Wait for UITableView to finish insert-CodePudding

I'm trying to insert a new row, and immediately make it the first responder.

Using .insertRows() seems to execute asynchronously, even with .none. for the animation. That means that when I call cellForRow(at:), it returns nil.

What would be the best way to wait for the insert to finish, before calling becomeFirstResponder?

This does not work:

self.tableView.insertRows(at: [newIndex], with: .none)
self.tableView.cellForRow(at: newIndex)?.becomeFirstResponder() //Returns nil

CodePudding user response：

Why do you have to use .insertRaws()? I mean, why don't you just call reloadData() after adding new item to array?

self.array.append(newData)   // Add item to data source
self.tableView.reloadData()  // I am not sure if this is required.
let newIndex = IndexPath(row: self.array.count(), section: 0)
self.tableView.cellForRow(at: newIndex)?.becomeFirstResponder()

CodePudding user response：

Put the insertRows(at:with:) call between a beginUpdates() and endUpdates() calls:

self.tableView.beginUpdates()
self.tableView.insertRows(at: [newIndex], with: .none)
self.tableView.endUpdates()

self.tableView.cellForRow(at: newIndex)?.becomeFirstResponder()

Anyway I'm not so fond of letting as first responder a cell in this way: what if it's not visible?