How to add another condition in this function - swift

Question

How can i add another condition to my function, for another textfield and how to make this code is more simple
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
if let text = textField.text {
if let floatingLabelTextField = textField as? SkyFloatingLabelTextField {
if(text.characters.count < 3 || !text.containsString("#")) {
floatingLabelTextField.errorMessage = "Invalid email"
}
else {
// The error message will only disappear when we reset it to nil or empty string
floatingLabelTextField.errorMessage = ""
}
}
}
return true
}

Answer 1

Below code will be more simpler and easy to add any new condition:
func isValidEmail(testStr:String) -> Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+#[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailTest = NSPredicate(format:"SELF MATCHES %#", emailRegEx)
return emailTest.evaluate(with: testStr)
}
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
guard let text = textField.text else{
return true
}
guard let floatingLabelTextField = textField as? SkyFloatingLabelTextField else {
return true
}
if isValidEmail(testStr: text) {
floatingLabelTextField.errorMessage = ""
}else{
floatingLabelTextField.errorMessage = "Invalid email"
}
return true
}

Answer 2

func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool
{
if textField == textField as? SkyFloatingLabelTextField && (!textField.text.containsString("#") || textField.text.characters.count < 3 )
{
floatingLabelTextField.errorMessage = "Invalid email"
}
else
{
floatingLabelTextField.errorMessage = ""
}
return true
}
You can check firstly if textfield is your selected textfield and in same condition you can also check email validation.