How do I append an object to NSMutableArray?

Question

I want to update an mutable array. i have one array "ListArray" with some keys like "desc", "title" on other side (with click of button.) i have one array name newListArray which is coming from web service and has different data but has same keys like "desc" "title". so i want to add that data in "ListArray" . not want to replace data just add data on same keys. so that i can show that in tableview.

..........So my question is how to add data in "ListArray". or any other way to show that data in tableview but replacing old one just want to update the data

      NSMutableArray *newListArray =  (NSMutableArray*)[[WebServices sharedInstance] getVideoList:[PlacesDetails sharedInstance].userId tokenValue:[PlacesDetails sharedInstance].tokenID mediaIdMin:[PlacesDetails sharedInstance].minId mediaIdMax:[PlacesDetails sharedInstance].maxId viewPubPri:@"Public_click"];

NSDictionary *getNewListDic = [[NSDictionary alloc] initWithObjectsAndKeys:newListArray,@"videoList", nil];

[listVidArray addObject:getNewListDic];




NSArray *keys = [NSArray arrayWithObjects:@"desc",@"url",@"media_id",@"img",@"status",@"media_id_max",@"fb_url",@"title", nil] ;

NSMutableDictionary *dict = [NSMutableDictionary dictionary];

for(int i = 0 ; i < [listVidArray count] ; i++)
{

    for( id theKey in keys) 
    {
       // NSMutableArray *item = [NSMutableArray array];

        NSLog(@"%@",theKey);

        NSLog(@"%@",keys);


        [dict setObject:[[[listVidArray objectAtIndex:i]valueForKey:@"videoList"] valueForKey:theKey] forKey:theKey];

//        [dict  setObject:[newListArray valueForKey:theKey] forKey:theKey];

    }
}

enter image description here

BabyPanda · Accepted Answer · 2012-11-05 08:34:54Z

1

If you the newListArray is totally different from the oldListArray, then clear the old one, and use the new data to fit it.

Otherwise, you need to merge the two arrays. One way is to check if a data in newListArray is/is not in oldListArray and then decide whether to add it into oldListArray.

When oldListArray is updated, call -reloadData of the tableView.

answered Nov 5, 2012 at 8:34

BabyPanda

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2 Comments

DD_ Over a year ago

this is time consuming , to compare with each object!

BabyPanda Over a year ago

but if not pick out the ones already exist in oldList, there may be an issue of repeating data. To pick out things is another story, and of course comparing one by one is not a brilliant way per se. There surely are other ways to do array comparison.

Oscar · Accepted Answer · 2012-11-05 08:35:51Z

1

If I do not misunderstand your question, you may do something like this:

[listArray addObjectsFromArray:newListArray];
[_tableView reloadData];

answered Nov 5, 2012 at 8:35

Oscar

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