Is it possible to refresh a single UITableViewCell in a UITableView

Question

I have a custom UITableView using UITableViewCells  Each UITableViewCell has 2 buttons  Clicking these buttons will change an image in a UIImageView within the cell   Is it possible to refresh each cell separately to display the new image  Any help is appreciated

User · Answer

reloadRowsAtIndexPaths  is fine  but still will force UITableViewDelegate methods to fire   The simplest approach I can imagine is   UITableViewCell  cell    self tableView cellForRowAtIndexPath indexPath    self configureCell cell forIndexPath indexPath     It s important to invoke your configureCell  implementation on main thread  as it wont work on non-UI thread  the same story with reloadData reloadRowsAtIndexPaths    Sometimes it might be helpful to add   dispatch async dispatch get main queue             self configureCell cell forIndexPath indexPath         It s also worth to avoid work that would be done outside of the currently visible view   BOOL cellIsVisible     self tableView indexPathsForVisibleRows  indexOfObject indexPath     NSNotFound  if  cellIsVisible

User · Answer

Here is a UITableView extension with Swift 5   import UIKit  extension UITableView           func updateRow row  Int  section  Int   0                let indexPath   IndexPath row  row  section  section           self beginUpdates           self reloadRows at   indexPath as IndexPath   with  UITableView RowAnimation automatic          self endUpdates              Call with   self tableView updateRow row  1

User · Answer

Once you have the indexPath of your cell  you can do something like    self tableView beginUpdates    self tableView reloadRowsAtIndexPaths  NSArray arrayWithObjects indexPathOfYourCell  nil  withRowAnimation UITableViewRowAnimationNone    self tableView endUpdates      In Xcode 4 6 and higher    self tableView beginUpdates    self tableView reloadRowsAtIndexPaths   indexPathOfYourCell  withRowAnimation UITableViewRowAnimationNone    self tableView endUpdates      You can set whatever your like as animation effect  of course

User · Answer

Just to update these answers slightly with the new literal syntax in iOS 6--you can use Paths     indexPath  for a single object  or Paths     indexPath1  indexPath2      for multiple objects   Personally  I ve found the literal syntax for arrays and dictionaries to be immensely useful and big time savers   It s just easier to read  for one thing   And it removes the need for a nil at the end of any multi-object list  which has always been a personal bugaboo   We all have our windmills to tilt with  yes   -   Just thought I d throw this into the mix   Hope it helps

User · Answer

Swift 3     tableView beginUpdates   tableView reloadRows at   indexPath   with   automatic  tableView endUpdates

User · Answer

Swift   func updateCell path Int       let indexPath   NSIndexPath forRow  path  inSection  1       tableView beginUpdates       tableView reloadRowsAtIndexPaths  indexPath   withRowAnimation  UITableViewRowAnimation Automatic    try other animations     tableView endUpdates

User · Answer

I tried just calling - UITableView cellForRowAtIndexPath    but that didn t work  But  the following works for me for example  I alloc and release the NSArray for tight memory management   -  void reloadRow0Section0       NSIndexPath  indexPath    NSIndexPath indexPathForRow 0 inSection 0       NSArray  indexPaths     NSArray alloc  initWithObjects indexPath  nil        self tableView reloadRowsAtIndexPaths indexPaths withRowAnimation UITableViewRowAnimationNone        indexPaths release

User · Answer

If you are using custom TableViewCells  the generic   self tableView reloadData         does not effectively answer this question unless you leave the current view and come back  Neither does the first answer   To successfully reload your first table view cell without switching views  use the following code     For iOS 5 and later -  void reloadTopCell       NSIndexPath  indexPath    NSIndexPath indexPathForRow 0 inSection 0       NSArray  indexPaths     NSArray alloc  initWithObjects indexPath  nil        self tableView reloadRowsAtIndexPaths indexPaths withRowAnimation UITableViewRowAnimationNone       Insert the following refresh method which calls to the above method so you can custom reload only the top cell  or the entire table view if you wish    -  void refresh  UIRefreshControl   refreshControl         call to the method which will perform the function      self reloadTopCell          finish refreshing       refreshControl endRefreshing       Now that you have that sorted  inside of your viewDidLoad add the following     refresh table view UIRefreshControl  refreshControl     UIRefreshControl alloc  init     refreshControl addTarget self action  selector refresh   forControlEvents UIControlEventValueChanged     self tableView addSubview refreshControl     You now have a custom refresh table feature that will reload the top cell  To reload the entire table  add the    self tableView reloadData   to your new refresh method    If you wish to reload the data every time you switch views  implement the method     ensure that it reloads the table view data when switching to this view -  void  viewWillAppear  BOOL animated        self tableView reloadData

User · Answer

I need the upgrade cell but I want close the keyboard  If I use   let indexPath   NSIndexPath forRow  path  inSection  1  tableView beginUpdates   tableView reloadRowsAtIndexPaths  indexPath   withRowAnimation  UITableViewRowAnimation Automatic    try other animations tableView endUpdates     the keyboard disappear

[objective-c] Is it possible to refresh a single UITableViewCell in a UITableView?

Examples related to objective-c

Examples related to uitableview