UI TableView Add rows at the beginning of the table view i.e at position -1

Question

I have UITableview which has number of items like this

item4
item3
item2
item1

So when the user scrolls scrolls past item4 to the top i want to use func refresh to get item5, item6 and item 7 from core data and insert them to the top of the table view to look like

item7
item6
item5
item4
..
item1

When i do this i want to keep the scroll at item 4.

When i tried doing this and reload the table and scroll to to indexpath of item 4 user can easily notice this as some weird scroll happening. For scrolling to index path i have set the animation bool to false. So

1.Is there a way to add items at index positions -1, -2 and so on or reloading the entire table to only option

OR

2.Is there a way to hold the scroll position even after the table reload (I can identify the last row shown by itemId and get the indexpath of the item while reloading and scroll to that index path but this results in a weird scroll effect even after setting the animation bool to .none)

P.S :I am using swift 3

Thanks for any help in advance

refer this one. https://stackoverflow.com/a/39903447/1746086 — Shah Nilay, Sep 01 '17 at 11:16

score 0 · Accepted Answer · edited Sep 02 '17 at 08:43

This worked for me.

In your get_Data_From_Server method:

arrayData.insert(your_data, at: 0)
self.tableView.reloadData()
self.tableView.contentOffset.y += calculated_size_of_the_cell_you_inserted

You'll see the row insertion and scrolling if the table does not have enough number of cells filling its entire view.

Once the table's view is filled with cells, new cell will be inserted at the top and table will hold its scroll position.

UI TableView Add rows at the beginning of the table view i.e at position -1

1 Answers1