Regular expression issue in iOS Swift

Question

Hi I want to do a regular expression of Phone validation. It must match with Android Phone matcher class. So, I tried the following expression but it is not working in one scenario.

Expression: (\+[0-9]+[\- \.])?(\([0-9]+\)[\- \.])?([0-9][0-9\- \.]+[0-9])

It is not working for following number

123d453

But it is working fine in https://regexr.com/ By using (+[0-9]+[- .])?(([0-9]+)[- .])?([0-9][0-9- .]+[0-9])

Please help me.

Code

let phone = "123d4"
        let phonereg = "(\\+[0-9]+[\\- \\.]*)?(\\([0-9]+\\)[\\- \\.]*)?([0-9][0-9\\- \\.]+[0-9])"
        if phone.range(of: phonereg, options: .regularExpression, range: nil, locale: nil) != nil{
            print("valid phone")
        }
        else{
            print("Invalid phone")
        }

ANSWER: Here are the solutions for above issue.

 let phone = "123d4"
        let phonereg = "(\\+[0-9]+[\\- \\.]*)?(\\([0-9]+\\)[\\- \\.]*)?([0-9][0-9\\- \\.]+[0-9])"
        let phoneTest = NSPredicate(format: "SELF MATCHES %@", phonereg)
        let result =  phoneTest.evaluate(with: phone)

        if result{
            print("valid phone")
        }
        else{
            print("Invalid phone")
        }