How to remove non numeric characters from phone number in objective-c?

Question

This is my first attempt to make an ios app.

I\'m using people picker to ask the user for a phone number, but when it retrieves with the code below, my NSStrin

Answer 1

SWIFT 5.0 solution

let purePhoneNumber = phoneNumber.replacingOccurrences(of: "[^0-9]", 
                                                       with: "", 
                                                       options: .regularExpression)

If you want to leave + sign in string, you can use regexp [^0-9+].