UITextField delegate

UITextField delegate

    func textFieldDidBeginEditing(textField: UITextField) {
        self.showMessageToUser(nil)
    }
    
    func textFieldDidEndEditing(textField: UITextField) {
        
        if textField.text?.characters.count <= 0    {
            if let hasLabel = textField as? UTTextField {
                hasLabel.changeStatus(.Normal)
            }
        }
    }
    
    func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
        
        if string.characters.count == 0 {
            if textField.text?.characters.count <= 1    {
                if let hasLabel = textField as? UTTextField {
                    hasLabel.changeStatus(.Normal)
                }
            }
        }
        else    {
            if let hasLabel = textField as? UTTextField {
                hasLabel.changeStatus(.Input)
            }
        }
    
        return true
    }
    
    func textFieldShouldReturn(textField: UITextField) -> Bool {
        
        if textField.isEqual(self.emailTextField)    {
            self.passwordTextField.becomeFirstResponder()
        }
        else    {
            textField.resignFirstResponder()
        }
        
        return false
    }
    
    func textFieldShouldClear(textField: UITextField) -> Bool {
        
        if let hasLabel = textField as? UTTextField {
            hasLabel.changeStatus(.Normal)
        }
        
        return true
    }