTintColor = onColor
/*For off state*/
mSwitch.tintColor = offColor
mSwitch.layer.cornerRadius = mSwitch.frame.height / 2.0
mSwitch.backgroundColor = offColor
mSwitch.clipsToBounds = true
Result:
Try using this
yourSwitch.backgroundColor = [UIColor whiteColor];
youSwitch.layer.cornerRadius = 16.0;
All thanks to #Barry Wyckoff.
You can use the tintColor property on the switch.
switch.tintColor = [UIColor redColor]; // the "off" color
switch.onTintColor = [UIColor greenColor]; // the "on" color
Note this requires iOS 5+
Swift IBDesignable
import UIKit
#IBDesignable
class UISwitchCustom: UISwitch {
#IBInspectable var OffTint: UIColor? {
didSet {
self.tintColor = OffTint
self.layer.cornerRadius = 16
self.backgroundColor = OffTint
}
}
}
set class in Identity inspector
change color from Attributes inspector
Output
Here's a pretty good trick: you can just reach right into the UISwitch's subview that draws its "off" background, and change its background color. This works a lot better in iOS 13 than it does in iOS 12:
if #available(iOS 13.0, *) {
self.sw.subviews.first?.subviews.first?.backgroundColor = .green
} else if #available(iOS 12.0, *) {
self.sw.subviews.first?.subviews.first?.subviews.first?.backgroundColor = .green
}
Working 100% IOS 13.0 and Swift 5.0 switch both state color set same #ios13 #swift #swift5
#IBOutlet weak var switchProfile: UISwitch!{
didSet{
switchProfile.onTintColor = .red
switchProfile.tintColor = .red
switchProfile.subviews[0].subviews[0].backgroundColor = .red
}
}
The Best way to manage background color & size of UISwitch
For now it's Swift 2.3 code
import Foundation
import UIKit
#IBDesignable
class UICustomSwitch : UISwitch {
#IBInspectable var OnColor : UIColor! = UIColor.blueColor()
#IBInspectable var OffColor : UIColor! = UIColor.grayColor()
#IBInspectable var Scale : CGFloat! = 1.0
override init(frame: CGRect) {
super.init(frame: frame)
self.setUpCustomUserInterface()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.setUpCustomUserInterface()
}
func setUpCustomUserInterface() {
//clip the background color
self.layer.cornerRadius = 16
self.layer.masksToBounds = true
//Scale down to make it smaller in look
self.transform = CGAffineTransformMakeScale(self.Scale, self.Scale);
//add target to get user interation to update user-interface accordingly
self.addTarget(self, action: #selector(UICustomSwitch.updateUI), forControlEvents: UIControlEvents.ValueChanged)
//set onTintColor : is necessary to make it colored
self.onTintColor = self.OnColor
//setup to initial state
self.updateUI()
}
//to track programatic update
override func setOn(on: Bool, animated: Bool) {
super.setOn(on, animated: true)
updateUI()
}
//Update user-interface according to on/off state
func updateUI() {
if self.on == true {
self.backgroundColor = self.OnColor
}
else {
self.backgroundColor = self.OffColor
}
}
}
Swift 5:
import UIKit
extension UISwitch {
func set(offTint color: UIColor ) {
let minSide = min(bounds.size.height, bounds.size.width)
layer.cornerRadius = minSide / 2
backgroundColor = color
tintColor = color
}
}
Should you need other switches around your app, it might be also a good idea implementing #LongPham's code inside a custom class.
As others have pointed out, for the "off" state you'll need to change the background colour as well, since the default is transparent.
class MySwitch: UISwitch {
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
// Setting "on" state colour
self.onTintColor = UIColor.green
// Setting "off" state colour
self.tintColor = UIColor.red
self.layer.cornerRadius = self.frame.height / 2
self.backgroundColor = UIColor.red
}
}
Swift 4 easiest and fastest way to get it in 3 steps:
// background color is the color of the background of the switch
switchControl.backgroundColor = UIColor.white.withAlphaComponent(0.9)
// tint color is the color of the border when the switch is off, use
// clear if you want it the same as the background, or different otherwise
switchControl.tintColor = UIColor.clear
// and make sure that the background color will stay in border of the switch
switchControl.layer.cornerRadius = switchControl.bounds.height / 2
If you manually change the size of the switch (e.g., by using autolayout), you will have to update the switch.layer.cornerRadius too, e.g., by overriding layoutSubviews and after calling super updating the corner radius:
override func layoutSubviews() {
super.layoutSubviews()
switchControl.layer.cornerRadius = switchControl.bounds.height / 2
}
In Swift 4+:
off state:
switch.tintColor = UIColor.blue
on state:
switch.onTintColor = UIColor.red
The UISwitch offTintColor is transparent, so whatever is behind the switch shows through. Therefore, instead of masking the background color, it suffices to draw a switch-shaped image behind the switch (this implementation assumes that the switch is positioned by autolayout):
func putColor(_ color: UIColor, behindSwitch sw: UISwitch) {
guard sw.superview != nil else {return}
let onswitch = UISwitch()
onswitch.isOn = true
let r = UIGraphicsImageRenderer(bounds:sw.bounds)
let im = r.image { ctx in
onswitch.layer.render(in: ctx.cgContext)
}.withRenderingMode(.alwaysTemplate)
let iv = UIImageView(image:im)
iv.tintColor = color
sw.superview!.insertSubview(iv, belowSubview: sw)
iv.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
iv.topAnchor.constraint(equalTo: sw.topAnchor),
iv.bottomAnchor.constraint(equalTo: sw.bottomAnchor),
iv.leadingAnchor.constraint(equalTo: sw.leadingAnchor),
iv.trailingAnchor.constraint(equalTo: sw.trailingAnchor),
])
}
[But see now my other answer.]
2020 As of Xcode 11.3.1 & Swift 5
Here's the simplest way I've found of doing setting the UISwitch off-state colour with one line of code. Writing this here since this page is what came up first when I was looking and the other answers didn't help.
This is if I wanted to set the off state to be red, and can be added to the viewDidLoad() function:
yourSwitchName.subviews[0].subviews[0].backgroundColor = UIColor.red
Note - what this is actually doing is setting the background colour of the switch. This may influence the colour of the switch in the on-state too (though for me this wasn't a problem since I wanted the on and off state to be the same colour).
A solution for this:
Simply tie in the colours with an 'if else' statement inside your IBAction. If the switch is off, colour the background red. If the switch is on, leave the background clear so your chosen 'on' colour will display properly.
This goes inside the switch IBAction.
if yourSwitch.isOn == false {
yourSwitch.subviews[0].subviews[0].backgroundColor = UIColor.red
} else {
yourSwitch.subviews[0].subviews[0].backgroundColor = UIColor.clear
}
I found some behaviour where, upon the app resuming from background, the switch background would return to clear. To remedy this problem I simply added in the following code to set the colour every time the app comes to the foreground:
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
NotificationCenter.default.addObserver(
self,
selector: #selector(applicationWillEnterForeground(_:)),
name: UIApplication.willEnterForegroundNotification,
object: nil)
}
#objc func applicationWillEnterForeground(_ notification: NSNotification) {
yourSwitch.subviews[0].subviews[0].backgroundColor = UIColor.red
yourSwitch.subviews[0].subviews[0].backgroundColor = UIColor.red
}
Seems simpler than the other answers. Hope that helps!
More safe way in Swift 3 without magical 16pt values:
class ColoredBackgroundSwitch: UISwitch {
var offTintColor: UIColor {
get {
return backgroundColor ?? UIColor.clear
}
set {
backgroundColor = newValue
}
}
override func layoutSubviews() {
super.layoutSubviews()
let minSide = min(frame.size.height, frame.size.width)
layer.cornerRadius = ceil(minSide / 2)
}
}
objective c category to use on any UISwitch in project using code or storyboard:
#import <UIKit/UIKit.h>
#interface UISwitch (SAHelper)
#property (nonatomic) IBInspectable UIColor *offTint;
#end
implementation
#import "UISwitch+SAHelper.h"
#implementation UISwitch (SAHelper)
#dynamic offTint;
- (void)setOffTint:(UIColor *)offTint {
self.tintColor = offTint; //comment this line to hide border in off state
self.layer.cornerRadius = 16;
self.backgroundColor = offTint;
}
#end
XCode 11, Swift 5
I don't prefer using subViews, cause you never know when apple gonna change the hierarchy.
so I use mask view instead.
it works with iOS 12, iOS 13
private lazy var settingSwitch: UISwitch = {
let swt: UISwitch = UISwitch()
// set border color when isOn is false
swt.tintColor = .cloudyBlueTwo
// set border color when isOn is true
swt.onTintColor = .greenishTeal
// set background color when isOn is false
swt.backgroundColor = .cloudyBlueTwo
// create a mask view to clip background over the size you expected.
let maskView = UIView(frame: swt.frame)
maskView.backgroundColor = .red
maskView.layer.cornerRadius = swt.frame.height / 2
maskView.clipsToBounds = true
swt.mask = maskView
// set the scale to your expectation, here is around height: 34, width: 21.
let scale: CGFloat = 2 / 3
swt.transform = CGAffineTransform(scaleX: scale, y: scale)
swt.addTarget(self, action: #selector(switchOnChange(_:)), for: .valueChanged)
return swt
}()
#objc
func switchOnChange(_ sender: UISwitch) {
if sender.isOn {
// set background color when isOn is true
sender.backgroundColor = .greenishTeal
} else {
// set background color when isOn is false
sender.backgroundColor = .cloudyBlueTwo
}
}
I tested on IOS 14, set background as off color and onTintColor as On and works:
uiSwitch.onTintColor = UIColor.blue
uiSwitch.backgroundColor = UIColor.red
XCode 11, Swift 4.2
Starting with Matt's solution I added it to a custom, IBDesignable control. There is a timing issue in that didMoveToSuperview() is called before the offTintColor is set that needed to be handled.
#IBDesignable public class UISwitchCustom: UISwitch {
var switchMask: UIImageView?
private var observers = [NSKeyValueObservation]()
#IBInspectable dynamic var offTintColor : UIColor! = UIColor.gray {
didSet {
switchMask?.tintColor = offTintColor
}
}
override init(frame: CGRect) {
super.init(frame: frame)
initializeObservers()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
initializeObservers()
}
private func initializeObservers() {
observers.append(observe(\.isHidden, options: [.initial]) {(model, change) in
self.switchMask?.isHidden = self.isHidden
})
}
override public func didMoveToSuperview() {
addOffColorMask(offTintColor)
super.didMoveToSuperview()
}
private func addOffColorMask(_ color: UIColor) {
guard self.superview != nil else {return}
let onswitch = UISwitch()
onswitch.isOn = true
let r = UIGraphicsImageRenderer(bounds:self.bounds)
let im = r.image { ctx in
onswitch.layer.render(in: ctx.cgContext)
}.withRenderingMode(.alwaysTemplate)
let iv = UIImageView(image:im)
iv.tintColor = color
self.superview!.insertSubview(iv, belowSubview: self)
iv.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
iv.topAnchor.constraint(equalTo: self.topAnchor),
iv.bottomAnchor.constraint(equalTo: self.bottomAnchor),
iv.leadingAnchor.constraint(equalTo: self.leadingAnchor),
iv.trailingAnchor.constraint(equalTo: self.trailingAnchor),
])
switchMask = iv
switchMask?.isHidden = self.isHidden
}
}
all I finally used transform and layer.cornerRadius too.
But I have added translation to it to be center.
private func setSwitchSize() {
let iosSwitchSize = switchBlockAction.bounds.size
let requiredSwitchSize = ...
let transform = CGAffineTransform(a: requiredSwitchSize.width / iosSwitchSize.width, b: 0,
c: 0, d: requiredSwitchSize.height / iosSwitchSize.height,
tx: (requiredSwitchSize.width - iosSwitchSize.width) / 2.0,
ty: (requiredSwitchSize.height - iosSwitchSize.height) / 2.0)
switchBlockAction.layer.cornerRadius = iosSwitchSize.height / 2.0
switchBlockAction.transform = transform
}
And I did use backgroundColor and tintColor in designer.
Hope it helps.
I have a custom UICollectionViewCell and the problem that I'm facing is rendering the UI right after the cell is being loaded. You can see from the screenshot below, the first cell loads the dimView properly (it has a gradient background color) but any other cell does not.
Worth mentioning is that this view is visible once the user swipe the cell left or right (it creates a flip illusion where it hides an image and shows this view).
If the cell is reused, it's rendered properly, but not when it's initially loaded. Is there another method where I should call this function showDimViewAndCheckmark()??
#IBOutlet weak var backView: UIView!
override func awakeFromNib() {
super.awakeFromNib()
setUI()
}
override func layoutSubviews() {
super.layoutSubviews()
setUI()
}
override func prepareForReuse() {
super.prepareForReuse()
setUI()
}
func setUI() {
coverImageView.clipsToBounds = true
backView.setGradientBackground(colorOne: Colors.purpleDarker, colorTwo: Colors.purpleLight)
backView.layer.maskedCorners = [.layerMaxXMinYCorner, .layerMaxXMaxYCorner]
layer.shadowColor = UIColor.lightGray.cgColor
layer.shadowOffset = CGSize(width:1, height: 1)
layer.shadowRadius = 2.0
layer.shadowOpacity = 1.0
layer.masksToBounds = false
contentView.clipsToBounds = true
contentView.layer.cornerRadius = 10
contentView.layer.maskedCorners = [.layerMaxXMinYCorner, .layerMaxXMaxYCorner]
}
draw(_ rect: CGRect)
Try this method.
I have a collectionView cell that should either display an image or an icon that is generated as a custom UIView (lets say IconView).
Currently, I implemented this by adding an UIImageView and an IconView as subviews to a container view.
When an image is provided, the image property of UIImageView is simply updated. When a new IconView is provided it is currently always added as a subview to the container view. Therefore, before adding, it is first checked whether an IconView has already been added, and if so it is removed.
Although this implementation works, it is not very elegant and seems not efficient since it results in scrolling issues when the number of rows increase.
Would there be a better (more efficient) way to implement this for a single CollectionViewCell?
class CustomCell: UICollectionViewCell {
internal var image: UIImage? {
didSet {
self.imageView.image = image!
}
}
internal var iconView: IconView? {
didSet {
if !(self.iconContainerView.subviews.flatMap{ $0 as? IconView}.isEmpty) {
self.iconView!.removeFromSuperview()
}
self.iconView!.translatesAutoresizingMaskIntoConstraints = false
self.iconContainerView.addSubview(self.iconView!)
self.image = nil
}
}
fileprivate var imageView: UIImageView!
fileprivate var iconContainerView: UIView!
fileprivate var layoutConstraints = [NSLayoutConstraint]()
override init(frame: CGRect) {
super.init(frame: frame)
// ContainerView
self.iconContainerView = UIView()
self.iconContainerView.translatesAutoresizingMaskIntoConstraints = false
self.contentView.addSubview(self.iconContainerView)
// ImageView
self.imageView = UIImageView()
self.imageView.translatesAutoresizingMaskIntoConstraints = false
self.iconContainerView.addSubview(self.imageView)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layoutSubviews() {
super.layoutSubviews()
self.iconContainerView.leadingAnchor.constraint(equalTo: self.contentView.leadingAnchor).isActive = true
self.iconContainerView.widthAnchor.constraint(equalToConstant: 60).isActive = true
self.iconContainerView.heightAnchor.constraint(equalToConstant: 60).isActive = true
self.iconContainerView.centerYAnchor.constraint(equalTo: self.contentView.centerYAnchor).isActive = true
// Deactivate non-reusable constraints
_ = self.layoutConstraints.map { $0.isActive = false }
self.layoutConstraints = [NSLayoutConstraint]()
if let iconView = self.iconView {
self.imageView.isHidden = true
self.layoutConstraints.append(iconView.centerYAnchor.constraint(equalTo: self.iconContainerView.centerYAnchor))
self.layoutConstraints.append(iconView.centerXAnchor.constraint(equalTo: self.iconContainerView.centerXAnchor))
self.layoutConstraints.append(iconView.heightAnchor.constraint(equalToConstant: 40))
self.layoutConstraints.append(iconView.widthAnchor.constraint(equalToConstant: 40))
} else {
self.imageView.isHidden = false
self.iconView?.isHidden = true
self.layoutConstraints.append(self.imageView.leadingAnchor.constraint(equalTo: self.iconContainerView.leadingAnchor))
self.layoutConstraints.append(self.imageView.trailingAnchor.constraint(equalTo: self.iconContainerView.trailingAnchor))
self.layoutConstraints.append(self.imageView.topAnchor.constraint(equalTo: self.iconContainerView.topAnchor))
self.layoutConstraints.append(self.imageView.bottomAnchor.constraint(equalTo: self.iconContainerView.bottomAnchor))
}
_ = self.layoutConstraints.map {$0.isActive = true}
}
}
Don't ad and remove the IconView when setting. Add both in the same spot and change the isHidden, alpha, or opacity or bringSubviewToFront. This is much less main thread intensive.
I want to create a Circle image view for my profile avatar. I have tried this:-
class CircleImageView: UIImageView {
override func draw(_ rect: CGRect) {
// Drawing code
layer.masksToBounds = true
layer.cornerRadius = min(rect.width/2 , rect.height/2)
clipsToBounds = true
}
}
But its not working.
An extension will be great to set corner or do round image:
extension UIImageView {
func setRadius(radius: CGFloat? = nil) {
self.layer.cornerRadius = radius ?? self.frame.width / 2;
self.layer.masksToBounds = true;
}
}
Use:
imgview.setRadius(radius: 10)
imgview.setRadius() //default frame.width/2
Draw function is for drawing not changing layer.
Use layoutSubviews
override func layoutSubviews() {
super.layoutSubviews()
layer.masksToBounds = true
layer.cornerRadius = min(self.frame.width/2 , self.frame.height/2)
clipsToBounds = true
}
You are adding the code in the wrong place, drawRect: is not really the right method to do such a functionality for editing the layer, you can achive this by:
Editing the layer when init(frame:) the imageView (also, adding the same functionality in init(coder:) because it should work for both approaches: programmatically and via storyboard):
class CircleImageView: UIImageView {
override init(frame: CGRect) {
super.init(frame: frame)
setupCircleLayer()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setupCircleLayer()
}
private func setupCircleLayer() {
layer.masksToBounds = true
layer.cornerRadius = min(frame.width/2 , frame.height/2)
clipsToBounds = true
}
}
Or as #Mohammadalijf suggested in his answer by overriding layoutSubviews() method:
class CircleImageView: UIImageView {
override func layoutSubviews() {
super.layoutSubviews()
layer.masksToBounds = true
layer.cornerRadius = min(frame.width/2 , frame.height/2)
clipsToBounds = true
backgroundColor = UIColor.black
}
}
It does the desired fucntionality that you are asking for, but note that:
Subclasses can override this method as needed to perform more precise
layout of their subviews. You should override this method only if the
autoresizing and constraint-based behaviors of the subviews do not
offer the behavior you want. You can use your implementation to set
the frame rectangles of your subviews directly.
i.e, it is related to updating the layout of the view, check the documentation for more information; That's why I prefer to do it in the init methods.
I've been trying to search for a swift version of a solution to no avail. I was wondering how I can make my view controller scroll content. Right now it's just static, and there's more content below, which I'm unable to scroll.
class ProfileViewController: UIViewController, UICollectionViewDelegateFlowLayout {
let postsId = "postsId"
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(profileContainerView)
view.addSubview(profileTabCollection)
view.addSubview(containerForCollectionView)
view.addSubview(scrollView)
scrollView.widthAnchor.constraintEqualToConstant(view.frame.size.width).active = true
scrollView.heightAnchor.constraintEqualToConstant(view.frame.size.height).active = true
scrollView.centerXAnchor.constraintEqualToAnchor(view.centerXAnchor).active = true
scrollView.centerYAnchor.constraintEqualToAnchor(view.centerYAnchor).active = true
scrollView.userInteractionEnabled = true
scrollView.scrollEnabled = true
scrollView.delegate = self
containerForCollectionView.widthAnchor.constraintEqualToConstant(scrollView.frame.size.width).active = true
containerForCollectionView.heightAnchor.constraintEqualToConstant(scrollView.frame.size.height).active = true
containerForCollectionView.topAnchor.constraintEqualToAnchor(profileTabCollection.bottomAnchor).active = true
profileContainerView.widthAnchor.constraintEqualToConstant(scrollView.frame.size.width).active = true
profileContainerView.heightAnchor.constraintEqualToConstant(250).active = true
profileContainerView.centerXAnchor.constraintEqualToAnchor(scrollView.centerXAnchor).active = true
profileContainerView.topAnchor.constraintEqualToAnchor(topLayoutGuide.bottomAnchor).active = true
profileTabCollection.widthAnchor.constraintEqualToAnchor(profileContainerView.widthAnchor).active = true
profileTabCollection.heightAnchor.constraintEqualToConstant(50).active = true
profileTabCollection.centerXAnchor.constraintEqualToAnchor(view.centerXAnchor).active = true
profileTabCollection.topAnchor.constraintEqualToAnchor(profileContainerView.bottomAnchor).active = true
}
lazy var scrollView: UIScrollView = {
let sv = UIScrollView(frame: CGRectMake(0,0,1024,768))
sv.contentSize = CGSizeMake(self.view.frame.size.width, self.view.frame.size.height * 3)
sv.translatesAutoresizingMaskIntoConstraints = false
return sv
}()
let containerForCollectionView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.purpleColor()
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
There are numerous reasons why this won't work. Since you don't provide enough information to be sure what it is, i'd recommend reading this (especially Duncan C's answer) carefully.
how do i alter the position of a UIImage inside a imageView in SWIFT
Write these lines in override layoutSubviews() method.
scrollView.widthAnchor.constraintEqualToAnchor(view.widthAnchor).active = true
scrollView.heightAnchor.constraintEqualToAnchor(view.heightAnchor).active = true
Make sure you created UIScrollView in your UIViewController, otherwise it won't work for sure.
If you are using swift 2.0 and you have used "UIScrollViewDelegate"- you need to add this method
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
return imgview
}
And if you are using swift 3.0 - you need this function
func viewForZooming( in scrollView: UIScrollView) -> UIView? {
return imgview
}