What does the -> mean in objective C

Can Anyone explain what this means:

oauth->url = [[NSURL alloc] initWithSc开发者_开发问答heme:@"https" host:host path:unencodedPath];

It is variable assignment but why does it use '->' is this something to do with it being a Class method?

It references the instance variable url of the oauth instance. It is pure C syntax.

Same thing it means in C/C++. Objective C objects don't use -> but C/C++ classes do.