如何从底部加载tableView

Question

I receive data from the server and when they come to me the table is updated, how to make sure that when the data came the table would creep down to the bottom?

tableView.scrollToBottom(animated: true)

don't working

Answer 1

tableView has no method scrollToBottom, I think you should add this method in the extension of UITableView

Example :

import UIKit

extension UITableView {
    func scrollToBottom(animated: Bool) {
        let y = contentSize.height - frame.size.height
        setContentOffset(CGPoint(x: 0, y: (y<0) ? 0 : y), animated: animated)
    }
}

Answer 2

You can use tableView.scrollToRow(at:at:animated:) . For example, let's assume you have an array of string that are show in the table view:

var items = ["1", "2", "3"]

func scrollToBottom() {
    let indexPathToReach = IndexPath(row: items.count - 1, section: 0)
    tableView.scrollToRow(at: indexPathToReach, at: .bottom, animated: true)
}

Answer 3

1. Update table view data source after receiving data.
2. Reload table view (call reloadData() method) or insert cells (call insertRows(at:with:) method) in main thread.
3. Scroll to bottom (call scrollToRow(at:at:animated:) method) in main thread.