What I want to do is set some boolean in the if statement below to true if anything other than letters, numbers, dashes and spaces is contained in the textField.
Then for an email field check for a valid email.
This is how I'm checking for length:
if countElements(textField.text!) < 2 || countElements(textField.text) > 15 {
errorLabel.text = "Name must have between 2 and 15 characters."
self.signUpView.signUpButton.enabled = false
} else {
errorLabel.text = ""
self.signUpView.signUpButton.enabled = true
}
This if statement is inside the UITextFieldDelegate method textFielddidEndEditing. I have a feeling I'll have to use some form of regex to check for a valid email.
Would it make sense to use a regex to check a field only contains the characters I allow and return a boolean that'll tell me if the text field contains disallowed characters so I can then show an error message.
Is there some preferred way to do this? In objective-c I used NSCharacterSet but not sure how to implement that here.
Thanks for your time
This is how I done it in the end.
Thanks to the blog post: http://toddgrooms.com/2014/06/18/unintuitive-swift/