How to supress a "Class may not respond to '-method' warning with variable method name?

How can I prevent this warning with a variable selector name?

NSString *method开发者_运维问答Name;

SEL method = NSSelectorFromString(methodName);

if ([self respondsToSelector:method]) {

    if ([methodName hasSuffix:@":"])
        [self method:dict];
    else
        [self method];

}

Use

[self performSelector:method];

Instead of

[self method];

And

[self performSelector:method withObject:dict];

Instead of

[self method:dict];

sidyll's answer works, but there is a better solution.

Generally, you would declare a protocol:

 @protocol MyOptionalMethods
 @optional
 - (void)method:(NSDictionary*)dict;
 @end

And declare your object conforms to the protocol:

id<MyOptionalMethods> foo;
UIView*<MyOptionalMethods> bar; // it'll be a subclass o' UIView and may implement pro to

Then check:

if ([foo respondsToSelector:@selector(method:)])
    [foo method: dict];

That way, the compiler has the opportunity to fully type check all arguments. As well, this pattern is not limited to methods that take no arguments or a single object argument.

As well, this is future-proofed against migration to ARC (since ARC rightly complains mightily about the brittleness of performSelector:).