Objective-C class -> string like: [NSArray className] -> @"NSArray"
NSString *name = NSStringFromClass ([NSArray class]);
You can even go back the other way:
Class arrayClass = NSClassFromString (name);
id anInstance = [[arrayClass alloc] init];
Here's a different way to do it with slightly less typing:
NSString *name = [NSArray description];
Consider this alternative:
const char *name = class_getName(cls);
It's much faster, since it doesn't have to alloc NSString object and convert ASCII to whatever NSString representation is. That's how NSStringFromClass() is implemented.