How to test NSCFBoolean value?

Question

the result you've got from [messageDic objectForKey:@"myself"], which is a NSNumber, then you need to convert the result to Bool. So try below:

if ([[messageDic objectForKey:@"myself"]boolValue] == NO)

__NSCFBoolean is a private class that is used in NSNumber class cluster. To extract appropriate value from it you need to use methods from NSNumber class, -boolValue in your case:

BOOL isMyself = [[messageDic objectForKey:@"myself"] boolValue];