Testing equality to NSNull

objective-c nsnull

Simply check for:

svcUser == [NSNull null]

This is the approach that Apple mentions in their docs.

objective-c nsnull

NSNull is a class. And like with all classes, you must use isEqual:, not == to see if two objects represent the same value.

if (svcUser && ![svcUser isEqual:[NSNull null]]) {    return [svcUser objectForKey:@"access_level"];}

objective-c nsnull

Using @JE42's approach gives me a warning as of Xcode 5.1. Instead cast it:

(id)svcUser == [NSNull null]

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