如何重新加载以编程方式移动的行?

问题描述

令人沮丧的事实:调用tableView:moveRowAtIndexPath:toIndexPath:后，该行未调用tableView:cellForRowAtIndexPath:.

Frustrating fact: After calling tableView:moveRowAtIndexPath:toIndexPath:, tableView:cellForRowAtIndexPath: doesn't get called for that row.

在UITableView更新块内的tableView:moveRowAtIndexPath:toIndexPath:之前或之后调用reloadRowsAtIndexPaths:withRowAnimation:也不起作用:这会引发不一致错误.

Call reloadRowsAtIndexPaths:withRowAnimation: after or before tableView:moveRowAtIndexPath:toIndexPath: within UITableView updates block also doesn't work: it raises Inconsistency error.

我看到2种解决方法:删除+插入而不是移动或在另一个更新块中重新加载.

I see 2 workarounds: delete+insert instead of move or do reload within another updates block.

我的问题是:还有其他方法可以在同一更新块内重新加载和移动UITableView的行吗?

My question is: is there some other way to reload and move UITableView's row within same updates block?

推荐答案

我认为不可能同时进行移动和重新加载.我已经尝试了几种方法，而我想出的最好的解决方案是在批处理更新之前进行重新加载.我不设置reloadRows动画，因为它似乎与批量更新动画冲突.

I do not think it is possible to do a move and a reload at the same time. I've tried several approaches and the best solution I've come up with is to do the reload just before the batch updates. I don't animate reloadRows because it seems to conflict with the batch update animations.

[tableView reloadRowsAtIndexPaths:indexPathsToReload withRowAnimation:UITableViewRowAnimationNone];
[tableView beginUpdates];
//inserts, deletes and moves here
[tableView endUpdates];

此外，我通常将单元配置逻辑放在单独的方法中，例如:

Also, I typically put my cell configuration logic in a separate method like:

- (void)tableView:(UITableView *)tableView configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath;

以便我可以直接调用它并完全绕过reloadRowsAtIndexPaths.您也不会以这种方式获得内置动画，但是您可以制作自己的动画.

So that I can just call it directly and bypass reloadRowsAtIndexPaths altogether. You won't get the built in animation this way either, but you can do your own animations.

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