iphone - Compiler gives warning on performSelectorOnMainThread:@selector(delegateMethod) -

i have nsoperation wraps web service functionality. nsoperation has delegate messaged when operation over.

as nsoperation lives on different thread have make call this:

[delegate performselectoronmainthread:@selector(getdealersidsuccess:) withobject:result waituntildone:yes]; 

it works fine, gives me warning:

warning: '-performselectoronmainthread:withobject:waituntildone:' not found in protocol(s)

i agree compiler on one, sees delegate, checks protocol, finds no declaration of performselector method.

my question is: can remove warning making call in different manner?

my 2 guesses (1) write method called

- (void) calldelegatemethodonmainthred {     [delegate getdealersidsuccess:result] } 

and call through performselectoronmainthread, find solution cumbersome , extra, hard read, step on top of delegation.

the second solution cast delegate type of parent object inside selector, plain crazy , goes against delegate encapsulation pattern.

i appreciate third solution better understanding of language:)

thank in advance.

edit: added delegate declaration:

id <isdealersiddelegate> delegate; 

i declare delegate id. delegate self extends uiviewcontroller.

i see declaring nsobject work.

performselectoronmainthread:withobject:waituntildone: method declared in nsobject class. if delegate object inherits nsobject can declare as

nsobject<mydelegateprotocol> *delegate; 

so compiler know delegate responds nsobject's methods , won't issue warning.