In Swift, what is a simple way to see if a string matches a pattern?

Pseudocode examples:

```
if string matches pattern ...

if string =~ pattern ...

```

(I have read the Swift docs and haven't seen a regex capability. I've read about adding a new `=~` operator which is a good idea yet more complex than I'd like because this is for a teaching project. I have tried `rangeOfString` but get the error: 'String' does not have a member 'rangeOfString'. I am looking for a Swift solution, i.e. not typing NSRegularExpression. I do not need to do anything with the match result data.)