iOS 7 contact number spaces are not spaces [duplicate]

Answer 1

I looked at this as not getting rid of 'spaces' but being left with only decimal characters. This code did that for me:

phoneNumberString = [[phoneNumberString componentsSeparatedByCharactersInSet:[[NSCharacterSet decimalDigitCharacterSet] invertedSet]] componentsJoinedByString:@""];

This takes out everything that's not a number 0-9.

Swift 4.1:

phoneNumberString = phoneNumberString.components(separatedBy: CharacterSet.decimalDigits.inverted).joined(separator: "")