Are you sure? What would such an URL look like? Because the following code seemed to work when I tested it in CodeRunner:
```Objective-C
NSURL *u = [NSURL URLWithString:@"ssh+git://github.com/test/repo.git"];
NSLog(@"u: %@, class = %@", u, u.class);
```
Outputs: `u: ssh+git://github.com/test/repo.git, class = NSURL`