addObject replaces previous object in NSMutableArray - objective-c

Question

I'm trying to add objects to a NSMutableArray through a for loop. But it seems whenever I add an object it replaces the old one so that I only have one object in the array at the time...
Do you have any idea of what might be wrong?
- (void)viewDidLoad
{
[super viewDidLoad];
LoginInfo *info = [[LoginInfo alloc] init];
info.startPost = #"0";
info.numberOfPosts = #"10";
info.postType = #"1";
getResults = [backendService getAllPosts:info];
for (NSInteger i = 0; i < [getResults count]; i++) {
Post *postInfo = [[Post alloc] init];
postInfo = [getResults objectAtIndex:i];
dataArray = [[NSMutableArray alloc] init];
[dataArray addObject:postInfo.noteText];
NSLog(#"RESULT TEST %#", dataArray);
}
}
It's the RESULT TEST log that always shows only the last added string in the output.

Answer 1

you are initialising the dataArray inside the for loop, so everytime it is created again (which means there are no objects) and a new object is added
move
dataArray = [[NSMutableArray alloc] init];
to before the for loop
also there is no need to alloc/init the postInfo object when you immediately override it with the object from the getResults array

Answer 2

You keep re-initializing the array for every run of the loop with this line:
dataArray = [[NSMutableArray alloc] init];
So dataArray is set to a new (empty) array for every run of the loop.
Initialize the array before the loop instead. Try something like this:
dataArray = [[NSMutableArray alloc] init];
for (NSInteger i = 0; i < [getResults count]; i++) {
PostInfo *postInfo = [getResults objectAtIndex:i];
[dataArray addObject:postInfo.noteText];
NSLog(#"RESULT TEST %#", dataArray);
}