iOS:由于崩溃而退出应用程序时，是否有任何委托方法 [英] iOS: Is there any delegate method when the app quits due to any crash

问题描述

当我的应用由于内存不足，内存泄漏等一般崩溃而崩溃时退出时，我想与服务器进行一些交互.我想知道，在这种情况下是否会调用任何委托方法，这样我就可以在应用程序由于任何崩溃而退出之前迅速并立即与我的服务器联系.

I would like to do some interaction with my server when my app quits at the time of crash due to low memory, memory leaks etc. general crashes. I would like to know, Is there any delegate methods will be called in this scenario, so that i can contact my server quickly and immediately before the app quits due to any crash.

谢谢.

推荐答案

正如您所解释的，您需要封闭服务器，可以在应用由于任何崩溃而退出之前立即与服务器联系.

As you explained you need to intimate server you can contact your server immediately before the app quits due to any crash.

在这种情况下，您应该设置exception handler，因为任何exception都会发生，您将得到通知

in that case you should set exception handler as any exception will occur you will get notify

看看你怎么做

在applicationDidFixnishLaunchin类的方法applicationDidFixnishLaunchin中写这行代码NSSetUncaughtExceptionHandler (&uncaughtExceptionHandler)

write this NSSetUncaughtExceptionHandler (&uncaughtExceptionHandler) line of code in applicationDidFixnishLaunchin Method of Appdelegate Class

 -(BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:  
  (NSDictionary*)launchOptions
 {   
    NSSetUncaughtExceptionHandler(&uncaughtExceptionHandler); 

   EDIT:
   if( [[NSUserDefaults standardUserDefaults] boolForKey:@"isExceptionOccured"])
   {
    //call sever code here
    [[NSUserDefaults standardUserDefaults] setBool:FALSE forKey:@"isExceptionOccured"];
   }
   //rest of your code
 }


 void uncaughtExceptionHandler(NSException *exception)
  {


  NSLog(@"Exception Got %@",[exception description]);
  //do what ever you what here 
  //can save any `bool` so that as aaplication  run on immediate next launching of crash
  //could intimate any thing

  EDIT: 

  [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"isExceptionOccured"];

  }

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