Refresh certain row of UITableView based on Int in Swift

问题

I am a beginning developer in Swift, and I am creating a basic app that includes a UITableView. I want to refresh a certain row of the table using:

self.tableView.reloadRowsAtIndexPaths(paths, withRowAnimation: UITableViewRowAnimation.none)

and I want the row that will be refreshed to be from an Int named rowNumber

The problem is, I don't know how to do this and all the threads I've searched are for Obj-C

Any ideas?

回答1:

You can create an NSIndexPath using the row and section number then reload it like so:

let indexPath = NSIndexPath(forRow: rowNumber, inSection: 0)
tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Top)

In this example, I've assumed that your table only has one section (i.e. 0) but you may change that value accordingly.

Update for Swift 3.0:

let indexPath = IndexPath(item: rowNumber, section: 0)
tableView.reloadRows(at: [indexPath], with: .top)

回答2:

For a soft impact animation solution:

Swift 3:

let indexPath = IndexPath(item: row, section: 0)
tableView.reloadRows(at: [indexPath], with: .fade)

Swift 2.x:

let indexPath = NSIndexPath(forRow: row, inSection: 0)
tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)

This is another way to protect the app from crashing:

Swift 3:

let indexPath = IndexPath(item: row, section: 0)
if let visibleIndexPaths = tableView.indexPathsForVisibleRows?.index(of: indexPath as IndexPath) {
    if visibleIndexPaths != NSNotFound {
        tableView.reloadRows(at: [indexPath], with: .fade)
    }
}

Swift 2.x:

let indexPath = NSIndexPath(forRow: row, inSection: 0)
if let visibleIndexPaths = tableView.indexPathsForVisibleRows?.indexOf(indexPath) {
   if visibleIndexPaths != NSNotFound {
      tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
   }
}

回答3:

Swift 4

let indexPathRow:Int = 0    
let indexPosition = IndexPath(row: indexPathRow, section: 0)
tableView.reloadRows(at: [indexPosition], with: .none)

回答4:

In Swift 3.0

let rowNumber: Int = 2
let sectionNumber: Int = 0

let indexPath = IndexPath(item: rowNumber, section: sectionNumber)

self.tableView.reloadRows(at: [indexPath], with: .automatic)

byDefault, if you have only one section in TableView, then you can put section value 0.

回答5:

let indexPathRow:Int = 0
let indexPosition = IndexPath(row: indexPathRow, section: 0)
tableView.reloadRows(at: [indexPosition], with: .none)

回答6:

SWIFT 4.2

    func reloadYourRows(name: <anyname>) {
    let row = <your array name>.index(of: <name passing in>)
    let reloadPath = IndexPath(row: row!, section: 0)
    tableView.reloadRows(at: [reloadPath], with: .middle)
    }

回答7:

How about:

self.tableView.reloadRowsAtIndexPaths([NSIndexPath(rowNumber)], withRowAnimation: UITableViewRowAnimation.Top)

回答8:

In addition, If you have sections for tableview, you should not try to find every rows you want to refresh, you should use reload sections. It is easy and more balanced process:

yourTableView.reloadSections(IndexSet, with: UITableViewRowAnimation)

回答9:

Swift 4.1

use it when you delete row using selectedTag of row.

self.tableView.beginUpdates()

        self.yourArray.remove(at:  self.selectedTag)
        print(self.allGroups)

        let indexPath = NSIndexPath.init(row:  self.selectedTag, section: 0)

        self.tableView.deleteRows(at: [indexPath as IndexPath], with: .automatic)

        self.tableView.endUpdates()

        self.tableView.reloadRows(at: self.tableView.indexPathsForVisibleRows!, with: .automatic)

回答10:

I realize this question is for Swift, but here is the Xamarin equivalent code of the accepted answer if someone is interested.

var indexPath = NSIndexPath.FromRowSection(rowIndex, 0);
tableView.ReloadRows(new NSIndexPath[] { indexPath }, UITableViewRowAnimation.Top);

来源：https://stackoverflow.com/questions/28206492/refresh-certain-row-of-uitableview-based-on-int-in-swift

标签

ios

uitableview

swift

nsindexpath