Allow only email for UITextField input Swift iOS8

Question

I try to ask users to sign up the member with their email address as the username. In the textfield of username, I have changed the keyboard type into "Email Address". But, how do I restrict users enter email address into the textfield.

Thank you for your time.

Yes, I didn't find yesterday. Thanks. – icelemon Aug 06 '15 at 16:09 — icelemon, Aug 06 '15 at 16:09

score 2 · Accepted Answer · answered Aug 06 '15 at 07:00

2

You can use this code to validate email address:

@IBOutlet weak var emailText: UITextField!
@IBAction func logIn(sender: AnyObject) {

    let validLogin = isValidEmail(emailText.text)
    if validLogin {
        println("User entered valid input")
    } else {
        println("Invalid email address")
    }
}

func isValidEmail(testStr:String) -> Bool {
    let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
    let range = testStr.rangeOfString(emailRegEx, options:.RegularExpressionSearch)
    let result = range != nil ? true : false
    return result
}

answered Aug 06 '15 at 07:00

Dharmesh Kheni

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Thank you very much. It works for me very well. – icelemon Aug 06 '15 at 16:19
Happy to help you..:) – Dharmesh Kheni Aug 06 '15 at 16:20

score 1 · Answer 2 · answered Aug 06 '15 at 06:57

Although it's a duplicate, but may I suggest using SSValidationTextField It's an API that I wrote sometime back. Sample code looks something like

var phoneValidationTextField = SSValidationTextField(frame: CGRectMake(200, 200, 150, 50))
phoneValidationTextField.validityFunction = self.isValidPhone
phoneValidationTextField.delaytime = 0.5
phoneValidationTextField.errorText = "Incorrect Format"
phoneValidationTextField.successText = "Valid Format"
phoneValidationTextField.borderStyle = UITextBorderStyle.RoundedRect
self.addSubview(phoneValidationTextField)

And a typical validity function looks like

func isValidEmail(stringValue: String) ->Bool {
    let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"
    let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
    return emailTest.evaluateWithObject(stringValue)
}

It takes care rest of validation itself.

Allow only email for UITextField input Swift iOS8

2 Answers2