How do I detect if an object implements NSFastEnumeration protocol in Objective-C? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. 开发者_如何学运维 Closed 11 years ago.

I want to use fast enumeration on an object of type id.

Basically I'm missing the check here:

id object = <get object form somewhere>;
if( <check if object implements fast enumeration> )
    for (id item in id<NSFastEnumeration>object)
        <process item>

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Something like this:

BOOL canBeFast = [yourCollection conformsToProtocol:@protocol(NSFastEnumeration)];