Email validation on textField in iOS

Question

In iOS App, how to add Email validation on UITextField?

Answer 1

Swift

func validateEmail(email:String) -> Bool {

    let stricterFilter = false
    let stricterFilterString = "[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}"
    let laxString = ".+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*";
    let emailRegex = stricterFilter ? stricterFilterString : laxString
    let emailTest = NSPredicate(format: "SELF MATCHES %@", emailRegex)

    return emailTest.evaluate(with: email);
}