UITableview Reload Data

Discussion in 'iOS Programming' started by jjardim, Sep 23, 2010.

  1. macrumors newbie

    Mar 19, 2008
    -iPad Application-
    I have a tableview with custom tableview cells with some dynamic data in it.

    Tasks 1 of 4 complete

    on the same screen I have a check box that completes the task. I am unable to get the tasks to change from 'Tasks 2 of 4 complete' unless I manually SCROLL the cell off the screen and then back on - I've tried [tableview reloadData] no luck. Is there a method to redraw the visible cells?

    Jason Jardim
  2. macrumors 6502a

    Nov 9, 2007
    Colchester, UK
    You can also use - (void)reloadRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation but if reloadData isn't working then I'm not sure that will either.

    Is the cell that displays "x of y tasks complete" a custom subclass of UITableViewCell or are you using one of the built-in styles?
  3. Moderator


    Staff Member

    Sep 2, 2004
    The Centennial State
    reloadData should do the trick. In fact, it really only reloads visible cells. But perhaps some code, especially your tableView:cellForRowAtIndexPath:, would better help us diagnose.
  4. macrumors 68030


    Sep 2, 2008
    If you look at Apple's tableViewSuite sample code it does some things like this. One of the examples shows the time zones around the world and displays an icon that indicates whether it's day or night at each location and updates this dynamically as time changes.
  5. macrumors regular

    Aug 26, 2010

    Normally you want to use reloadRowsAtIndexPaths:withRowAnimation:. Tableview reloadData redraws all visible views which can be heavy. However if you are not getting the update with reloadData, reloadRowsAtIndexPaths will not help. How exactly are you updating your datasource.

    umm just a shot in the dark but but are you doing [tableView reloadData] or [self.tableView reloadData].

    Also make sure you're updating the dataSource before reloading the table.

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