Question

I recently discovered the GDB in Xcode which makes up for some functionality which IMHO seems to be lacking in Xcode.

So I can do the following in GDB:

(gdb) po [LoginManager sharedSession].loginToken
20D52FE9-3573-437E-9A65-846572B63726

However, I have another Service class, which is currently not loaded so I get the following error:

(gdb) po [SessionService displaySessionInfoForToken:@"XXX"]
No symbol "SessionService" in current context.

I don’t understand why the LoginManager can be loaded but not the SessionService.

Answer 1

Try using NSClassFromString, like this:

(gdb) po [NSClassFromString(@"SessionService") displaySessionInfoForToken:@"XXX"]

It’s hard to say exactly what’s going on, but using NSClassFromString may tickle the right thing in the runtime to do what you want.