How to pass button title to label in different view controller

Question

On a new project, I have 2 view controllers (View1 and View2).
I have a button in View1 and a label in View2. When I press this button in View1, I want the name/title of the button to appear in the label on View2 when I am transferred to the View2 page. How can I do this?

I checked this page but didn't really understand: Passing button title to a new view

that's because they're in obj-c, not swift - but do you understand the principle that the answer is trying to explain about how you should approach the problem? — Wain, Jan 07 '16 at 13:02
I don't quite understand the "you need to create a property" bit — tabbi, Jan 07 '16 at 13:05
that exposes the label on the second view so you can pass it information — Wain, Jan 07 '16 at 13:10
Possible duplicate of [Passing Data between View Controllers](http://stackoverflow.com/questions/5210535/passing-data-between-view-controllers) — CaptJak, Jan 07 '16 at 17:40
Are you using storyboard? There are 2 ways to handle this.....I would like to know if the button you will tap will perform a segue ??? — OverD, Jan 07 '16 at 21:31
@CaptJak As you said, it is a duplicate. Just in a different language. I don't have enough experience with programming to understand it in Objective C and convert it to Swift. — tabbi, Jan 08 '16 at 07:56

score 2 · Answer 1 · edited Jan 07 '16 at 16:07

2

Create a new CocoaTouch Class SecondViewController, subclassing UIViewController including XIB and create IBOutlet for the label

Declare a variable:

var labelTitle: String! in SecondViewController

SecondViewController ViewDidLoad will look like this:

override func viewDidLoad() {
            super.viewDidLoad()

            titleLabel.text = labelTitle
}

// Whereas titleLabel is the UILabel Outlet connected from XIB

Now in your FirstViewController, on your button Tapped action

add the following

@IBAction func buttonAction(sender : UIButton) {
    // If the VCs are in a storyboard you will need to get the storyboard to access them
    let mainStoryboard = UIStoryboard(name: "Main", bundle: nil) as UIStoryboard
    let secondVC = mainStoryboard.instantiateViewControllerWithIdentifier("SecondViewController") as! SecondViewController
    secondVC.labelTitle = sender.titleLabel?.text

    // If not do this
    let secondVC = SecondViewController.init(nibName: "SecondViewController", bundle: nil)
    secondVC.labelTitle = sender.titleLabel?.text
}

//Next present or push your ViewController

edited Jan 07 '16 at 16:07

brl214

527
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answered Jan 07 '16 at 13:48

Mohammed Shakeer

1,446
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How do I assign labelTitle to my UILabel? – tabbi Jan 07 '16 at 14:35
Thank you so much! For the code in FirstViewController, I keep getting a "expected declaration" error on the second line. – tabbi Jan 07 '16 at 15:30
and what is "button tapped action"? – tabbi Jan 07 '16 at 15:51
button tapped action is IBAction on the button. please check the edited answer – Mohammed Shakeer Jan 07 '16 at 16:09
You could also do it with a segue, no? – CaptJak Jan 07 '16 at 16:33
Thanks again for your response! Now I get "Value of type "UIButton" has no member "label(title of label)". – tabbi Jan 07 '16 at 16:45
@CaptJak is there a way to pass button title info to another viewcontroller using segue? – tabbi Jan 07 '16 at 16:47

score -1 · Answer 2 · answered Jan 07 '16 at 13:00

- On View2 create property for accepting button title

@interface View2 : UIViewController {

}
@property (nonatomic, strong) IBOutlet UILabel *lblTitle;
@property (nonatomic, strong) NSString *btnTitle;

- (void)viewDidLoad {
    [super viewDidLoad];
   self.lblTitle.text = self.btnTitle;
}

In View1

  @interface View1 : UIViewController {

    }
    @property (nonatomic, strong) IBOutlet UIButton *btn;

    - (void)myButtonClicked:(id)sender{

    View1 *newViewController = [[View1 alloc] initWithNibName:'View1' bundle:nil];
    newViewController.btnTitle = self.btn.titleLabel.text;

    // push or present controller

    }

How to pass button title to label in different view controller

2 Answers2