Select text inside a text field

Question

I want the text inside the text box to be highlighted when I click on it.

I want the source text to be deleted the moment someone clicks on the number pad. I tried to use clearButtonMode, but after the size of my text field is very small, the cross icon completely occupies the text field.

Any idea how to achieve this?

Answer 1

It can be achieved

(void)textFieldDidBeginEditing:(UITextField *)iTextField {
    [iTextField selectAll:self];
}

Answer 2

You need to do the same. You can try:

• change the font of the text field (larger, bolder, different color)
• overlay a transparent UIView over the text box.
• changing the background of the text box
• change frame style

...

EDIT: , , , UITextFieldDelegate :

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    textField.text = nil;
}

Answer 3

- UITextField, startFirstResponder .

Answer 4

" ": :

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    [textField performSelector:@selector(selectAll:) withObject:textField afterDelay:0.f];
}

Answer 5

ViewController, :

override weak var delegate: UITextFieldDelegate? {
    didSet {
        if delegate?.isKindOfClass(YourTextField) == false {
            // Checks so YourTextField (self) doesn't set the textFieldDelegate when assigning self.delegate = self 
            textFieldDelegate = delegate
            delegate = self
        }
    }
}

// This delegate will actually be your public delegate to the view controller which will be called in your overwritten functions
private weak var textFieldDelegate: UITextFieldDelegate?

class YourTextField: UITextField, UITextFieldDelegate {

    init(){
        super.init(frame: CGRectZero)
        self.delegate = self
    }

    func textFieldDidBeginEditing(textField: UITextField) {
        textField.performSelector(Selector("selectAll:"), withObject: textField)
        textFieldDelegate?.textFieldDidBeginEditing?(textField)
    }
}

, , , UITextFieldDelegate .

let yourTextField = YourTextField()
yourTextField.delegate = self