CODEWITHSUNDEEP
iosobjective-cswiftuitableviewscroll
Borzh
Borzh

Reputation: 5195

UITableView how to continue scrolling after reload

I have a UITableView in my application. When the table is scrolled almost to the end, I download more data and reload the table.

If the tableView was scrolling, at the time I call [tableView reloadData]; scrolling stops. How can I achieve effect of not stopping the scroll meanwhile reloadData? I think I need to somehow save scrolling speed and then restore it, but how to do this?

P.D. I really searched this question before asking.

Upvotes: 2

Views: 1865

Answers (3)

Tran Minh
Tran Minh

Reputation: 171

if i am not wrong you are looking for a function call Lazy load. I can recommend you to search SVPullToRefresh here!

Upvotes: 1

Frane Poljak
Frane Poljak

Reputation: 2365

Since UITableView is subclass of UIScrollView, you can use UIScrollViewDelegate's scrollViewWillEndDragging:withVelocity:targetContentOffset: method to determine how far it is supposed to scroll and then after table reload call setContentOffset:animated: with that target offset (or beginning/ending of tableview if it becomes smaller) to simulate continued scrolling EDIT: since your targetContentOffset is probably going to be CGRectZero, you will have to recalculate it somehow using velocity from the same method

Upvotes: 1

Arthur Gevorkyan
Arthur Gevorkyan

Reputation: 2107

I thing, this method (insertRowsAtIndexPaths:withRowAnimation:) is the key.

There is a use case and a nice tip described on SO: the use case and the tip.

Upvotes: 2

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