email id validation

validate.swift

// Datatype specifier
enum DataType: Int {
  case Other = 0  // This can be string
  case Number = 1
  case Email = 2
}



// Validate Email
func isEmail(emailString: String) -> Bool {
    // Sample regex for email - You can use your own regex for email
    let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}"
    let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegex)
    return emailTest.evaluate(with: emailString)
}


// Check Datatype
func checkDataType(text: String)-> DataType {
    if let intVal = text.toInt() {
        return DataType.Number
    } else if isEmail(emailString: text) {
       return DataType.Email
    } else {
       return DataType.Other
   }
}

// print datatype
let dataType = checkDataType(text: "Your Input String")
print("DataType = \(dataType)")