Question

Can someone one explain to me why this code doesn’t work? I have no problem sending the elements of an array to NSLog but they don’t seem to be appending to the string. Do I have to cast the array elements to a string?

    success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
        NSArray *dataarray=[JSON valueForKey:@"Data"];
        NSLog(@"Response: %@", [JSON valueForKeyPath:@"Status"]);
        NSString* output = [NSString stringWithFormat:@"response: %@",[JSON valueForKeyPath:@"Status"]];
        int x;
        for (x=0; x<[dataarray count]; x++) {
            NSLog(@"%d : %@",x, [dataarray objectAtIndex:x]);
            [output stringByAppendingFormat:@" %@ ",[dataarray objectAtIndex:x]];
        }

        //NSLog(@"%@", JSON);
        NSLog(@"%@", output);
        self.outPut2.text=output;    }

Answer 1

The function

 [output stringByAppendingFormat:@" %@ ",[dataarray objectAtIndex:x]];

returns a NEW string, without modifying the original, and you are not storing it anywhere.
You should go like this:

output = [output stringByAppendingFormat:@" %@ ",[dataarray objectAtIndex:x]];