I have one UIScrollView (IBOutlet) with success constraint inside a storyboard. then I programmatically create UIButton and put them as a subview to UIScrollView. how do I programmatically set these UIButton constraints so their height and size would tally with their super view?
class ViewController: UIViewController {
#IBOutlet weak var aScrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
var xCoord: CGFloat = 5
let yCoord: CGFloat = 5
let buttonWidth:CGFloat = 100
let buttonHeight: CGFloat = 100
let gapBetweenButtons: CGFloat = 10
var itemCount = 0
// MARK: - filter buttons
for i in 0..<6 {
itemCount = i
let aButton = UIButton(type: .custom)
aButton.frame = CGRect(x: xCoord, y: yCoord, width: buttonWidth, height: buttonHeight)
aButton.backgroundColor = UIColor.blue
aButton.layer.cornerRadius = aButton.frame.size.width / 2
aButton.clipsToBounds = true
xCoord += buttonWidth + gapBetweenButtons
aScrollView.addSubview(aButton)
}
}
Try this --
This is just an idea about how to add constraint programmatically.
For more understanding you can go through below link - https://developer.apple.com/reference/appkit/nslayoutanchor
let myButton = UIButton()
self.aScrollView.addSubview(myButton)
self.view.translatesAutoresizingMaskIntoConstraints = false
let margins = self.view.layoutMarginsGuide
myButton.leadingAnchor.constraint(equalTo: forView. aScrollView.leadingAnchor, constant: 5).active = true
myButton.topAnchor.constraint(equalTo: forView. aScrollView.topAnchor, constant: 5).active = true
myButton.heightAnchor.constraintEqualToConstant(100.0).active = true
myButton.widthAnchor.constraintEqualToConstant(100.0).active = true
Change your code to:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
var xCoord: CGFloat = 5
let yCoord: CGFloat = 5
let gapBetweenButtons: CGFloat = 10
let buttonCount = 6
let buttonWidth = (aScrollView.frame.width - CGFloat(buttonCount - 1) * gapBetweenButtons - xCoord - xCoord) / CGFloat(buttonCount) // - (2 * xCoord) = - (margin left + margin right).
let buttonHeight = buttonWidth
var itemCount = 0
// MARK: - filter buttons
for i in 0..<buttonCount {
itemCount = i
let aButton = UIButton(type: .custom)
aButton.frame = CGRect(x: xCoord, y: yCoord, width: buttonWidth, height: buttonHeight)
aButton.backgroundColor = UIColor.blue
aButton.layer.cornerRadius = aButton.frame.size.width / 2
aButton.clipsToBounds = true
xCoord += buttonWidth + gapBetweenButtons
aScrollView.addSubview(aButton)
}
}
This is how to do it. I made a video tutorial for you add unbutton programmatically to scrollview in iOS, swift. please refer the link.
add a scrollview (add constraints -> top, bottom, left, right).
then add a view to your scroll view (add constraints -> top, bottom, left, right, width, height and set width and height as you need. explain in the video)
add those two views as subviews.
then add the button and its constraints programmatically.
follow the video tutorial. add UIButton(outlet) to scrollview programmatically
For my first challenge using UIScrollView I modified this example to make UIScrollView display not just another background colour but another UIView and UILabel on each page. But I could have just as easily chosen to display objects like UITableView, UIButton or UIImage.
Potentially, UIScrollView could be much more than a giant content view where users scroll from one part to the next, e.g., some pages might have a UIButton that takes a user to a specific page, the same way we use books.
Code Improvements
My question has evolved since I first posted it. Initially the labels piled up on page 1 (as shown below) but this has now been corrected. I also included this extension to make the font larger.
Further improvement ?
As the code evolved I became more aware of other issues e.g. iPhone 5 images (below) appear differently on iPhone 7 where the UILabel is centred but not the UIView. So my next challenge is possibly to learn how to combine UIScrollView with Autolayout. I invite anyone to spot other things that might be wrong.
ViewController.swift (corrected)
import UIKit
class ViewController: UIViewController,UIScrollViewDelegate {
let scrollView = UIScrollView(frame: CGRect(x: 0, y: 0, width: 320, height: 480))
var views = [UIView]()
var lables = [UILabel]()
var colors:[UIColor] = [UIColor.red, UIColor.magenta, UIColor.blue, UIColor.cyan, UIColor.green, UIColor.yellow]
var frame: CGRect = CGRect.zero
var pageControl: UIPageControl = UIPageControl(frame: CGRect(x: 50, y: 500, width: 200, height: 50))
override func viewDidLoad() {
super.viewDidLoad()
initialiseViewsAndLables()
configurePageControl()
scrollView.delegate = self
self.view.addSubview(scrollView)
for index in 0..<colors.count {
frame.origin.x = self.scrollView.frame.size.width * CGFloat(index)
frame.size = self.scrollView.frame.size
self.scrollView.isPagingEnabled = true
views[index].frame = frame
views[index].backgroundColor = colors[Int(index)]
views[index].layer.cornerRadius = 20
views[index].layer.masksToBounds = true
lables[index].frame = frame
lables[index].center = CGPoint(x: (view.frame.midX + frame.origin.x), y: view.frame.midY)
lables[index].text = String(index + 1)
lables[index].defaultFont = UIFont(name: "HelveticaNeue", size: CGFloat(200))
lables[index].textAlignment = .center
lables[index].textColor = .black
let subView1 = views[index]
let subView2 = lables[index]
self.scrollView .addSubview(subView1)
self.scrollView .addSubview(subView2)
}
print(views, lables)
self.scrollView.contentSize = CGSize(width: self.scrollView.frame.size.width * CGFloat(colors.count), height: self.scrollView.frame.size.height)
pageControl.addTarget(self, action: Selector(("changePage:")), for: UIControlEvents.valueChanged)
}
func initialiseViewsAndLables() {
// Size of views[] and lables[] is linked to available colors
for index in 0..<colors.count {
views.insert(UIView(), at:index)
lables.insert(UILabel(), at: index)
}
}
func configurePageControl() {
// Total number of available pages is based on available colors
self.pageControl.numberOfPages = colors.count
self.pageControl.currentPage = 0
self.pageControl.backgroundColor = getColour()
self.pageControl.pageIndicatorTintColor = UIColor.black
self.pageControl.currentPageIndicatorTintColor = UIColor.green
self.view.addSubview(pageControl)
}
func getColour() -> UIColor {
let index = colors[pageControl.currentPage]
return (index)
}
func changePage(sender: AnyObject) -> () {
scrollView.setContentOffset(CGPoint(x: CGFloat(pageControl.currentPage) * scrollView.frame.size.width, y: 0), animated: true)
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let pageNumber = round(scrollView.contentOffset.x / scrollView.frame.size.width)
pageControl.currentPage = Int(pageNumber)
pageControl.backgroundColor = getColour()
}
}
Extension
extension UILabel{
var defaultFont: UIFont? {
get { return self.font }
set { self.font = newValue }
}
}
The centre point of the lable on each frame must be offset by the origin of the content view (as Baglan pointed out). I've modified the following line of code accordingly.
lables[Int(index)].center = CGPoint(x: (view.frame.midX + frame.origin.x), y: view.frame.midY)
I'm creating a game where the player has the possibility to add several players on a view controller :
Actually, I can add a new player and remove it :
The problem appears when I remove a player :
I want player 2 and player 3 goes below the textField "Name when I remove a player. How can I do this ?
ViewDidLoad :
// MARK: ADD BUTTON
let addButtonSize = CGSize(width: topPartSize.height, height: topPartSize.height)
let addButton = UIButton(frame: CGRect(x: enterPlayerPartSize.width - addButtonSize.width, y: 0, width: addButtonSize.width, height: addButtonSize.height))
addButton.titleLabel!.font = UIFont.fontAwesomeOfSize(addButtonSize.height / 2)
addButton.setTitle(String.fontAwesomeIconWithName(.Plus), forState: .Normal)
addButton.setTitleColor(UIColor.whiteColor(), forState: .Normal)
addButton.setTitleColor(UIColor(red: 1, green: 1, blue: 1, alpha: 0.5), forState: .Highlighted)
addButton.titleLabel?.textAlignment = .Center
addButton.layer.zPosition = 3
addButton.addTarget(self, action: #selector(PlayersViewController.addPlayer(_:)), forControlEvents: .TouchUpInside)
enterPlayerPart.addSubview(addButton)
// MARK: TEXT FIELD
let textFieldSize = CGSize(width: enterPlayerPartSize.width - playerIconSize.width - addButtonSize.width, height: enterPlayerPartSize.height)
textField = UITextField(frame: CGRect(x: playerIconSize.width, y: 0, width: textFieldSize.width, height: textFieldSize.height))
textField.font = UIFont(name: "Avenir-Light", size: textFieldSize.height / 2)
textField.attributedPlaceholder = NSAttributedString(string:"Name", attributes:[NSForegroundColorAttributeName: UIColor(red: 1, green: 1, blue: 1, alpha: 0.5)])
textField.textColor = UIColor.whiteColor()
textField.textAlignment = NSTextAlignment.Left
textField.returnKeyType = UIReturnKeyType.Done
textField.delegate = self
enterPlayerPart.addSubview(textField)
Functions :
// MARK: ADD PLAYER - FUNCTION
func addPlayer(sender: UIButton) {
if textField.text == nil || textField.text == "" {
print("Enter player name")
} else {
createNewPlayer(textField.text!)
}
}
// MARK: CREATE NEW PLAYER - FUNCTION
func createNewPlayer(playerName: String) {
let playerPartSize = CGSize(width: screenWidth, height: screenHeight * 0.1)
let playerPart = UIView(frame: CGRect(x: 0, y: playerPartSize.height * CGFloat(playersCount), width: playerPartSize.width, height: playerPartSize.height))
scrollView.addSubview(playerPart)
// PLAYER ICON
let playerIconSize = CGSize(width: playerPartSize.height, height: playerPartSize.height)
let playerIcon = UILabel(frame: CGRect(x: 0, y: 0, width: playerIconSize.width, height: playerIconSize.height))
playerIcon.font = UIFont.fontAwesomeOfSize(topPartSize.height / 2)
playerIcon.text = String.fontAwesomeIconWithName(.User)
playerIcon.textAlignment = .Center
playerIcon.textColor = UIColor.whiteColor()
playerPart.addSubview(playerIcon)
// REMOVE BUTTON
let removeButtonSize = playerIconSize
let removeButton = UIButton(frame: CGRect(x: playerPartSize.width - removeButtonSize.width, y: 0, width: playerIconSize.width, height: playerIconSize.height))
removeButton.titleLabel!.font = UIFont.fontAwesomeOfSize(removeButtonSize.height / 2)
removeButton.setTitle(String.fontAwesomeIconWithName(.Trash), forState: .Normal)
removeButton.setTitleColor(UIColor.whiteColor(), forState: .Normal)
removeButton.setTitleColor(UIColor(red: 1, green: 1, blue: 1, alpha: 0.5), forState: .Highlighted)
removeButton.titleLabel?.textAlignment = .Center
removeButton.addTarget(self, action: #selector(PlayersViewController.removePlayer(_:)), forControlEvents: .TouchUpInside)
playerPart.addSubview(removeButton)
// PLAYER NAME
let playerNameSize = CGSize(width: playerPartSize.width - playerIconSize.width - removeButtonSize.width, height: playerPartSize.height)
let playerNameLabel = UILabel(frame: CGRect(x: playerIconSize.width, y: 0, width: playerNameSize.width, height: playerNameSize.height))
playerNameLabel.font = UIFont(name: "Avenir-Light", size: playerNameSize.height / 2)
playerNameLabel.text = playerName
playerNameLabel.textAlignment = .Left
playerNameLabel.textColor = UIColor.whiteColor()
playerPart.addSubview(playerNameLabel)
// BOTTOM LINE
let bottomLineHeight = playerPartSize.height / 50
let bottomLine = UIView(frame: CGRect(x: 0, y: playerPartSize.height - bottomLineHeight, width: playerPartSize.width, height: bottomLineHeight))
bottomLine.backgroundColor = UIColor(hexColor: 0x1B1B1B)
playerPart.addSubview(bottomLine)
// PLAYERS COUNT ++
playersCount += 1
}
Thanks for your help !
You have two ways to perform it :
You seem using reusable components, so you should have a look on UITableView / UICollectionView. It will manage memory usage, and components layout
If you dont want to migrate to theses components, it recommend you to store all your player views in an array, and relayout them after an add/remove operation
something like :
var players : [UIView] = []
func createNewPlayer(playerName: String) {
//Do your stuff here
players.append(newCreatedPalyerView)
layout()
}
func layout() {
var yPosition = 0
for view in players {
view.frame.origin.y = yPosition
yPosition += view.frame.size.height
}
}
func removePlayer(player : UIView) {
self.players.remove(player)
self.layout()
}
You need to manage your scenario something like below :
First take all the UI of one player in one UIView. So you should have all your one player's stuff(playername label, remove button etc) in one view. (i think you have it in playerPart - that`s cool)
Now you are adding that playerPart directly in scrollview i think, If it is like that then you should not do like this. You should have one UIView of same size of scrollview in scrollview(same as content size of scrollview) and you should add playerPart to that view.
Now you can get all subviews of that view in array something like :
NSArray *viewArr = [tempView subviews];
Assume tempView is vied over scrollview as i have mentioned above,
you can get subview of scrollview also by calling same method.
Now for example you have four player(four view) in view (temp view or scrollview if tempview is not added on it) and you click remove on player 3 then you can get index of that object from that view array. for example,
you have array of total view which you have get from
NSArray *viewArr = [tempView subviews];
then you can get index of player3 i.e view3 like,
int index = [viewArr indexOfObject:player3];
now make one method or function which is called after every removed call and pass that index as parameter in that method.
In that method take one for loop, which start from this index and run till last object (view) of this viewArr. Decrease y of every coming view in this for loop so your all view which was belowed removed view will goes up.
Here is one my method i was using in my one project to remove view and manage other accordingly :
#pragma mark UpdateFrameOfViews
-(void)updateFrameOfViewWithTag : (int) myTag increament : (CGFloat)increament fromIndex : (int)index{
CustomSubClassView *tempView = [self.view viewWithTag:myTag];
UIScrollView *tempScroll = (UIScrollView*)[tempView superview];
NSArray *subViews = [tempView subviews];
BOOL status = NO;
for (int i = index; i <= subViews.count; i++) {
if (i < subViews.count) {
UIView *tempView1 = [subViews objectAtIndex:i];
CGFloat newY = tempView1.frame.origin.y + increament;
CGRect newFrame = CGRectMake(tempView1.frame.origin.x, newY, tempView1.frame.size.width, tempView1.frame.size.height);
tempView1.frame = newFrame;
status = YES;
}
if (index == subViews.count && i == subViews.count) {
// UIView *tempView1 = [subViews lastObject];
//
// CGFloat newY = tempView1.frame.origin.y + increament;
//
// CGRect newFrame = CGRectMake(tempView1.frame.origin.x, newY, tempView1.frame.size.width, tempView1.frame.size.height);
//
// tempView1.frame = newFrame;
status = YES;
}
// tempView1.backgroundColor = [UIColor orangeColor];
}
if (status) {
CGRect containerFrame = CGRectMake(0, 0, self.view.frame.size.width, tempView.frame.size.height+increament);
tempView.frame = containerFrame;
tempScroll.contentSize = CGSizeMake(tempView.frame.size.width, tempView.frame.size.height);
}
}
This method is for reference just, because here scenario is little bit different.
My code is in objective and is for reference only convert in swift required!!
This was how you manage it!!
Suggestion : it is better to use UITableView in your case!!!
Hope this will help :)
i really how to do a thing wich is probably easy..
I've a ScrollView with some button in it.
That's how i create all my button in the scrollview.
var buttonList = [UIButton]()
func createButton() {
let imageArray = fillImageArray()
var lastButtonWidth: CGFloat = 0
for index in 0..<6 {
let frame1 = CGRect(x: ((self.view.frame.size.width / 2) - 27.5) + CGFloat(index * 70), y: 0, width: 55, height: 55 )
let button = UIButton(frame: frame1)
button.setImage(imageArray[index], forState: .Normal)
button.tag = index
button.addTarget(parentViewController, action: #selector(ViewController.buttonClicked(_:)), forControlEvents: .TouchUpInside)
self.scrollView.addSubview(button)
lastButtonWidth = frame1.origin.x
buttonList.append(button)
}
self.scrollView.contentSize = CGSizeMake(lastButtonWidth + 55, 0)
}
I want when i press one of my button to center him and positioning correctly the other buttons.
example :
If i press on 5 i want this result :
the button 5 is moved to the center.
Now what I would suggest using is the scroll view method scrollView.scrollRectToVisible(CGRect, animated: Bool). This will move the scroll view to make a certain part of your content visible.
To create the CGRect you could do something like this:
let scrollWidth = scrollView.frame.width
let scrollHeight = scrollView.frame.height
let desiredXCoor = button.frame.origin.x - ((scrollWidth / 2) - (button.frame.width / 2) )
let rect = CGRect(x: desiredXCoor, y: 0, width: scrollWidth, height: scrollHeight)
scrollView.scrollRectToVisible(rect, animated: true)
My math may be a bit off, but the essence is that you use the size of the scrollView and the UIButton to create a CGRect for the scroll view to move to. This means when a button is clicked, you could use an implementation like this:
func myMethod() {
button.addTarget(self, action: "buttonClicked:", forControlEvents: UIControlEvents.TouchUpInside)
}
func buttonClicked(sender: UIButton){
let scrollWidth = scrollView.frame.width
let scrollHeight = scrollView.frame.height
let desiredXCoor = sender.frame.origin.x - ((scrollWidth / 2) - (sender.frame.width / 2) )
let rect = CGRect(x: desiredXCoor, y: 0, width: scrollWidth, height: scrollHeight)
scrollView.scrollRectToVisible(rect, animated: true)
}
If adjusted properly to your project, this should allow you to do what you have outlined.
Hope this would help you.
In button action method write below code.
func buttonClicked(sender:UIButton) {
for view in self.scrollView.subviews {
if view.isKindOfClass(UIButton) && view.tag == sender.tag {
let xCenter = max(0, (view.center.x - self.scrollView.frame.width/2))
self.scrollView.setContentOffset(CGPointMake(xCenter, self.scrollView.contentOffset.y), animated: true)
break;
}
}
}
I suppose you want the button touched to be placed in the center,so there is a easy solution, you can use the button's center.x - scrollview.width / 2 as the offsetX to construct the contentOffset and take two boundary situation into consideration:offsetx < 0 and offsetx + scrollview.width > scroll.contentSize.width
Ok i just found by myself.
let centerScrollView = scrollView.frame.size.height * 2
UIView.animateWithDuration(0.2, delay: 0, options: UIViewAnimationOptions.CurveLinear, animations: {
self.scrollView.contentOffset = CGPoint(x: sender.frame.origin.x - centerScrollView, y: sender.frame.origin.y)
}, completion: nil)
and it's perfectly center. Thx everyone.
I don't want to use a subview if I can avoid it. I want a UIButton with a background image, text, and an image in it. Right now, when I do that, the image is on the left side of the text. The background image, text, and image all have different highlight states.
Simplest solution:
iOS 10 & up, Swift:
button.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
button.titleLabel?.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
button.imageView?.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
Before iOS 10, Swift/Obj-C:
button.transform = CGAffineTransformMakeScale(-1.0, 1.0);
button.titleLabel.transform = CGAffineTransformMakeScale(-1.0, 1.0);
button.imageView.transform = CGAffineTransformMakeScale(-1.0, 1.0);
iOS 9 & up, Swift: (Recommended)
button.semanticContentAttribute = .forceRightToLeft
Despite some of the suggested answers being very creative and extremely clever, the simplest solution is as follows:
button.semanticContentAttribute = UIApplication.shared
.userInterfaceLayoutDirection == .rightToLeft ? .forceLeftToRight : .forceRightToLeft
As simple as that. As a bonus, the image will be at the left side in right-to-left locales.
EDIT: as the question has been asked a few times, this is iOS 9 +.
UPDATED FOR XCODE 9 (Via Interface Builder)
There's an easier way from the Interface Builder.
Select the UIButton and select this option in the View Utilities > Semantic:
That's it! Nice and simple!
OPTIONAL - 2nd step:
If you want to adjust the spacing between the image and the title you can change the Image Inset here:
Subclassing UIButton is completely unnecessary. Instead you can simply set a high left inset value for the image insets, and a small right inset for the title. Something like this:
button.imageEdgeInsets = UIEdgeInsetsMake(0., button.frame.size.width - (image.size.width + 15.), 0., 0.);
button.titleEdgeInsets = UIEdgeInsetsMake(0., 0., 0., image.size.width);
I'm giving Inspire48 the credit for this one. Based on his suggestion and looking at that other question I came up with this. Subclass UIButton and override these methods.
#implementation UIButtonSubclass
- (CGRect)imageRectForContentRect:(CGRect)contentRect
{
CGRect frame = [super imageRectForContentRect:contentRect];
frame.origin.x = CGRectGetMaxX(contentRect) - CGRectGetWidth(frame) - self.imageEdgeInsets.right + self.imageEdgeInsets.left;
return frame;
}
- (CGRect)titleRectForContentRect:(CGRect)contentRect
{
CGRect frame = [super titleRectForContentRect:contentRect];
frame.origin.x = CGRectGetMinX(frame) - CGRectGetWidth([self imageRectForContentRect:contentRect]);
return frame;
}
#end
Just update the insets when the title is changed. You need to compensate for the inset with an equal and opposite inset on the other side.
[thebutton setTitle:title forState:UIControlStateNormal];
thebutton.titleEdgeInsets = UIEdgeInsetsMake(0, -thebutton.imageView.frame.size.width, 0, thebutton.imageView.frame.size.width);
thebutton.imageEdgeInsets = UIEdgeInsetsMake(0, thebutton.titleLabel.frame.size.width, 0, -thebutton.titleLabel.frame.size.width);
All of these answers, as of January 2016, are unnecessary. In Interface Builder, set the View Semantic to Force Right-to-Left, or if you prefer programmatic way, semanticContentAttribute = .forceRightToLeft That will cause the image to appear on the right of your text.
In interface builder you can configure options Edge Insets for UIButton, separately each of three parts: content, image, title
Xcode 8:
I decided not to use the standard button image view because the proposed solutions to move it around felt hacky. This got me the desired aesthetic, and it is intuitive to reposition the button by changing the constraints:
extension UIButton {
func addRightIcon(image: UIImage) {
let imageView = UIImageView(image: image)
imageView.translatesAutoresizingMaskIntoConstraints = false
addSubview(imageView)
let length = CGFloat(15)
titleEdgeInsets.right += length
NSLayoutConstraint.activate([
imageView.leadingAnchor.constraint(equalTo: self.titleLabel!.trailingAnchor, constant: 10),
imageView.centerYAnchor.constraint(equalTo: self.titleLabel!.centerYAnchor, constant: 0),
imageView.widthAnchor.constraint(equalToConstant: length),
imageView.heightAnchor.constraint(equalToConstant: length)
])
}
}
Update: Swift 3
class ButtonIconRight: UIButton {
override func imageRect(forContentRect contentRect:CGRect) -> CGRect {
var imageFrame = super.imageRect(forContentRect: contentRect)
imageFrame.origin.x = super.titleRect(forContentRect: contentRect).maxX - imageFrame.width
return imageFrame
}
override func titleRect(forContentRect contentRect:CGRect) -> CGRect {
var titleFrame = super.titleRect(forContentRect: contentRect)
if (self.currentImage != nil) {
titleFrame.origin.x = super.imageRect(forContentRect: contentRect).minX
}
return titleFrame
}
}
Original answer for Swift 2:
A solution that handles all horizontal alignments, with a Swift implementation example. Just translate to Objective-C if needed.
class ButtonIconRight: UIButton {
override func imageRectForContentRect(contentRect:CGRect) -> CGRect {
var imageFrame = super.imageRectForContentRect(contentRect)
imageFrame.origin.x = CGRectGetMaxX(super.titleRectForContentRect(contentRect)) - CGRectGetWidth(imageFrame)
return imageFrame
}
override func titleRectForContentRect(contentRect:CGRect) -> CGRect {
var titleFrame = super.titleRectForContentRect(contentRect)
if (self.currentImage != nil) {
titleFrame.origin.x = CGRectGetMinX(super.imageRectForContentRect(contentRect))
}
return titleFrame
}
}
Also worth noting that it handles quite well image & title insets.
Inspired from jasongregori answer ;)
If this need to be done in UIBarButtonItem, additional wrapping in view should be used
This will work
let view = UIView()
let button = UIButton()
button.setTitle("Skip", for: .normal)
button.setImage(#imageLiteral(resourceName:"forward_button"), for: .normal)
button.semanticContentAttribute = .forceRightToLeft
button.sizeToFit()
view.addSubview(button)
view.frame = button.bounds
navigationItem.rightBarButtonItem = UIBarButtonItem(customView: view)
This won't work
let button = UIButton()
button.setTitle("Skip", for: .normal)
button.setImage(#imageLiteral(resourceName:"forward_button"), for: .normal)
button.semanticContentAttribute = .forceRightToLeft
button.sizeToFit()
navigationItem.rightBarButtonItem = UIBarButtonItem(customView: button)
Do Yourself. Xcode10, swift4,
For programmatically UI design
lazy var buttonFilter : ButtonRightImageLeftTitle = {
var button = ButtonRightImageLeftTitle()
button.setTitle("Playfir", for: UIControl.State.normal)
button.setImage(UIImage(named: "filter"), for: UIControl.State.normal)
button.backgroundColor = UIColor.red
button.contentHorizontalAlignment = .left
button.titleLabel?.font = UIFont.systemFont(ofSize: 16)
return button
}()
Edge inset values are applied to a rectangle to shrink or expand the
area represented by that rectangle. Typically, edge insets are used
during view layout to modify the view’s frame. Positive values cause
the frame to be inset (or shrunk) by the specified amount. Negative
values cause the frame to be outset (or expanded) by the specified
amount.
class ButtonRightImageLeftTitle: UIButton {
override func layoutSubviews() {
super.layoutSubviews()
guard imageView != nil else { return }
imageEdgeInsets = UIEdgeInsets(top: 5, left: (bounds.width - 35), bottom: 5, right: 5)
titleEdgeInsets = UIEdgeInsets(top: 0, left: -((imageView?.bounds.width)! + 10), bottom: 0, right: 0 )
}
}
for StoryBoard UI design
iOS 15 brought an update where you can now handle image placements in buttons in a simpler non messier way, ie. without insets.
In XIB/Storyboards:
Simply set the button 'placement' property to leading/training/top/bottom after adding an image property to button. Since it's leading/training, there is an added advantage of it supporting RTL
**In code (Programmatically): **
Use Button Configuration property programmatically
This is not a backward compatible feature, and will work only in iOS15+ as was demonstrated in WWDC '21 - https://developer.apple.com/videos/play/wwdc2021/10064/?time=236
Developer documentation: https://developer.apple.com/documentation/uikit/uibutton/configuration?changes=_4
Here is solution for UIButton with center aligned content.
This code make image right aligned and allows to use imageEdgeInsets and titleEdgeInsets for precious positioning.
Subclass UIButton with your custom class and add:
- (CGRect)imageRectForContentRect:(CGRect)contentRect {
CGRect frame = [super imageRectForContentRect:contentRect];
CGFloat imageWidth = frame.size.width;
CGRect titleRect = CGRectZero;
titleRect.size = [[self titleForState:self.state] sizeWithAttributes:#{NSFontAttributeName: self.titleLabel.font}];
titleRect.origin.x = (self.frame.size.width - (titleRect.size.width + imageWidth)) / 2.0 + self.titleEdgeInsets.left - self.titleEdgeInsets.right;
frame.origin.x = titleRect.origin.x + titleRect.size.width - self.imageEdgeInsets.right + self.imageEdgeInsets.left;
return frame;
}
- (CGRect)titleRectForContentRect:(CGRect)contentRect {
CGFloat imageWidth = [self imageForState:self.state].size.width;
CGRect frame = [super titleRectForContentRect:contentRect];
frame.origin.x = (self.frame.size.width - (frame.size.width + imageWidth)) / 2.0 + self.titleEdgeInsets.left - self.titleEdgeInsets.right;
return frame;
}
Extension Way
Using extension to set image on the right side with custom offset
extension UIButton {
func addRightImage(image: UIImage, offset: CGFloat) {
self.setImage(image, for: .normal)
self.imageView?.translatesAutoresizingMaskIntoConstraints = false
self.imageView?.centerYAnchor.constraint(equalTo: self.centerYAnchor, constant: 0.0).isActive = true
self.imageView?.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -offset).isActive = true
}
}
Being that the transform solution doesn't work in iOS 11 I decided to write a new approach.
Adjusting the buttons semanticContentAttribute gives us the image nicely to the right without having to relayout if the text changes. Because of this it's the ideal solution. However I still need RTL support. The fact that an app can not change it's layout direction in the same session resolves this issue easily.
With that said, it's pretty straight forward.
extension UIButton {
func alignImageRight() {
if UIApplication.shared.userInterfaceLayoutDirection == .leftToRight {
semanticContentAttribute = .forceRightToLeft
}
else {
semanticContentAttribute = .forceLeftToRight
}
}
}
Swift -Extend the UiButton and put these lines
if let imageWidth = self.imageView?.frame.width {
self.titleEdgeInsets = UIEdgeInsetsMake(0, -imageWidth, 0, imageWidth);
}
if let titleWidth = self.titleLabel?.frame.width {
let spacing = titleWidth + 20
self.imageEdgeInsets = UIEdgeInsetsMake(0, spacing, 0, -spacing);
}
Building on Piotr Tomasik's elegant solution: if you want to have a bit of spacing between the button label and image as well, then include that in your edge insets as follows (copying my code here that works perfectly for me):
CGFloat spacing = 3;
CGFloat insetAmount = 0.5 * spacing;
// First set overall size of the button:
button.contentEdgeInsets = UIEdgeInsetsMake(0, insetAmount, 0, insetAmount);
[button sizeToFit];
// Then adjust title and image insets so image is flipped to the right and there is spacing between title and image:
button.titleEdgeInsets = UIEdgeInsetsMake(0, -button.imageView.frame.size.width - insetAmount, 0, button.imageView.frame.size.width + insetAmount);
button.imageEdgeInsets = UIEdgeInsetsMake(0, button.titleLabel.frame.size.width + insetAmount, 0, -button.titleLabel.frame.size.width - insetAmount);
Thanks Piotr for your solution!
Erik
Took #Piotr's answer and made it into a Swift extension. Make sure to set the image and title before calling this, so that the button sizes properly.
extension UIButton {
/// Makes the ``imageView`` appear just to the right of the ``titleLabel``.
func alignImageRight() {
if let titleLabel = self.titleLabel, imageView = self.imageView {
// Force the label and image to resize.
titleLabel.sizeToFit()
imageView.sizeToFit()
imageView.contentMode = .ScaleAspectFit
// Set the insets so that the title appears to the left and the image appears to the right.
// Make the image appear slightly off the top/bottom edges of the button.
self.titleEdgeInsets = UIEdgeInsets(top: 0, left: -1 * imageView.frame.size.width,
bottom: 0, right: imageView.frame.size.width)
self.imageEdgeInsets = UIEdgeInsets(top: 4, left: titleLabel.frame.size.width,
bottom: 4, right: -1 * titleLabel.frame.size.width)
}
}
}
With Xcode 13.3 I solved in the following few steps and as well adding padding to the image.
After creating the button then do this as listed below:
First define the image:
let symbol = UIImage(named: "put name of your symbol here")
Then in viewDidLoad where you created the button, initialise the above defined image in 1, to add the image to the button & set the properties:
button.setImage(symbol, for: .normal)
button.semanticContentAttribute = .forceRightToLeft
button.configuration?.imagePadding = 2
And don't forget to add your button to the view.
Subclassing and over-riding layoutSubviews is probably your best way to go.
Referenced from: iPhone UIButton - image position
A swift option that does what you want without playing with any insets:
class RightImageButton: UIButton {
override func layoutSubviews() {
super.layoutSubviews()
if let textSize = titleLabel?.intrinsicContentSize(),
imageSize = imageView?.intrinsicContentSize() {
let wholeWidth = textSize.width + K.textImageGap + imageSize.width
titleLabel?.frame = CGRect(
x: round(bounds.width/2 - wholeWidth/2),
y: 0,
width: ceil(textSize.width),
height: bounds.height)
imageView?.frame = CGRect(
x: round(bounds.width/2 + wholeWidth/2 - imageSize.width),
y: RoundRetina(bounds.height/2 - imageSize.height/2),
width: imageSize.width,
height: imageSize.height)
}
}
struct K {
static let textImageGap: CGFloat = 5
}
}
Solutions mentioned here stopped working, once I enabled Auto Layout. I had to come up with my own:
Subclass UIButton and override layoutSubviews method:
//
// MIThemeButtonImageAtRight.m
// Created by Lukasz Margielewski on 7/9/13.
//
#import "MIThemeButtonImageAtRight.h"
static CGRect CGRectByApplyingUIEdgeInsets(CGRect frame, UIEdgeInsets insets);
#implementation MIThemeButtonImageAtRight
- (void)layoutSubviews
{
[super layoutSubviews];
CGRect contentFrame = CGRectByApplyingUIEdgeInsets(self.bounds, self.contentEdgeInsets);
CGRect frameIcon = self.imageView.frame;
CGRect frameText = self.titleLabel.frame;
frameText.origin.x = CGRectGetMinX(contentFrame) + self.titleEdgeInsets.left;
frameIcon.origin.x = CGRectGetMaxX(contentFrame) - CGRectGetWidth(frameIcon);
self.imageView.frame = frameIcon;
self.titleLabel.frame = frameText;
}
#end
static CGRect CGRectByApplyingUIEdgeInsets(CGRect frame, UIEdgeInsets insets){
CGRect f = frame;
f.origin.x += insets.left;
f.size.width -= (insets.left + insets.right);
f.origin.y += (insets.top);
f.size.height -= (insets.top + insets.bottom);
return f;
}
Result:
swift 3.0 Migration
solution given by jasongregori
class ButtonIconRight: UIButton {
override func imageRect(forContentRect contentRect: CGRect) -> CGRect {
var imageFrame = super.imageRect(forContentRect: contentRect)
imageFrame.origin.x = super.titleRect(forContentRect: contentRect).maxX - imageFrame.width
return imageFrame
}
override func titleRect(forContentRect contentRect: CGRect) -> CGRect {
var titleFrame = super.titleRect(forContentRect: contentRect)
if (self.currentImage != nil) {
titleFrame.origin.x = super.imageRect(forContentRect: contentRect).minX
}
return titleFrame
}
Xcode 11.4 Swift 5.2
For anyone trying to mirror the Back button style with the chevron like this:
import UIKit
class NextBarButton: UIBarButtonItem {
convenience init(target: Any, selector: Selector) {
// Create UIButton
let button = UIButton(frame: .zero)
// Set Title
button.setTitle("Next", for: .normal)
button.setTitleColor(.systemBlue, for: .normal)
button.titleLabel?.font = UIFont.systemFont(ofSize: 17)
// Configure Symbol
let config = UIImage.SymbolConfiguration(pointSize: 19.0, weight: .semibold, scale: .large)
let image = UIImage(systemName: "chevron.right", withConfiguration: config)
button.setImage(image, for: .normal)
// Add Target
button.addTarget(target, action: selector, for: .touchUpInside)
// Put the Image on the right hand side of the button
// Credit to liau-jian-jie for this part
button.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
button.titleLabel?.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
button.imageView?.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
// Customise spacing to match system Back button
button.imageEdgeInsets = UIEdgeInsets(top: 0.0, left: -18.0, bottom: 0.0, right: 0.0)
button.titleEdgeInsets = UIEdgeInsets(top: 0.0, left: -12.0, bottom: 0.0, right: 0.0)
self.init(customView: button)
}
}
Implementation:
override func viewDidLoad() {
super.viewDidLoad()
let nextButton = NextBarButton(target: self, selector: #selector(nextTapped))
navigationItem.rightBarButtonItem = nextButton
}
#objc func nextTapped() {
// your code
}
Swift 3:
open override func imageRect(forContentRect contentRect: CGRect) -> CGRect {
var frame = super.imageRect(forContentRect: contentRect)
let imageWidth = frame.size.width
var titleRect = CGRect.zero
titleRect.size = self.title(for: self.state)!.size(attributes: [NSFontAttributeName: self.titleLabel!.font])
titleRect.origin.x = (self.frame.size.width - (titleRect.size.width + imageWidth)) / 2.0 + self.titleEdgeInsets.left - self.titleEdgeInsets.right;
frame.origin.x = titleRect.origin.x + titleRect.size.width - self.imageEdgeInsets.right + self.imageEdgeInsets.left;
return frame
}
open override func titleRect(forContentRect contentRect: CGRect) -> CGRect {
var frame = super.titleRect(forContentRect: contentRect)
if let imageWidth = self.image(for: self.state)?.size.width {
frame.origin.x = (self.frame.size.width - (frame.size.width + imageWidth)) / 2.0 + self.titleEdgeInsets.left - self.titleEdgeInsets.right;
}
return frame
}
How about Constraints? Unlike semanticContentAttribute, they don't change semantics. Something like this perhaps:
button.rightAnchorconstraint(equalTo: button.rightAnchor).isActive = true
or in Objective-C:
[button.imageView.rightAnchor constraintEqualToAnchor:button.rightAnchor].isActive = YES;
Caveats: Untested, iOS 9+
After trying multiple solutions from around the internet, I was not achieving the exact requirement. So I ended up writing custom utility code. Posting to help someone in future.
Tested on swift 4.2
// This function should be called in/after viewDidAppear to let view render
func addArrowImageToButton(button: UIButton, arrowImage:UIImage = #imageLiteral(resourceName: "my_image_name") ) {
let btnSize:CGFloat = 32
let imageView = UIImageView(image: arrowImage)
let btnFrame = button.frame
imageView.frame = CGRect(x: btnFrame.width-btnSize-8, y: btnFrame.height/2 - btnSize/2, width: btnSize, height: btnSize)
button.addSubview(imageView)
//Imageview on Top of View
button.bringSubviewToFront(imageView)
}
for this issue you can create UIView inside "label with UIImage view" and set UIView class as a UIControl and create IBAction as tuch up in side
Swift 4 & 5
Change the direction of UIButton image (RTL and LTR)
extension UIButton {
func changeDirection(){
isArabic ? (self.contentHorizontalAlignment = .right) : (self.contentHorizontalAlignment = .left)
// left-right margin
self.imageEdgeInsets = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)
self.titleEdgeInsets = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)
}
}