Can't do regex matching on object using an NSPredicate on a UITextField

Question

Checking email regEx giving error:

Can't do regex matching on object error

in an extension to UITextField.

let emailRegEx : String = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}"
let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
let e = emailTest.evaluate(with: self)

@Carpsen90 It's a `UITextField`. – rmaddy Jan 06 '19 at 17:28 — rmaddy, Jan 06 '19 at 17:28
`let e = emailTest.evaluate(with: self.text!)` – ielyamani Jan 06 '19 at 17:29 — ielyamani, Jan 06 '19 at 17:29

score 3 · Accepted Answer · answered Jan 06 '19 at 17:29

3

self is a UITextField. So you want self.text! so the predicate is run against the text of the text field.

let e = emailTest.evaluate(with: self.text!)

And yes, it's safe to force-unwrap the text property of a UITextField.

answered Jan 06 '19 at 17:29

rmaddy

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Can't do regex matching on object using an NSPredicate on a UITextField

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