reloadData 仅在 tableView 可见单元格上

Question

Is that possible? To reload only the cells that are visible in order to do it more efficient.

Answer 1

That's how table views work by default. The UITableView class never loads cells until they're about to appear onscreen, even when you call reloadData .

Answer 2

To reload visible cells of tableview in Swift 3.0:

guard let visibleRows = pTableView.indexPathsForVisibleRows else { return }

pTableView.beginUpdates()

pTableView.reloadRows(at: visibleRows, with: .none)

pTableView.endUpdates()

Answer 3

Try this, You can reload any cell of the tableview using reloadRowsAtIndexPaths:

[self.tableView beginUpdates];
[self.tableView reloadRowsAtIndexPaths:[self.tableView indexPathsForVisibleRows]
                 withRowAnimation:UITableViewRowAnimationNone];
[self.tableView endUpdates];