I am developing a simple iPhone app in Swift
I have a customUITableViewCell. In the cell I have a normal UIButton with text of "Hello World".
In my code for the custom cell, I have the following function:
#IBAction func buttonAction(sender: AnyObject) {
if likeButton.titleLabel?.text == "Hello World" {
likeButton.titleLabel?.text = "Hi!"
}
}
When I tap theUIButton, the text of theUIButton changes to "Hi!" for just a split second! And then it quickly changes back to "Hello World"...is there any way to fix that?
Why is it doing that?
Use UIButtons's setTitle: forState: rather than setting text on titleLabel of button. For Instance-
Initial set up
likeButton.setTitle("Hello World", forState: UIControlState.Normal)
On click set up-
#IBAction func buttonAction(sender: AnyObject) {
if likeButton.titleLabel?.text == "Hello World" {
likeButton.setTitle("Hi!", forState: UIControlState.Normal)
}
}
likeButton.setTitle("my text here", forState: UIControlState.Normal)
Use this code
Do Something like this :
#IBAction func buttonAction(sender: AnyObject) {
likeButton.setTitle("Hi!", forState: UIControlState.Normal)
}
it works here, hope also work there, set your default value-
yourButton.setTitle("Hello", forState: UIControlState.Normal)
when you tapped your button set this
#IBAction func buttonAction(sender: AnyObject) {
if yourButton.titleLabel?.text == "Hello " {
yourButton.setTitle("Max", forState: UIControlState.Normal)
}
}
Related
My UIButton is in a UICollectionviewcell, which is in a UICollectionview, which is in a UITableViewCell, which is in a UITableView.
The button is a like button, I want it to change its text when clicked. But after changing the text, it returns the original value. What might be the reason here?
Here is what it looks like:
https://gfycat.com/UnlawfulGroundedErin
This is the onClickEvent of button:
#IBAction func actionClick(sender: MyActionButton) {
if (sender.toggle){
print("Do dislike call here.")
sender.toggle = false
sender.titleLabel?.text = "Like"
}else{
print("Do like call here.")
sender.toggle = true
sender.titleLabel?.text = "Unlike"
}
}
Try This. It will work properly
#IBAction func actionClick(sender: MyActionButton) {
if (sender.toggle){
print("Do dislike call here.")
sender.toggle = false
sender.titleLabel?.text = "Like"
sender.setTitle("Like", forState: UIControlState.Normal)
}else{
print("Do like call here.")
sender.toggle = true
sender.setTitle("Unlike", forState: UIControlState.Normal)
}
}
UIButton have different texts for its title in different states.
Just for your knowledge
In viewDidLoad:
btnObject.setTitle("Like", forState: UIControlState.Normal)
btnObject.setTitle("Unlike", forState: UIControlState.Selected)
then in method actionClick: if you write only one statement,
sender.selected = !sender.selected;
it will work.
try this
#IBAction func actionClick(sender: UIButton) {
if sender.isSelected() {
sender.selected = false
sender.setTitle("Like", forState: UIControlState.Normal)
}
else {
sender.selected = true
sender.setTitle("Unlike", forState: UIControlState.Normal)
}
}
Choice-2
var isSelectFirst:Bool = false
#IBAction func actionClick(sender: UIButton) {
if isHighLighted == false{
sender.setTitle("Unlike", forState: UIControlState.Normal)
isHighLighted = true
}else{
sender.setTitle("Like", forState: UIControlState.Normal)
isHighLighted = false
}
}
Part way done with learning swift but I hit a small wall and yet again, I'm sure I'm just a bit new at this and an easy solution is there but I'm having trouble figuring out how to select/deselect buttons below is what I have so far and it is a button turns into a checkmark when clicked on... I've gotten that far but I need that button to deselect when clicked on again and then obviously be able to be clicked again if need be.
#IBAction func buttonPressed(sender: AnyObject) {
sender.setImage(UIImage(named: "Checkmark.png"), forState: .Normal)
}
Swift 3 note: .selected and .checked are now lower case UIControlState values in the SDK, and some of the methods have been renamed:
let button = UIButton()
button.setImage(UIImage(named: "Unchecked"), for: .normal)
button.setImage(UIImage(named: "Checked"), for: .selected)
You can also now use image literals with Xcode 8 instead of UIImage(named:):
#imageLiteral(resourceName: "Unchecked")
Swift 2:
Why not use the .Selected state of the button as the "checked" state, and the .Normal state as the "unchecked" state.
let button = UIButton()
button.setImage(UIImage(named: "Unchecked"), forState: .Normal)
button.setImage(UIImage(named: "Checked"), forState: .Selected)
// ...
#IBAction func buttonPressed(sender: AnyObject) {
if let button = sender as? UIButton {
if button.selected {
// set deselected
button.selected = false
} else {
// set selected
button.selected = true
}
}
}
You dont need to set selected in condition. I just doing with following method in swift:
func selectDeselect(sender: UIButton){
sender.selected = !sender.selected
if(sender.selected == true)
{
sender.setImage(UIImage(named:"select_heart"), forState: UIControlState.Normal)
}
else
{
sender.setImage(UIImage(named:"heart"), forState: UIControlState.Normal)
}
}
Here is Working code for swift 4.
Make Sure you need to connect Button IBAction Outlet as UIButton and set default button image from storyboard whatever you want.
#IBAction func btnTapped(_ sender: UIButton) {
if sender.currentImage == UIImage(named: "radio_unchecked"){
sender.setImage(UIImage(named: "radio_checked"), for: .normal)
}else{
sender.setImage(UIImage(named: "radio_unchecked"), for: .normal)
}
}
update for Swift 4+ :
let button = UIButton()
button.setImage(UIImage(named: "Unchecked"), forState: .Normal)
button.setImage(UIImage(named: "Checked"), forState: .Selected)
#IBAction func buttonPressed(sender: AnyObject) {
if let button = sender {
if button.isSelected {
// set deselected
button.isSelected = false
} else {
// set selected
button.isSelected = true
}
}
}
Set uncheck image on default state from storyboard and check image on selected state from storyboard.
#IBAction func buttonPressed(sender: AnyObject) {
buttonOutlet.isSelected = !buttonOutlet.isSelected
}
private(set) lazy var myButton: UIButton = {
let button = UIButton()
button.setImage(UIImage(named: "Unchecked"), for: .normal)
button.setImage(UIImage(named: "Checked"), for: .selected)
button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
#objc
func buttonTapped(sender: AnyObject) {
sender.isSelected.toggle()
}
To select only the pressed button out of three buttons and deselect the others when designated button is pressed.
#IBAction func buttonPressed(_ sender: UIButton) {
// Deselect all buttons
button1.isSelected = false
button2.isSelected = false
button3.isSelected = false
// Select the pressed button
sender.isSelected = true
}
When user taps "download" button i need to change the title of a button to
"loading..." but the number of dots must dynamically change from 1 to 3. How can i make it for certain amount of time(5-10 sec) ? Or do i just need to setTitle multiple times ?
button.setTitle("loading.", forState: .Normal)
You need to use
button.setTitle("loading.", forState: .Normal)
button.setTitle("loading..", forState: .Normal)
button.setTitle("loading...", forState: .Normal)
whenever you want to change the number of dots.
Call one of the above after a delay or whenever you need to update the button.
EDIT: To prevent your button's title from blinking (as pointed out by teamnorge) use:
UIView.performWithoutAnimation {
button.setTitle("loading...", forState: .Normal)
}
#IBAction func renameClassButton(sender: AnyObject) {
classTopButton.text = "\(classTopTextField)"
}
You can d it this way:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var loading: UIButton!
//Create an array for your button name
let buttonNameArray = ["loading.","loading..","loading..."]
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func loadingButton(sender: AnyObject) {
//Set delay time for changing name
var delayTime = 1.0
for name in buttonNameArray {
self.delay(delayTime++){
self.loading.setTitle(name, forState: .Normal)
}
}
}
//Function for delay
func delay(delay:Double, closure:()->()) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW,Int64(delay * Double(NSEC_PER_SEC))),dispatch_get_main_queue(), closure)
}
}
And your result will be:
Hope this will help.
button.setTitle("my text here", forState: .Normal)
So I have this very simple code, the button is set to the title "Title1" in IB
#IBAction func changeTitle(sender: AnyObject) {
let button = sender as UIButton
if (button.titleLabel == "Title1") {
button.setTitle("Title2", forState: .Normal)
} else {
button.setTitle("Title1", forState: .Normal)
}
}
So what's happening is that the first condition in the if statement gets executed, then the line of code updating the title of the button is hit, where then it goes back to the if statement, then finding it false, and skipping to the else {} now... I cannot figure out why this is happening.
Thanks in advance
This should work:
#IBAction func changeTitle(sender: AnyObject) {
let button = sender as UIButton
if (button.titleLabel?.text == "Title1") {
button.setTitle("Title2", forState: .Normal)
} else {
button.setTitle("Title1", forState: .Normal)
}
}
I have button and method
switchViewButton = UIButton.buttonWithType(.System) as? UIButton
switchViewButton!.frame = CGRectMake(15, 25, 50, 50)
switchViewButton!.setTitle("sss", forState: .Normal)
switchViewButton!.addTarget(self, action: "switchViewFunc", forControlEvents: .TouchUpInside)
switchViewButton!.backgroundColor = UIColor.redColor()
switchViewButton!.layer.cornerRadius = 25
topView.addSubview(switchViewButton)
#IBAction func switchViewFunc(sender : AnyObject){
println("Button was clicked", sender)}
This method crashes app with reason "unrecognized selector sent to instance"
I have another button and method just like this, and it's work perfect. If I'm delete (sender : AnyObject) it works. I cann't understand what is wrong
Add action this way (pay attention to ":"
switchViewButton!.addTarget(self, action: "switchViewFunc:", forControlEvents: .TouchUpInside)
#IBAction func switchViewFunc(sender : AnyObject){
println("Button was clicked", sender)} - ?????
Try this:
func switchViewFunc(sender : UIButton!){
println("Button was clicked", sender)
}
#IBAction and an argument are not needed.
func switchViewFunc(){
println("Button was clicked", sender)
}