How to find which row/cell at center of the Screen in UITableView?

Question

i have UITableview , many rows/cell in tableview.

when UITableview scrolling at that time , find which row/cell at center of the Screen.

Answer 1

There are a couple of options for getting the central row. One would be to get the indexPath at the centre:

NSIndexPath *indexPathAtCenter = [self.tableView indexPathForRowAtPoint:CGPointMake(self.tableView.bounds.size.width/2, self.tableView.bounds.size.height/2)];
UITableViewCell *centerCell = [self.tableView cellForRowAtIndexPath:indexPathAtCenter];

Alternatively you could get all visible indexPaths and choose the middle one:

NSArray<NSIndexPath*> *visibleIndexPaths = [self.tableView indexPathsForVisibleRows];
NSIndexPath *middleIndexPath = visibleIndexPaths[visibleIndexPaths.count/2];
UITableViewCell *centerCell = [self.tableView cellForRowAtIndexPath: middleIndexPath];

Depends on the rest of your implementation which route you want to go!

Answer 2

In Swift 4

For exact index number at center we can simply use:-

let middleIndex = ((heightTableView.indexPathsForVisibleRows?.first?.row)! + (heightTableView.indexPathsForVisibleRows?.last?.row)!)/2