__NSArrayI stringByReplacingOccurrencesOfString:withString: in parse data

i make an app that fetch Parse.com website data and save it in to string and assign this string to label text then error is occurred as __NSArrayI stringByReplacingOccurrencesOfString:withString:

My code like as

PFQuery *query = [PFQuery queryWithClassName:@"MapInfo"];
[query whereKey:@"GPIN" equalTo:self.qpinString];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error)   {
    if (!error)
    {
        self.addedBy=[objects valueForKey:@"AddedBy"];
        self.address=[objects valueForKey:@"Address"];
        NSString *addedby=self.addedBy;
        NSLog(@"%@",[[[addedby stringByReplacingOccurrencesOfString:@")" withString:@""] stringByReplacingOccurrencesOfString:@"(" withString:@""] stringByReplacingOccurrencesOfString:@" " withString:@""]);
     }

And when i write code like as

self.nameLabel.text=[NSString stringWithFormat:@"%@",self.addedBy];

then not any error occurred but i get label text with backers and whitespace also with parenthesis so i trim my string but i get this error please help me.