didSelectRowAtIndexPath返回错误的IndexPath [英] didSelectRowAtIndexPath returns wrong IndexPath

问题描述

我遇到了一个非常令人费解的错误。我的UITableView的第一个行返回 1 ，第二个在indexPath中返回 0 ！怎么可能呢？

I have encountered a really puzzling bug. The first row of my UITableView returns 1 and the second one returns 0 in the indexPath! How is that even possible?

在我的` - （void）viewDidLoad`中，一切都还可以。我正在成功突出显示第一行

In my `-(void)viewDidLoad` everything is still fine. I am highlighting the first row successfully with

currentRow = 0;
[tableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:currentRow inSection:0] 
  animated:NO scrollPosition:UITableViewScrollPositionNone];

我有变量 currentRow 用于跟踪哪个行被选中（另一个控件根据当前选择的那个而改变）。

I have the variable currentRow for tracking which row is selected (another control changes according to which one is currently selected).

现在在我的`didDeselectRowAtIndexPath`委托函数中我有：

Now in my `didDeselectRowAtIndexPath` delegate function I have:

-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {
...
NSLog(@"IndexPath: %@", [indexPath description]);
}

日志显示以下内容：

IndexPath：< NSIndexPath 0x79509d0> 2个索引[0,0] 当我触摸第二个行时，
IndexPath：< NSIndexPath 0x79509d0>当我触摸第一行时，2个索引[0,1] 。

IndexPath: <NSIndexPath 0x79509d0> 2 indexes [0, 0] when I touch the second row, and IndexPath: <NSIndexPath 0x79509d0> 2 indexes [0, 1] when I touch the first row.

没有行插入或删除或排序等，甚至不滚动。它是一个简单的UITableView，分组样式，有1个部分和3行。造成这种情况的原因是什么？

There are is no row insertion or deletion or sorting, etc., not even scrolling. It is a simple UITableView, grouped style, with 1 section and 3 rows. What could be causing this?

感谢您的帮助，

S

Thanks for your help,
S

推荐答案

您已实施 De selectRowAtIndexPath 。当不再选择行时，它将被触发。

You have implemented didDeselectRowAtIndexPath. It will be fired when the row is no longer selected.

当您触摸第二行时，第一行不再被选中，因此将显示[0,1]。

当您再次触摸第一行时，第二行现在不再被选中，因此将显示[0,0]。

When you touch the second row, the first row is no longer selected, so [0, 1] will be shown.
When you touch the first row again, the second row is now no longer selected, so [0, 0] will be shown.

完全可以预期。

实施做了选择 RowAtIndexPath 如果你需要它来选择选择行。

Implement didSelectRowAtIndexPath if you need it to respond when the row is selected.

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    //                                       ^
    ...

    NSLog(@"IndexPath: %@", [indexPath description]);
}

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