how to bind the string vlaues from array to uibutton ( static ) - ios

From the response i will get the array like :
data = ["1","2","3"]
Button1 // all uibutton iboutlet
Button2 // all uibutton iboutlet
Button3 // all uibutton iboutlet
Now how i will bind the data value to all the 3 button. So that in screen it have to display like ;
1
2
3
Note : All buttons are static, and only 3 data will get from response.
Thanks in advance !!

zip([Button1, Button2, Button3], data).forEach { (button, title) in
button.setTitle(title, for: .normal)
}
zip joins two arrays together in parallel, so the zip of data and [Button1, Button2, Button3] will be an array of tuples, like so:
[(Button1, "1"), (Button2, "2"), (Button3, "3")]
Then simply iterate the array of tuples, setting each button's title attribute to its corresponding title value.
If data were to have more than 3 elements, the forEach would still only iterate 3 times.

Hope I have correctly understood, what do you want to do.
Try to make it like this:
Button1.setTitle(data[0], for: .normal)
Button2.setTitle(data[1], for: .normal)
Button3.setTitle(data[2], for: .normal)
Hope it helps

As vlad said:
Button1.setTitle(data[0], for: .normal)
Button2.setTitle(data[1], for: .normal)
Button3.setTitle(data[2], for: .normal) //Notice !setTitle!
I also recommend to have a look at https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/CollectionTypes.html

Make array of your Button and title
let button = [button1,button2,button3]
let title = ["1","2","3"]
for (button,title) in zip(button,title){
button.setTitle(title, for: .normal)
}

Related

Can't change UIbutton image for different state

I want to change the image of a UIButton for different states. To achieve this, I'm using:
btn.setImage(UIImage(named: "blabla"), for .normal)
and
btn.setImage(UIImage(named: blabla2), for .disabled)
This only makes some appear dimmed.
What did I do wrong? I just want to make my button appearance the same for different states, how?
(my button type - .system).
This helped me (swift 3.0)
btn.setImage(UIImage(named:"yourFriend")?.withRenderingMode(.alwaysOriginal), for: .normal)
btn.setImage(UIImage(named:"yourFriend")?.withRenderingMode(.alwaysOriginal), for: .disabled)
You just need to set one for the state. And if you don't set another image for different state. It would look the same in all state.
button.setImage(image, forState: .Normal)
How to change UIButton image in Swift
For display disabled button set image
let btn = UIButton(type: .Custom)
btn.setImage(UIImage(named: blabla2), for .disabled)
Then
btn.enabled = false // to display Disable image
btn.enabled = true // to display Normal image
private let button1: UIButton = {
let button = UIButton(type: .custom)
button.setImage(UIImage(named:"firstButtonNormalStateImage"), for: .normal)
button.setImagesetImage(UIImage(named:"firstButtonSelectedStateImage"), for: .selected)
return button
}()
private let button2: UIButton = {
let button = UIButton(type: .custom)
button.setImage(UIImage(named:"secondButtonNormalStateImage"), for: .normal)
button.setImage(UIImage(named:"secondButtonSelectedStateImage"), for: .selected)
return button
}()
// implement for example in viewDidLoad()
button1.addTarget(self, action: #selector(firstButtonDidTap), for: .touchUpInside)
button2.addTarget(self, action: #selector(secondButtonDidTap), for: .touchUpInside)
// trigger actions
#objc func firstButtonDidTap() {
button1.isSelected = true
button2.isSelected = false
}
#objc func secondButtonDidTap() {
button2.isSelected = true
button1.isSelected = false
}
For whoever is still having this issue (currently Xcode 10.0) with a Custom button, I found I was able to change the text and/or image if instead of:
myButton.setTitle("Hi", for: [.normal])
I used this:
myButton.setTitle("Hi", for: []) //remove specific states
I don't know why .normal was not working for me, even though the button was definitely enabled. But maybe this will save someone else a headache!
You can simply do this by StoryBoard as well.
Select the button, got to identity inspector and do the following:-
Firstly set the buttonType to custom instead of system.
Secondly choose state Config to lets say default and give the imageName in "image" attribute, similarly choose other state configs (Highlighted, disabled, selected etc.) and set images as required by you.
Then later in the code you just have to control and set the state of the button, and respective image will be shown to you.

Swift: Remove a UIButton attributedTitle

If a UIButton has both a title and an attributedTitle set, the attributedTitle is the one that shows.
If I set a button to an attributed title:
myButton.setAttributedTitle(myAttribText, for: .normal)
and later in the app I want to set the button to a regular title:
myButton.setTitle(myRegularText, for: .normal)
Is there a line of code I can use to remove the attributedTitle on the button so that it will not override the new title I have set for the button? Thanks!
You need to set the AttributedTitle to nil before setting using setTitle for your button, Its working i have checked it.
like this
myButton.setAttributedTitle(nil, for: .normal)
myButton.setTitle(myRegularText, for: .normal)
If you use the underline attribute, you should to set the AttributedTitle by this method like this:
myButton.setAttributedTitle(NSAttributedString(string: myRegularText, attributes: nil), for: .normal)

Swift - Assign titles to multiple buttons

I have multiple buttons that all get their titles from an array. I would like to be able to assign the title with a loop, but I can't figure how to refer to each button as I go through the loop.
Currently I am adding each title with a line of code like this:
button0.setTitle(title[0], forState: .Normal)
button1.setTitle(title[1], forState: .Normal)
button2.setTitle(title[2], forState: .Normal)
button3.setTitle(title[3], forState: .Normal)
etc...
I have added an IBOutlet to each button, but I am also using tags for another purpose, so if there is a way to use tags to assign the titles, I would be happy to do that.
Any thoughts?
You need an IBOutletCollection
In your Swift ViewController, assign all your buttons to the below
#IBOutlet var buttons: [UIButton]!
Then to assign the titles
var buttonTitles = ["Button1","Button2"]
for (index,button) in buttons.enumerate()
{
if buttonTitles.count > index
{
if let title : String = buttonTitles[index]
{
button.setTitle(title, forState: .Normal)
}
}
}

How to change UIButton label programmatically

When I first run my app, I retrieve a number from my server and display it for my UIButton label. Think of this as a notification number displayed on a red UIButton.
When I remove a notification within the app, I want my UIButton label decrement by 1. I am able to get the decremented number from the server after I delete a notification, but I can't display this new number on the UIButton. The button always displays the number when the app is first fired.
I call makeButtonView() method after I remove a notification to update the UIButton
func makeButtonView(){
var button = makeButton()
view.addSubView(button)
button.tag = 2
if (view.viewWithTag(2) != nil) {
view.viewWithTag(2)?.removeFromSuperview()
var updatedButton = makeButton()
view.addSubview(updatedButton)
}else{
println("No button found with tag 2")
}
}
func makeButton() -> UIButton{
let button = UIButton(frame: CGRectMake(50, 5, 60, 40))
button.setBackgroundImage(UIImage(named: "redBubbleButton"), forState: .Normal)
API.getNotificationCount(userID) {
data, error in
button.setTitle("\(data)", forState: UIControlState.Normal)
}
button.addTarget(self, action: "targetController:", forControlEvents: UIControlEvents.TouchUpInside)
return button
}
Use this code for Swift 4 or 5
button.setTitle("Click Me", for: .normal)
I need more information to give you a proper code. But this approach should work:
lazy var button : UIButton = {
let button = UIButton(frame: CGRectMake(50, 5, 60, 40))
button.setBackgroundImage(UIImage(named: "redBubbleButton"), forState: .Normal)
button.addTarget(self, action: "targetController:", forControlEvents: UIControlEvents.TouchUpInside)
return button
}()
func makeButtonView(){
// This should be called just once!!
// Likely you should call this method from viewDidLoad()
self.view.addSubview(button)
}
func updateButton(){
API.getNotificationCount(userID) {
data, error in
// be sure this is call in the main thread!!
button.setTitle("\(data)", forState: UIControlState.Normal)
}
}
There have been some updates since Swift 4. This works for me:
self.button.setTitle("Button Title", for: UIControl.State.init(rawValue: 0))
Replace button with your IBOutlet name. You can also use a variable or array in place of the quoted text.
It's fairly simple ...
import UIKit
class ViewController: UIViewController {
#IBOutlet var button: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
button.setTitle("hello world", forState: UIControlState.Normal)
}
}
I believe if you set the state to normal, the value will propagate by default to other states so long as you haven't explicitly set a title for those states.
Said differently, if you set it for normal, it should also display this title when the button enters additional states
UIControlState.allZeros
UIControlState.Application
UIControlState.Disabled
UIControlState.Highlighted
UIControlState.Reserved
UIControlState.Selected
Lastly, here's Apple's documentation in case you have other questions.
Since your API call should be running on a background thread you need to dispatch your UI update back to the main thread like this:
DispatchQueue.main.async {
button.setTitle(“new value”, forState: .normal)
}
After setting the title, just a simple redraw of the button will do:
button.setNeedsDisplay();

Changing text of UIButton programmatically swift

Simple question here. I have a UIButton, currencySelector, and I want to programmatically change the text. Here's what I have:
currencySelector.text = "foobar"
Xcode gives me the error "Expected Declaration". What am I doing wrong, and how can I make the button's text change?
In Swift 3, 4, 5:
button.setTitle("Button Title", for: .normal)
Otherwise:
button.setTitle("Button Title", forState: UIControlState.Normal)
Also an #IBOutlet has to declared for the button.
Just a clarification for those new to Swift and iOS programming. Below line of code:
button.setTitle("myTitle", forState: UIControlState.Normal)
only applies to IBOutlets, not IBActions.
So, if your app is using a button as a function to execute some code, say playing music, and you want to change the title from Play to Pause based on a toggle variable, you need to also create an IBOutlet for that button.
If you try to use button.setTitle against an IBAction you will get an error. Its obvious once you know it, but for the noobs (we all were) this is a helpful tip.
Swift 5.0
// Standard State
myButton.setTitle("Title", for: .normal)
Swift 5:
let controlStates: Array<UIControl.State> = [.normal, .highlighted, .disabled, .selected, .focused, .application, .reserved]
for controlState in controlStates {
button.setTitle(NSLocalizedString("Title", comment: ""), for: controlState)
}
Swift 3:
Set button title:
//for normal state:
my_btn.setTitle("Button Title", for: .normal)
// For highlighted state:
my_btn.setTitle("Button Title2", for: .highlighted)
Changing title when attributed is a bit different :
I just ran into a problem : If you have an UIButton with an Attributed Title, you have to use :
my_btn.setAttributedTitle(NSAttributedString(string: my_title), for: my_state)
as, per Apple SetTitle Doc :
If you set both a title and an attributed title for the button, the button prefers the use of the attributed title over this one.
I had an attributed title and I tried to setTitle on it, with no effect...
Swift 3
When you make the #IBAction:
#IBAction func btnAction(_ sender: UIButton) {
sender.setTitle("string goes here", for: .normal)
}
This sets the sender as UIButton (instead of Any) so it targets the btnAction as a UIButton
As of 12/12/2021 - Swift version 5.5.1^ assuming you already have an IBOutlet linked to yourButton in a normal state.
yourButton.setTitle("Title of your button", for: .normal)
swift 4.2 and above
using button's IBOutlet
btnOutlet.setTitle("New Title", for: .normal)
using button's IBAction
#IBAction func btnAction(_ sender: UIButton) {
sender.setTitle("New Title", for: .normal)
}
Swift 3
let button: UIButton = UIButton()
button.frame = CGRect.init(x: view.frame.width/2, y: view.frame.height/2, width: 100, height: 100)
button.setTitle(“Title Button”, for: .normal)
To set a title for a button in Xcode using swift - 04:
first create a method called setTitle with parameter title and UIController state like below ;
func setTitle(_ title : String?, for state : UIControl.State) {
}
and recall this method in your button action method
like ;
yourButtonName.setTitle("String", for: .state)

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