uinavigationcontroller 在弹出时更新之前的视图
我有一个 UINavigationController，我从 Level1 转到 Level2，在其中选择行/项目；然后我使用后退按钮返回 - 但是 - 在我的级别 1 中，我显示了默认选择（我通过转到级别 2 并选择其他内容来更改它） - 而我的级别 1 根本没有改变，所以我猜想viewDidLoad 不再被调用...我如何强制它重新加载？
非常感谢
干杯 吉比
编辑1： 我知道你是对的，但它不起作用 - 我问自己是否它与可重复使用单元的所有内容有关，因此它不会重新加载......这可能吗？还有更多想法
编辑2： 事实上，它不起作用意味着我将所有代码（事实上我将其移动）从 didLoad 复制到了 viewWillAppear - 这是正确的做法吗？ 或者应该尝试在正确的位置更新我的 nsmutablearray ？ 谢谢。干杯
编辑3：事实上，在我的代码中添加更多标志/消息来了解发生了什么，虽然在重新显示时调用 viewWillAppear，但可见单元格并未“重新绘制/刷新”。因此，如果我向下滚动然后向上滚动，神奇地，更改会起作用并出现，但我希望这种情况从一开始就发生。任何想法请帮忙。谢谢
I have a UINavigationController and I go from Level1 to Level2 where I select a row/item ; and then I go back using the back button - BUT - in my level 1 I was displaying a default selection (which I changed by going to Level2 and select something else) - and my level 1 does not change at all so I guess that the viewDidLoad is not called again... how do I force it to reload?
Thanks a lot
Cheers
geebee
EDIT1:
i know you are right but it didn't work - I was aksing myself if it has to do with all the stuff about re-usable cells and so it does not reload... is that possible? any more ideas
EDIT2:
in fact, it didn't work means that I copied all the code (I moved it in fact) from didLoad to viewWillAppear - was that the right thing to do?
or should have tried to update my nsmutablearray at the right place?
Thanks. Cheers
edit 3: in fact, putting some more flags/messages in my code to understand what is going on, although viewWillAppear is called when re-displayed, the visible cells are not "repainted/refreshed". as such if I scroll down then up, magically the changes are working and appear BUT I would like this to happen right from the start. any idea please help. thanks
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-viewDidLoad在 UIViewController 的生命周期内仅被调用一次。它在请求视图控制器的视图后立即调用，例如通过访问其view属性。因此，在您的情况下，您希望将重新加载代码放在-viewWillAppear:中。每次显示视图控制器的视图时都会调用此方法。-viewDidLoadis called only once during the lifetime of a UIViewController. It is called right after the view controller's view is requested, such as by accessing itsviewproperty. Therefore, in your case you want to put your reloading code in-viewWillAppear:. This method is called every time your view controller's view is displayed.您可以将更新代码放入控制器的
-viewWillAppear:方法中You can put your updating code to controller's
-viewWillAppear:method但是 -viewWillAppear 在 ios 4.3 中没有被调用，它在 ios 5.0 及更高版本中被调用
But -viewWillAppear is not called in ios 4.3, it does get called in ios 5.0 and up