How null,nill, and lenght 0 object can be checked ???

The simplest way to check NSNull value , nill value, and lenght =0 of object:

static inline BOOL IsEmpty(id object)

{

    return object == nil

    || ([object respondsToSelector:@selector(length)]

        && [(NSData *) object length] == 0)

    || ([object respondsToSelector:@selector(count)]

        && [(NSArray *) object count] == 0)

    || ([object respondsToSelector:@selector(count)]

        && object == nil)

    || ([object respondsToSelector:@selector(count)]

        && [ object isKindOfClass:[NSNull class]]);

    

}

How to call inline function:

 NSString *str =nil;

    

    if(!(IsEmpty(str)))

    {

        NSLog(@"The object is not null, nill,");

    }