What is causing this logic error? - objective-c

Question

Here is my code and here is the output... I do not understand why my if statement above the log is allowing this to happen...This if statement that is nested inside of the for loop should not allow output whenever the fullname is the same the description...
Firebase *firebase = [[Firebase alloc] initWithUrl:[NSString stringWithFormat:#"%#/Recent", FIREBASE]];
FQuery *query = [[firebase queryOrderedByChild:#"groupId"] queryEqualToValue:groupId];
[query observeEventType:FEventTypeChildAdded withBlock:^(FDataSnapshot *snapshot) {
//Is group
if ([snapshot.value[#"type"] isEqual: #"group"]){
self.title = snapshot.value[#"description"];
}
//Is individual
else{
NSString *senderId = snapshot.value[#"userId"];
PFQuery *query = [PFQuery queryWithClassName:PF_USER_CLASS_NAME];
[query whereKey:#"objectId" equalTo:senderId];
query.limit = 1;
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
// Do something with the found objects
for (PFObject *object in objects) {
NSString *userName = [[PFUser currentUser]fullname];
if (object[#"fullname"] != userName){
self.title = object[#"fullname"];
NSLog(#"You're talking to: %#", object[#"fullname"]);
NSLog(#"Logged in user: %#", userName);
}
}
} else {
// Log details of the failure
NSLog(#"Error: %# %#", error, [error userInfo]);
}
}];
}
}];
Heres the log as well
2016-03-12 18:48:09.844 Gibr[34128:1436940] You're talking to: Testerten
2016-03-12 18:48:09.844 Gibr[34128:1436940] Logged in user: Travis Tubbs
2016-03-12 18:48:09.845 Gibr[34128:1436940] You're talking to: Travis Tubbs
2016-03-12 18:48:09.845 Gibr[34128:1436940] Logged in user: Travis Tubbs

Answer 1

The problem that you are using != to compare two strings. But that's not what it's for; it's for comparing objects. The two string variables are not the same object; they are two different objects, two different variables.
If you want to know whether two string variables have the same value as strings, use isEqualToString:.
if (![object[#"fullname"] isEqualToString: userName])