Closed MichealSBingham closed 7 years ago
Add this extension to String in order to test if a string contains only numbers.
var isNumber : Bool { get{ return !self.isEmpty && self.rangeOfCharacter(from: CharacterSet.decimalDigits.inverted) == nil } }
Add this code to func validate() from extension
else if self.isNumber{ let message = "Usernames cannot contain all numbers." completion(false, message) }
Done.
Add this extension to String in order to test if a string contains only numbers.
Add this code to func validate() from extension