Move index path by one in TableView (iOS)

Question

I have a chat application, in which i want to increase the index path by one when new chat data come. But it is not happening through my code I am sharing code with screen shot please help.

NSUInteger messageCount = [self numberOfMessages];

if (self.conversation && messageCount > 0) {
    NSLog(@"%ld",(long)indexPathValue.row);
    NSIndexPath* ip = [NSIndexPath indexPathForRow:indexPathValue.row + 1 inSection:0];
    NSLog(@"%ld",(long)ip.row);
    [layerChatTableView scrollToRowAtIndexPath:ip atScrollPosition:UITableViewScrollPositionTop animated:YES];
}

I think what you need is scroll tableview to bottom. This link may help you http://stackoverflow.com/questions/2770158/how-to-scroll-to-the-bottom-of-a-uitableview-on-the-iphone-before-the-view-appea — Tien, May 17 '16 at 10:29

Ramdhas · Answer 1 · 2016-05-17T10:39:37.337

0

Below code allows you to go last indexpath with scroll position of bottom.

[tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:messageCoutnt-1 inSection:0] atScrollPosition:UITableViewScrollPositionButtom animated:NO];

Try and let me know

edited May 17 '16 at 10:39

answered May 17 '16 at 10:34

Ramdhas

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Not we have to move to last row. – Nazish Ali May 17 '16 at 10:35
Move by one row from last visible row, just like whatsapp messeges coming. – Nazish Ali May 17 '16 at 10:36
Check the updated code. Logic behind this, last row in the table and the scroll direction. – Ramdhas May 17 '16 at 10:40

score 0 · Answer 2 · answered May 17 '16 at 11:07

I am assuming that you have handled the datasource updating part and that you are updating the table view on main thread. You can try to add new row at bottom like this:

NSInteger section = 0;
NSInteger newCount = [self tableView:self.tableView numberOfRowsInSection:section];
NSMutableArray *paths = @[].mutableCopy;
[paths addObject:[NSIndexPath indexPathForRow:newCount inSection:section]];
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:paths withRowAnimation:UITableViewRowAnimationNone];
[self.tableView endUpdates];

You can also add more than 1 row with some modifications.

Hope this helps.

Move index path by one in TableView (iOS)

2 Answers2