Check which Textfield is calling textFieldDidBeginEditing

Question

I have several textFields on my screen and would like to know which one of them started an action.

For example:

func textFieldDidBeginEditing(textField: UITextField) {
    if textField // aqui eu não sei comparar para ver qual textField iniciou essa chamada
}

I can use the Outlet of each textField or there is another way to do this?

Answer 1

Yes, you can use Outlet to make this check.

Basically you would do that:

@IBOutlet weak var text1: UITextField!
@IBOutlet weak var text2: UITextField!

func textFieldDidBeginEditing(textField: UITextField) {

 if textField == text1 {
    print("Text 1 mudou");
 } else if textField == text2 {
    print("Text 2 mudou");
 } else {
    print("outro text mudou");
 } 
}

Another way you can do this is by checking the Uitextview tag. For example, taking into account that text1 has the tag '1' and text2 with the tag '2' the code would look like this:

 @IBOutlet weak var text1: UITextField!
 @IBOutlet weak var text2: UITextField!

     func textFieldDidBeginEditing(textField: UITextField) {

        if(textField.tag == 1) {
            print("Text 1 changed");
        } else if(textField.tag == 2) {
            print("Text 2 changed");
        } else {
            print("Text ?? changed");
        }
    }

Taking into account both forms, it is possible to observe that through the Outlet the code becomes more readable.

Edit: As a complement to Luis, it is also possible to use constants to compare tags, as in the example:

let kTextField1 = 1;
let kTextField2 = 2;

func textFieldDidBeginEditing(textField: UITextField) {

    if(textField.tag == kTextField1) {
        print("Text 1 changed");
    } else if(textField.tag == kTextField2) {
        print("Text 2 changed");
    } else {
        print("Text ?? changed");
    }
}