tableview - 无法识别的选择器didSelectRowAtIndexPath [英] tableview - unrecognized selector didSelectRowAtIndexPath
问题描述
我的应用程序在选择tableView中的内容时崩溃了。这不是100%可重复,但它经常发生。
I have been having an issue with my app crashing on selecting something in the tableView. This is not 100% reproducible, but it happens relatively often.
我的EventListViewController类(UITableViewController的子类)内部发生了什么,我覆盖了didSelectRowAtIndexPath函数,因为我是使用此类中的搜索栏,我希望它只在您不搜索时选择。
What happens is inside my EventListViewController class (a subclass of UITableViewController), I overwrite the didSelectRowAtIndexPath function because I am using a search bar in this class as well, and I want it to only select when you are not searching.
代码如下所示:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(!searching)
[super tableView:tableView didSelectRowAtIndexPath:indexPath];
}
然而,当它崩溃时,我会在异常中断,这就是消息I get,在调用超级函数的行上:
However, when it crashes, I break on exception and this is the message I get, on the line that calls the super function:
[EventListViewController tableView:didSelectRowAtIndexPath:]: unrecognized selector sent to instance 0xa648e50
我在调试器上打印了一些东西,这一切对我来说都很好看:
I printed out some stuff on the debugger and it all looks fine to me:
(lldb) po 0xa648e50
(int) $1 = 174362192 <EventListViewController: 0xa648e50>
(lldb) po self
(EventListViewController *) $2 = 0x0a648e50 <EventListViewController: 0xa648e50>
(lldb) po tableView
(UITableView *) $3 = 0x070fd400 <UITableView: 0x70fd400; frame = (0 0; 320 367); clipsToBounds = YES; autoresize = W+H; layer = <CALayer: 0x6e46750>; contentOffset: {-0, -0}>
(lldb) po indexPath
(NSIndexPath *) $4 = 0x06e8caf0 <NSIndexPath 0x6e8caf0> 2 indexes [1, 1]
(tableView有2个部分,第2个部分有2个条目)
(The tableView has 2 sections,and the second section has 2 entries)
任何人都有任何想法发生了什么?如果您需要更多信息,请告诉我。
Anyone have any Idea what is happening? let me know if you need any more information.
注意:经过更多调查后我发现这是100%可重现的,具有以下步骤:
1:加载应用程序,然后单击两个条目之一。
2:回到tableView控制器
3:点击以下两个条目,在白色空间中不应该有一个单元格
该应用程序将崩溃,但请注意indexPath并没有说它试图选择一个超出tableView边界的单元格,只是因为tableView didSelectRowAtIndexPath方法不存在
Note: after more investigation I have found that this is 100 % reproducible with the following steps: 1: load the app, and click on either of the two entries. 2: Go back to the tableView controller 3: tap BELOW both of the entries, in the white space where there shouldn't be a cell The app will crash, but notice that the indexPath doesn't say its trying to select a cell that is outside the bounds of the tableView, just that the tableView didSelectRowAtIndexPath method doesn't exist
推荐答案
在 tableView:didSelectRowAtIndexPath:
中调用 super
是不必要的。如果我没记错的话, UITableViewController
不提供该方法的默认实现。因此,您对super的调用会导致崩溃。
The call to super
in tableView:didSelectRowAtIndexPath:
is unnecessary. If I remember correctly, UITableViewController
does not provide a default implementation of that method. Thus, your call to super results in a crash.
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