How to reload UITableView without stopping cell selection animation

问题

When the users taps on a cell, I want to update my UITableView; including the contents of this tapped cell. Easiest way is to update internal parameters and then invoke [self.tableView reloadData];.

However, reloadData immediately stops the nice blue->none selection animation of my tapped cell.

Is there a (standard) way to update my table cells without stopping the tapped cell's animation?

Note in this case I don't add or delete cells; I just want to contents to change (e.g. start an activity indicator, or change the color of labels.)

回答1:

In your case you can just get pointers to all visible cells and update them. Something like this:

- (void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
    NSArray* visibleCells = [tableView indexPathsForVisibleRows];

    for (NSIndexPath* indexPath in visibleCells)
    {
        UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:indexPath];

        [self updateCell:cell atIndexPath:indexPath]; // Your method, which updates content...
    }
}

And if you want to update other cells content you can use something like this:

- (void)tableView:(UITableView*)tableView willDisplayCell:(UITableViewCell*)cell forRowAtIndexPath:(NSIndexPath*)indexPath
{
    [self updateCell:cell atIndexPath:indexPath]; // Your method, which updates content...
}

So your cells will always display correct content.

About creating content:

- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString* CellIdentifier = @"Cell";
    UITableViewCell* cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

        [self createContentForCell:cell atIndexPath:indexPath]; // so here to create content or customize cell
    }

    return cell;
}

回答2:

Or maybe you could simply delay the reload of your table data as described for example here: Delay reloadData on UITableView

来源：https://stackoverflow.com/questions/18418466/how-to-reload-uitableview-without-stopping-cell-selection-animation

标签

ios

objective-c

cocoa-touch

uitableview