Question

NSString *s1= [btnStreetType titleForState:UIControlStateNormal];

BOOL str= [s1 isEqualToString:s1 ];

In the code above, why does isEqualToString return NO? I have to check whether the title is an empty string or not, but it always returns NO.

Answer 1

I guess s1 or btnStreetType is nil. Otherwhise, there is no reason that test to return NO. Even on empty strings (@””), it should return YES.

Check btnStreetType first, I think the problems comes from it, it may be nil, because titleForState has no reason to return a nil value if called on a valid object.