So I have a storyboard with 3 buttons I want to just create 1 action for all those 3 buttons and decide what to do based on their label/id...
Is there a way to get some kind of identifier for each button?
By the way they are images, so they don't have a title.
@IBAction func mainButton(sender: UIButton) {
println(sender)
}
You can set a tag in the storyboard for each of the buttons. Then you can identify them this way:
@IBAction func mainButton(sender: UIButton) {
println(sender.tag)
}
EDIT: For more readability you can define an enum with values that correspond to the selected tag. So if you set tags like 0, 1, 2 for your buttons, above your class declaration you can do something like this:
enum SelectedButtonTag: Int {
case First
case Second
case Third
}
And then instead of handling hardcoded values you will have:
@IBAction func mainButton(sender: UIButton) {
switch sender.tag {
case SelectedButtonTag.First.rawValue:
println("do something when first button is tapped")
case SelectedButtonTag.Second.rawValue:
println("do something when second button is tapped")
case SelectedButtonTag.Third.rawValue:
println("do something when third button is tapped")
default:
println("default")
}
}
If you want to create 3 buttons with single method then you can do this by following code...Try this
Swift 3
Example :-
override func viewDidLoad()
{
super.viewDidLoad()
Button1.tag=1
Button1.addTarget(self,action:#selector(buttonClicked),
for:.touchUpInside)
Button2.tag=2
Button2.addTarget(self,action:#selector(buttonClicked),
for:.touchUpInside)
Button3.tag=3
Button3.addTarget(self,action:#selector(buttonClicked),
for:.touchUpInside)
}
func buttonClicked(sender:UIButton)
{
switch sender.tag
{
case 1: print("1") //when Button1 is clicked...
break
case 2: print("2") //when Button2 is clicked...
break
case 3: print("3") //when Button3 is clicked...
break
default: print("Other...")
}
}
You can create an outlet for your buttons and then implement:
@IBAction func mainButton(sender: UIButton) {
switch sender {
case yourbuttonname:
// do something
case anotherbuttonname:
// do something else
default: println(sender)
}
}
@IBAction func buttonPressed(_ sender: UIButton) {
if sender.tag == 1 {
print("Button 1 is pressed")
}
}
Assuming you gave them all proper names as @IBOutlets:
@IBOutlet var weak buttonOne: UIButton!
@IBOutlet var weak buttonTwo: UIButton!
@IBOutlet var weak buttonThree: UIButton!
You can use the following to determine which is which
@IBAction func didPressButton(sender: AnyObject){
// no harm in doing some sort of checking on the sender
if(sender.isKindOfClass(UIButton)){
switch(sender){
case buttonOne:
//buttonOne action
break
case buttonTwo:
//buttonTwo action
break
case buttonThree:
//buttonThree action
break
default:
break
}
}
Swift 3 Code: In xcode Please set tag for each button first to work following code.
@IBAction func threeButtonsAction(_ sender: UIButton) {
switch sender.tag {
case 1:
print("do something when first button is tapped")
break
case 2:
print("do something when second button is tapped")
break
case 3:
print("do something when third button is tapped")
break
default:
break
}
}
You can do like this, just you have to give tag to all the buttons and do like this:
@IBAction func mainButton(sender: AnyObject)
{
switch sender.tag {
case 1:
println("do something when first button is tapped")
case 2:
println("do something when second button is tapped")
case 3:
println("do something when third button is tapped")
default:
println("default")
}
}
Swift 4
add tag on button
let button = UIButton()
button.tag = 10
click event
@IBAction func mainButton(sender: UIButton) {
switch sender.tag {
case 10:
print("10")
case 11:
print("11")
default:
print("yes")
}
}
Use the outlets instead, tags clutter the code and make the readability way worse. Think about the poor developer that reads the code next and sees if sender.tag = 381 { // do some magic }, it just won't make any sense.
My example:
class PhoneNumberCell: UITableViewCell {
@IBOutlet weak var callButton: UIButton!
@IBOutlet weak var messageButton: UIButton!
@IBAction func didSelectAction(_ sender: UIButton) {
if sender == callButton {
debugPrint("Call person")
} else if sender == messageButton {
debugPrint("Message person")
}
}
[...]
}
You could also do this in a nice switch as well, which would make it even better.
Tested on Swift 5.1
In this case you can use NSObject extension Accessibility Element UIAccessibility.
I have used accessibilityLabel and accessibilityIdentifier both are success in call and condition checking.
First
You can set a Accessibility Label or Identifier in the storyboard for each of the buttons in Identity inspector. Accessibility should be enabled.
To check/Identify button by
@IBAction func selectionPicker(_ sender: UIButton){
if sender.accessibilityLabel == "childType"{ //Check by accessibilityLabel
print("Child Type")
}
if sender.accessibilityIdentifier == "roomType"{ //Check by accessibilityIdentifier
print("Room Type")
}
performSegue(withIdentifier: "selectionViewSegue", sender:sender)
}
On Swift 3.2 and 4.0 with Xcode 9.0
Given the case you labeled your buttons "1", "2", "3":
@IBAction func mainButton(sender: UIButton) {
switch sender.titleLabel?.text {
case "1":
print("do something when first button is tapped")
case "2":
print("do something when second button is tapped")
case "3":
print("do something when third button is tapped")
default:
() // empty statement or "do nothing"
}
}
Swift 5.5
I have utility methods in other classes that do not have an instance of my ViewController, so I don't compare the sent objects to what is defined in the ViewController's IBOutlets.
I don't use tags if I can use a plain language identifier on my UI objects. I'd rather have plain language identifiers than numbers to identify my objects because it is easier for me. Just another way of doing it.
If I need to use a utility method, I set it up with a sender parameter so I can send the button and then figure out which button was clicked based on the assigned identity of the button within Storyboard.
For example:
class Utility {
func doSomething(sender: Any?) {
guard let button = sender as? NSButton else {
print("Unable to set button from sender.")
return
}
guard case buttonID = button.identifier?.rawValue else {
print("Unable to get button identifier.")
return
}
switch buttonID {
case: "firstButton":
_ = buttonID // Perform firstButton action
case: "secondButton":
_ = buttonID // Perform secondButton action
case: "thirdButton":
_ = buttonID // Perform thirdButton action
default:
// shouldn't get here - error?
}
}
}
In my ViewController I have the following buttons set up as IBOutlets and their identity is the same in Storyboard.
@IBOutlet weak var firstButton: NSButton?
@IBOutlet weak var secondButton: NSButton?
@IBOutlet weak var thirdButton: NSButton?
Then I have my IBActions:
@IBAction func firstButtonClicked(sender: Any?) {
utility.doSomething(sender: sender)
}
@IBAction func secondButtonClicked(sender: Any?) {
utility.doSomething(sender: sender)
}
@IBAction func thirdButtonClicked(sender: Any?) {
utility.doSomething(sender: sender)
}
In my case what i did, just like the answers above i used the tag to identify the specific button, what i added is that i added a UIButton extension that adds an id so that i can set a string id
i had three buttons with tags 0, 1 and 2
Then created the extension
extension UIButton {
var id: String {
let tag = self.tag
switch tag {
case 0:
return "breakfast"
case 1:
return "lunch"
case 2:
return "dinner"
default:
return "None"
}
}
}
When accessing a button in an IBAction i would just call:
sender.id
Select your first button and give it tag 0, and select second button and give it tag 1 and so on, in action check the tag bit and perform you functionalities on the basis of tag bit.:
switch sender as! NSObject {
case self.buttoneOne:
println("do something when first button is tapped")
case self.buttoneTwo:
println("do something when second button is tapped")
default:
println("default")
}
