iPhone how to get UITextField's text while typing?

Question

I\'m trying to show changes made to a UITextField on a separate UILabel. Is there a way to capture full text of the UITextField after

Answer 1

1. First add one UITextField and UILabel to storyboard / nib
2. Now assign IBOutlet for UILabel (Here I have used myLabel)
3. Assign UITextFieldDelegate to file owner, also implement the same delegate in .h file

4. Use these lines of code:

   - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
   {
       NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string];
       [self updateTextLabelsWithText: newString];
   
       return YES;
   }
   
   -(void)updateTextLabelsWithText:(NSString *)string
   {
        [myLabel setText:string];
   }
   

Hope this helps.

Answer 2

In Swift 3.0:

Some of these solutions were one character behind, or for earlier versions of Swift and Obj-C. Here is what I am using for Swift 3.0

In the class I declared a placeholder to store the text.

var tempName = ""

In ViewDidLoad I used:

nameField.addTarget(self, action: #selector(typingName), for: .editingChanged)

Then I made a function called:

   func typingName(textField:UITextField){

        if let typedText = textField.text {
            tempName = typedText
            print(tempName)
        }
    }

Answer 3

Swift with addTarget Swift 2.0+

   titleTextField.addTarget(self, action: #selector(textFieldTyping), forControlEvents: .EditingChanged)

And implement selector

func textFieldTyping(textField:UITextField)
{
    //Typing
}

Answer 4

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        if textField == yourTextFieldOutletName
        {
           if yourTextFieldOutletName.isEmpty == false
           {
             youtlabelname.text = yourTextFieldOutletName.text!
            }


        }

        return true

    }

func textViewDidEndEditing(_ textView: UITextView) {
       if textField == yourTextFieldOutletName
            {
               if yourTextFieldOutletName.isEmpty == false
               {
                 youtlabelname.text = yourTextFieldOutletName.text!
                }


            } 
    }

Answer 5

Simply handle the "Editing Changed" event

[textField addTarget:self 
              action:@selector(editingChanged:)
    forControlEvents:UIControlEventEditingChanged];

and the selector:

-(void) editingChanged:(id)sender {
   // your code
}

You can do this manually, or with the storyboard by CTRL-Dragging the "Editing changed" Sent event to your .h, creating the editingChanged method for you.

Answer 6

In Swift 2.0+

 class CheckInViewController: UIViewController, UITextFieldDelegate {

 override func viewDidLoad() {
    super.viewDidLoad()

    yourTextField.delegate = self

 }

 func textField(textField: UITextField!, shouldChangeCharactersInRange range: NSRange, replacementString string: String!) -> Bool {
    var updatedTextString : NSString = textField.text as NSString
    updatedTextString = updatedTextString.stringByReplacingCharactersInRange(range, withString: string)

    self.methodYouWantToCallWithUpdatedString(updatedTextString)
    return true
 }

}

Hope it helps you swift pioneers