Add a prefix to UITextField

Question

I want a \'$\' Sign in the text field which cannot be erased. A user should be able to enter values after it and if he presses backspace it should only erase the value he entere

Answer 1

No need to use shouldChangeCharactersInRange delegate method. The easiest and most convenient solution is this

            var label = UILabel(frame: CGRectMake(0, 0, 50, 50))
            label.text = "$";
            label.backgroundColor = UIColor(white: 0.0, alpha: 0.0)
            tenantField.rightViewMode = .Always
            tenantField.rightView = label