How to stop protocols from generating warnings?

if I have a protocal defined, then it always generate a lot of warnings when compile.

like

@property (retain) id <SomeProc> value

then in the code: [value class]; ... [value release] the compiler always complain it "may not have class or release defined".

Is there a way to fix t开发者_开发百科his?

Yes:

@protocol SomeProc <NSObject>
…
@end

This way your protocol will also contain all the methods required by the NSObject protocol.