Email & Phone Validation in Swift

Swift 3.0 to 5.0 Updated Solution:

//MARK: - Validation Extension

extension String {
    
    //To check text field or String is blank or not
    var isBlank: Bool {
        get {
            let trimmed = trimmingCharacters(in: CharacterSet.whitespaces)
            return trimmed.isEmpty
        }
    }
    
    //Validate Email
    
    var isEmail: Bool {
        do {
            let regex = try NSRegularExpression(pattern: "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}", options: .caseInsensitive)
            return regex.firstMatch(in: self, options: NSRegularExpression.MatchingOptions(rawValue: 0), range: NSMakeRange(0, self.count)) != nil
        } catch {
            return false
        }
    }
    
    var isAlphanumeric: Bool {
        return !isEmpty && range(of: "[^a-zA-Z0-9]", options: .regularExpression) == nil
    }
    
    //validate Password
    var isValidPassword: Bool {
        do {
            let regex = try NSRegularExpression(pattern: "^[a-zA-Z_0-9\\-_,;.:#+*?=!§$%&/()@]+$", options: .caseInsensitive)
            if(regex.firstMatch(in: self, options: NSRegularExpression.MatchingOptions(rawValue: 0), range: NSMakeRange(0, self.characters.count)) != nil){
                
                if(self.characters.count>=6 && self.count<=20){
                    return true
                }else{
                    return false
                }
            }else{
                return false
            }
        } catch {
            return false
        }
    }
}

use of Email Validation:

if(txtEmail.isEmail) {

}

Swift 2.0 Solution

Paste these line anywhere in code.(or in your Constant file)

extension String {
    
    //To check text field or String is blank or not
    var isBlank: Bool {
        get {
            let trimmed = stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())
            return trimmed.isEmpty
        }
    }
    
    //Validate Email
    var isEmail: Bool {
        do {
            let regex = try NSRegularExpression(pattern: "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}", options: .CaseInsensitive)
            return regex.firstMatchInString(self, options: NSMatchingOptions(rawValue: 0), range: NSMakeRange(0, self.count)) != nil
        } catch {
            return false
        }
    }
    
    //validate PhoneNumber
    var isPhoneNumber: Bool {
        
        let charcter  = NSCharacterSet(charactersInString: "+0123456789").invertedSet
        var filtered:NSString!
        let inputString:NSArray = self.componentsSeparatedByCharactersInSet(charcter)
        filtered = inputString.componentsJoinedByString("")
        return  self == filtered
        
    }
}

Yes your Error is below in XCode 6.1

This error is occurs because of if conditional have to Bool return type, but in Your if condition Return type is NSPredicate so that you got error swift: Bound value in a conditional binding must be of Optional type you can solve as below.

    var phoneTest = NSPredicate(format: "SELF MATCHES %@", PHONE_REGEX)
         if phoneTest.evaluateWithObject(value) {
                  return (true, .NoError)
             }
                 return (false, .PhoneNumber)
            }

Email-Validations in Swift.

    func isValidEmail(testStr:String) -> Bool {
            print("validate emilId: \(testStr)")
            let emailRegEx = "^(?:(?:(?:(?: )*(?:(?:(?:\\t| )*\\r\\n)?(?:\\t| )+))+(?: )*)|(?: )+)?(?:(?:(?:[-A-Za-z0-9!#$%&’*+/=?^_'{|}~]+(?:\\.[-A-Za-z0-9!#$%&’*+/=?^_'{|}~]+)*)|(?:\"(?:(?:(?:(?: )*(?:(?:[!#-Z^-~]|\\[|\\])|(?:\\\\(?:\\t|[ -~]))))+(?: )*)|(?: )+)\"))(?:@)(?:(?:(?:[A-Za-z0-9](?:[-A-Za-z0-9]{0,61}[A-Za-z0-9])?)(?:\\.[A-Za-z0-9](?:[-A-Za-z0-9]{0,61}[A-Za-z0-9])?)*)|(?:\\[(?:(?:(?:(?:(?:[0-9]|(?:[1-9][0-9])|(?:1[0-9][0-9])|(?:2[0-4][0-9])|(?:25[0-5]))\\.){3}(?:[0-9]|(?:[1-9][0-9])|(?:1[0-9][0-9])|(?:2[0-4][0-9])|(?:25[0-5]))))|(?:(?:(?: )*[!-Z^-~])*(?: )*)|(?:[Vv][0-9A-Fa-f]+\\.[-A-Za-z0-9._~!$&'()*+,;=:]+))\\])))(?:(?:(?:(?: )*(?:(?:(?:\\t| )*\\r\\n)?(?:\\t| )+))+(?: )*)|(?: )+)?$"
            let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
            let result = emailTest.evaluateWithObject(testStr)
            return result
        } 

Use of Email-validation:

    if isValidEmail("[email protected]"){
            print("Validate EmailID")
        }
        else{
            print("invalide EmailID")
        }

Phone-Number Validation in Swift

    func validate(value: String) -> Bool {
            let PHONE_REGEX = "^\\d{3}-\\d{3}-\\d{4}$"
            let phoneTest = NSPredicate(format: "SELF MATCHES %@", PHONE_REGEX)
            let result = phoneTest.evaluate(with: value)
            return result
        }