在屏幕变为黑色后不活动，调用什么方法？ [英] What method is called before the screen goes black after inactivity?

问题描述

我想在应用程式关闭前执行一些方法，因为使用者没有活动（例如萤幕变黑，手机在您未触碰一段时间后已锁定）。在发生这种情况时，会调用什么方法？

我猜猜：

• 此方法/这些方法将是我的AppDelegate类的一部分。


• 此方法/这些方法类似于 - [UIAppDelegate applicationWillResignActive：] ， - [UIAppDelegate applicationDidEnterBackground：] ， - [UIAppDelegate willTerminate：] li>
  

我在UIApplicationDelegate的文档中没有看到任何内容，我有困难Googling正确的术语（例如，方法不活动应用目标c ）。我也没有在Stack Overflow上看到任何内容。

---

EDIT / CLARIFICATION 指示我向下面的堆栈溢出帖子作为可能的重复： iPhone：检测上次屏幕触摸后的用户闲置/空闲时间

但是，我相信我的问题是非常不同的。

• 我的问题：是否有 - 在Objective-C中的方法类似于 - [UIAppDelegate applicationWillResignActive：] 等。


• 其他问题：如何触发在预定时段的用户不活动之后，不管屏幕状态如何？

我可以看到其他问题如何回答我的问题if有一种方法用于获得用户在设置（1分钟，2分钟，3分钟，4分钟，5分钟或从不）下为自动锁定设置的时间长度，但我没有看到UIApplication的文档中的方法或属性。我假设一个妥协是假设屏幕在不活动1分钟后关闭，但这对我来说是不太可取的假设。

解决方案

当应用程序即将变为非活动状态时，将调用此方法（您应该立即停止此处的任何进程，如计时器等）

<$ p $当它已经变为非活动状态时，您可以使用

[UIAppDelegate applicationWillResignActive：]


<应保存任何重要数据）

   -  [UIAppDelegate applicationDidEnterBackground：] 
  pre> 
 
 
当您的应用程式遭到杀死时（全部储存，全部杀掉）
   -  [UIAppDelegate willTerminate：] 
  
 / p> 
 
 
  https://developer.apple.com/library/ios/documentation/uikit/reference/UIApplicationDelegate_Protocol/Reference/Reference.html  
 
I'd like to perform some methods before my app closes due to user inactivity (i.e., the screen going black and the phone locking when you haven't touched it for a while). What method(s) is/are called when this happens?

I'm guessing:


This method / these methods would be part of my AppDelegate class.
This method / these methods would be analogous to -[UIAppDelegate applicationWillResignActive:], -[UIAppDelegate applicationDidEnterBackground:], -[UIAppDelegate willTerminate:].


I didn't see anything in the documentation for UIApplicationDelegate and I had difficulty Googling the right terms (e.g., "method inactivity app objective c"). I also didn't see anything on Stack Overflow.



EDIT / CLARIFICATION: Multiple people have directed me towards the following Stack Overflow post as a possible duplicate: iPhone: Detecting user inactivity/idle time since last screen touch

However, I do believe my question is very different. Please let me know what I am misunderstanding if my understanding is off.


My question: Is there a built-in method in Objective-C akin to -[UIAppDelegate applicationWillResignActive:] et al. that is called or property that is changed when the screen turns black after a period of inactivity while an app is still open?
Other question: How can I trigger a method after a predetermined period of user inactivity, regardless of screen state?


I could see how the other question could answer my question if there is a method for obtaining the length of time the user has set for "Auto-Lock" under Settings (either 1 min, 2 min, 3 min, 4 min, 5 min, or Never), but I don't see such a method or property in the documentation for UIApplication. I suppose a compromise would be to assume that the screen is "off" after 1 minute of inactivity, but this to me would be a less-than-desireable assumption.
解决方案
This one is invoked when the app is about to become inactive (you shouldstop any process here like timers etc..)
[UIAppDelegate applicationWillResignActive:]
when it has already become inactive (you should save any important data here)
-[UIAppDelegate applicationDidEnterBackground:]
when your app is killed (save all , kill em all)
-[UIAppDelegate willTerminate:]
for any other info.. you can check this link

https://developer.apple.com/library/ios/documentation/uikit/reference/UIApplicationDelegate_Protocol/Reference/Reference.html

                        
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