blocks|key|1456505|text|你试过exit(0)吗？|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1456506|或者，[[NSThread+mainThread]+exit]，尽管我没有尝试过，但它似乎是更合适的解决方案。|1456507|entityMap^0|3|7|0|3|S|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

Have you tried <code>exit(0)</code>?

Alternatively, <code>[[NSThread mainThread] exit]</code>, although I have not tried that it seems like the more appropriate solution.

blocks|key|1671544|text|除了以上这些，很好的答案我只是想补充一下，想想清理你的记忆。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1671545|应用程序退出后，iPhone+OS将自动清除应用程序留下的任何内容，因此手动释放所有内存只会增加应用程序退出所需的时间。|1671546|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

In addition to the above, good, answer I just wanted to add, think about cleaning up your memory.

After your application exits, the iPhone OS will automatically clean up anything your application left behind, so freeing all memory manually can just increase the amount of time it takes your application to exit.

blocks|key|1456618|text|在iPhone上，没有退出应用程序的概念。唯一应该导致应用程序退出的操作是触摸手机上的Home按钮，而这不是开发人员可以访问的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1456619|根据苹果公司的说法，你的应用程序不应该自行终止。由于用户没有点击Home按钮，因此任何返回到Home屏幕的操作都会给用户一种应用程序崩溃的印象。这是令人困惑的、非标准的行为，应该避免。|1456620|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

On the iPhone there is no concept of quitting an app. The only action that should cause an app to quit is touching the Home button on the phone, and that's not something developers have access to.

According to Apple, your app should not terminate on its own. Since the user did not hit the Home button, any return to the Home screen gives the user the impression that your app crashed. This is confusing, non-standard behavior and should be avoided.

blocks|key|1671625|text|嗯，如果你的应用程序需要互联网连接，你可能“不得不”退出应用程序。您可以显示一个警告，然后执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1671626|if+([[UIApplication+sharedApplication]+respondsToSelector:@selector(terminate)])+{
++++[[UIApplication+sharedApplication]+performSelector:@selector(terminate)];
}+else+{
++++kill(getpid(),+SIGINT);+
}|code-block|syntax|javascript|1671627|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Hm, you may 'have to' quit the application if, say, your application requires an internet connection. You could display an alert and then do something like this:

<pre><code>if ([[UIApplication sharedApplication] respondsToSelector:@selector(terminate)]) {
 [[UIApplication sharedApplication] performSelector:@selector(terminate)];
} else {
 kill(getpid(), SIGINT); 
}
</code></pre>

blocks|key|1671673|text|这不是一种退出程序的方式，而是一种迫使人们退出的方式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1671674|UIAlertView+*anAlert+=+[[UIAlertView+alloc]+initWithTitle:@"Hit+Home+Button+to+Exit"+message:@"Tell+em+why+they're+quiting"+delegate:self+cancelButtonTitle:nil+otherButtonTitles:nil];
[anAlert+show];|code-block|syntax|javascript|1671675|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Its not really a way to quit the program, but a way to force people to quit.

<pre><code>UIAlertView *anAlert = [[UIAlertView alloc] initWithTitle:@"Hit Home Button to Exit" message:@"Tell em why they're quiting" delegate:self cancelButtonTitle:nil otherButtonTitles:nil];
[anAlert show];
</code></pre>

blocks|key|1671726|text|[[UIApplication+sharedApplication]+terminateWithSuccess];|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1671727|它工作得很好，自动调用|unstyled|1671728|-+(void)applicationWillTerminateUIApplication+*)application+delegate.|1671729|要删除编译时警告，请添加以下代码|1671730|@interface+UIApplication(MyExtras)
++-+(void)terminateWithSuccess;
@end+|1671731|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>[[UIApplication sharedApplication] terminateWithSuccess];
</code></pre>

It worked fine and automatically calls 

<pre><code>- (void)applicationWillTerminateUIApplication *)application delegate.
</code></pre>

to remove compile time warning add this code

<pre><code>@interface UIApplication(MyExtras)
 - (void)terminateWithSuccess;
@end 
</code></pre>

blocks|key|1671808|text|我的应用程序最近被拒绝了bc我使用了一种未记录的方法。字面意思：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1671809|“不幸的是，它无法添加到应用程序商店，因为它正在使用私有API。禁止使用非公共API，如iPhone开发者程序许可协议3.3.1节中所述：|1671810|"3.3.1应用程序只能以Apple规定的方式使用记录的API，不得使用或调用任何私有API。“|1671811|应用程序中包含的非公共API是terminateWithSuccess“|1671812|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

My App has been rejected recently bc I've used an undocumented method. Literally:

"Unfortunately it cannot be added to the App Store because it is using a private API. Use of non-public APIs, which as outlined in the iPhone Developer Program License Agreement section 3.3.1 is prohibited:

"3.3.1 Applications may only use Documented APIs in the manner prescribed by Apple and must not use or call any private APIs."

The non-public API that is included in your application is terminateWithSuccess"

blocks|key|1671876|text|当用户故意退出时，您的ApplicationDelegate会收到通知：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1671877|-+(void)applicationWillResignActive:(UIApplication+*)application+{|code-block|syntax|javascript|1671878|当我收到此通知时，我只需调用|1671879|++++++++exit(0);|1671880|它完成了所有的工作。最好的事情是，这是用户的退出意图，这就是为什么在那里调用它应该不是问题。|1671881|在我的Audio-App上，当音乐还在播放时，当人们同步他们的设备时，有必要退出应用程序。一旦同步完成，我就会收到通知。但在此之后立即退出应用程序实际上看起来就像崩溃一样。|1671882|因此，我设置了一个标志，以便在下一次背景操作时真正退出应用程序。这对于在同步后刷新应用程序是可以的。|1671883|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Your ApplicationDelegate gets notified of intentional quitting by the user:

<pre><code>- (void)applicationWillResignActive:(UIApplication *)application {
</code></pre>

When I get this notification I just call

<pre><code> exit(0);
</code></pre>

Which does all the work. And the best thing is, it is the useres intent to quit, which is why this should not be a problem calling it there.

On my Audio-App it was necessary to quit the app after people were syncing their device while the music was still playing. As soon as the syncing is complete I get a notification. But quitting the app right after that would actually look like a crash.

So instead I set a flag to REALLY quit the app on the next backgrounding action. Which is okay for refreshing the app after a sync.

blocks|key|1456917|text|转到您的info.plist并检查密钥“应用程序不在后台运行”。这一次，当用户单击home按钮时，应用程序将完全退出。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1456918|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Go to your info.plist and check the key "Application does not run in background". This time when the user clicks the home button, the application exits completely.

blocks|key|1671965|text|将application-info.plist上的UIApplicationExitsOnSuspend属性添加到true。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1671966|entityMap^0|1|M|P|R|1L|4|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

Add <code>UIApplicationExitsOnSuspend</code> property on <code>application-info.plist</code> to <code>true</code>.

blocks|key|1672122|text|苹果说：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1672123|警告:请勿调用exit函数。调用exit的应用程序将对用户显示为已崩溃，而不是执行正常终止并返回到主屏幕。|1672124|我认为这是一个糟糕的假设。如果用户点击退出按钮，并出现类似于“应用程序现在将退出”之类的消息，则它看起来并未崩溃。Apple应该提供一种有效的退出应用程序的方法(而不是退出(0))。|1672125|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Apple say:

"Warning: Do not call the exit function. Applications calling exit will appear to the user to have crashed, rather than performing a graceful termination and animating back to the Home screen."

I think that this is a bad assumption. If the user tap a quit button and a message appears that say something like: "The application will now quit.", it doesn't appear to be crashed. Apple should provide a valid way to quit an application (not exit(0)).

blocks|key|1457147|text|当崩溃时，退出(0)出现在用户面前，因此向用户显示一条确认消息。确认后，暂停(以编程方式按下主页按钮)并等待2秒，同时应用程序将进入后台动画，然后在用户视图后面退出|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1457148|-(IBAction)doExit
{
++++//show+confirmation+message+to+user
++++UIAlertView*+alert+=+[[UIAlertView+alloc]+initWithTitle:@"Confirmation"
+++++++++++++++++++++++++++++++++++++++++++++++++message:@"Do+you+want+to+exit?"
++++++++++++++++++++++++++++++++++++++++++++++++delegate:self
+++++++++++++++++++++++++++++++++++++++cancelButtonTitle:@"Cancel"
+++++++++++++++++++++++++++++++++++++++otherButtonTitles:@"OK",+nil];
++++[alert+show];
}

-(void)alertView:(UIAlertView+*)alertView+clickedButtonAtIndex:(NSInteger)buttonIndex
{
++++if+(buttonIndex+!=+0)++//+0+==+the+cancel+button
++++{
++++++++//home+button+press+programmatically
++++++++UIApplication+*app+=+[UIApplication+sharedApplication];
++++++++[app+performSelector:@selector(suspend)];

++++++++//wait+2+seconds+while+app+is+going+background
++++++++[NSThread+sleepForTimeInterval:2.0];

++++++++//exit+app+when+app+is+in+background
++++++++exit(0);
++++}
}|code-block|syntax|javascript|1457149|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

exit(0) appears to a user as crashes, so show a confirmation message to user. After confirmation suspend(home button press programmatically) and wait 2 seconds while app is going background with animation then exit behind user's view

<pre><code>-(IBAction)doExit
{
 //show confirmation message to user
 UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Confirmation"
 message:@"Do you want to exit?"
 delegate:self
 cancelButtonTitle:@"Cancel"
 otherButtonTitles:@"OK", nil];
 [alert show];
}

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
 if (buttonIndex != 0) // 0 == the cancel button
 {
 //home button press programmatically
 UIApplication *app = [UIApplication sharedApplication];
 [app performSelector:@selector(suspend)];

 //wait 2 seconds while app is going background
 [NSThread sleepForTimeInterval:2.0];

 //exit app when app is in background
 exit(0);
 }
}
</code></pre>

blocks|key|1457169|text|-+(IBAction)logOutButton:(id)sender
{
+++//show+confirmation+message+to+user
+++CustomAlert*+alert+=+[[CustomAlert+alloc]+initWithTitle:@"Confirmation"+message:@"Do+you+want++to+exit?"+delegate:self+cancelButtonTitle:@"Cancel"+otherButtonTitles:@"OK",+nil];
+++alert.style+=+AlertStyleWhite;
+++[alert+setFontName:@"Helvetica"+fontColor:[UIColor+blackColor]+fontShadowColor:[UIColor+clearColor]];
+++[alert+show];
}
-+(void)alertView:(UIAlertView+*)alertView+clickedButtonAtIndex:(NSInteger)buttonIndex
{

+++if+(buttonIndex+!=+0)++//+0+==+the+cancel+button
+++{
++++++//home+button+press+programmatically
++++++UIApplication+*app+=+[UIApplication+sharedApplication];
++++++[app+performSelector:@selector(suspend)];
++++++//wait+2+seconds+while+app+is+going+background
++++++[NSThread+sleepForTimeInterval:2.0];
++++++//exit+app+when+app+is+in+background
++++++NSLog(@"exit(0)");
++++++exit(0);
++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1457170|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>- (IBAction)logOutButton:(id)sender
{
 //show confirmation message to user
 CustomAlert* alert = [[CustomAlert alloc] initWithTitle:@"Confirmation" message:@"Do you want to exit?" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
 alert.style = AlertStyleWhite;
 [alert setFontName:@"Helvetica" fontColor:[UIColor blackColor] fontShadowColor:[UIColor clearColor]];
 [alert show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

 if (buttonIndex != 0) // 0 == the cancel button
 {
 //home button press programmatically
 UIApplication *app = [UIApplication sharedApplication];
 [app performSelector:@selector(suspend)];
 //wait 2 seconds while app is going background
 [NSThread sleepForTimeInterval:2.0];
 //exit app when app is in background
 NSLog(@"exit(0)");
 exit(0);
 }
}
</code></pre>

blocks|key|1457232|text|用户应该决定应用程序何时退出。我认为当一个应用程序退出时，这不是一个好的用户交互。因此，它没有很好的API，只有home按钮有一个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1457233|如果有错误:更好地实现它或通知用户。如果必须重新启动:最好是通知用户。|1457234|这听起来很愚蠢，但在不让用户决定也不通知他的情况下退出应用程序是不好的做法。苹果表示，既然有一个主页按钮用于用户交互，那么同一功能(退出应用程序)就不应该有两个东西。|1457235|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

The user should decide when an app exits.
I don't think it is a good user interaction when an app quits. Therefore there is no nice API for it, only the home button has one.

If there is an error: Implement it better or Notify the user.
If there have to be a restart: Implement it better of Notify the user.

It sounds dumb, but it's bad practice to exit the app without letting the user decide and not notifying him. And since there is a home button for the user interaction, Apple states, there should not be 2 things for the same function (exiting an app).

blocks|key|1672397|text|我使用了上面提到的[NSMutableArray+new+addObject:nil]方法来强制退出(崩溃)应用程序，而不进行告诉人的exit(0)函数调用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1672398|为什么？因为我的应用程序在所有网络API调用上都使用证书锁定，以防止中间人攻击。其中包括我的金融应用程序在启动时进行的初始化调用。|1672399|如果证书身份验证失败，我的所有初始化调用都会出错，并使我的应用程序处于不确定状态。让用户回家然后再回到应用程序中是没有帮助的，因为除非应用程序已经被操作系统清除，否则它仍然是未初始化和不可信任的。|1672400|因此，在这种情况下，我们认为最好弹出一个警告，通知用户应用程序正在不安全的环境中运行，然后，当他们点击“关闭”时，使用上述方法强制退出应用程序。|1672401|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I used the [[NSMutableArray new] addObject:nil] approach mentioned above to force-quit (crash) the app without making a tell-tale exit(0) function call.

Why? Because my app uses certificate pinning on all network API calls to prevent man-in-the-middle attacks. These include the initialization calls my financial app makes on startup. 

If certificate authentication fails, all of my initialization calls error out and leave my app in an indeterminate state. Letting the user go home and then back into the app doesn't help, as unless the app has been purged by the OS it's still uninitialized and untrustworthy. 

So, in this one case, we deemed it best to pop an alert informing the user that the app is operating in an insecure environment and then, when they hit "Close", force quit the app using the aforementioned method.

blocks|key|1672440|text|Swift+4.2+(或更早版本)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1672441|可以使用名为Darvin的库。|offset|length|style|CODE|1672442|import+Darwin

exit(0)+//+Here+you+go|code-block|syntax|javascript|1672443|注意:在iOS应用程序中不建议这样做。|1672444|这样做会让你得到崩溃日志。|1672445|entityMap^0|0|6|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

<h2>Swift 4.2 (or older)</h2>

Library called <code>Darvin</code> can be used.

<pre><code>import Darwin

exit(0) // Here you go
</code></pre>

NB: This is not recomanded in iOS applications. 

Doing this will get you crash log.

blocks|key|1672467|text|你不应该直接调用函数exit(0)，因为它会立即退出应用程序，看起来你的应用程序已经崩溃了。所以最好向用户显示一个确认警告，让他们自己来做。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1672468|Swift+4.2|1672469|func+askForQuit(_+completion:@escaping+(_+canQuit:+Bool)+->+Void)+{
++++let+alert+=+UIAlertController(title:+"Confirmation!",+message:+"Do+you+want+to+quit+the+application",+preferredStyle:+.alert)
++++alert.addAction(UIAlertAction(title:+"Yes",+style:+UIAlertAction.Style.default,+handler:+{+(action)+in
++++++++alert.dismiss(animated:+true,+completion:+nil)
++++++++completion(true)
++++}))
++++alert.addAction(UIAlertAction(title:+"No",+style:+UIAlertAction.Style.cancel,+handler:+{+(action)+in
++++++++alert.dismiss(animated:+true,+completion:+nil)
++++++++completion(false)
++++}))
++++self.present(alert,+animated:+true,+completion:+nil)
}

///+Will+quit+the+application+with+animation
func+quit()+{
++++UIApplication.shared.perform(#selector(NSXPCConnection.suspend))
++++///+Sleep+for+a+while+to+let+the+app+goes+in+background
++++sleep(2)
++++exit(0)
}|code-block|syntax|javascript|1672470|用法：|1672471|self.askForQuit+{+(canQuit)+in
+++++if+canQuit+{
+++++++++self.quit()
+++++}
}|1672472|entityMap^0|A|7|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|Y|8|@]|D|@]|E|$K|L]]|$1|Q|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|R|$]]

You should not directly call the function <code>exit(0)</code> as it will quit the application immediately and will look like your app is crashed. So better to show users a confirmation alert and let them do this themselves. 

<h2>Swift 4.2</h2>

<pre><code>func askForQuit(_ completion:@escaping (_ canQuit: Bool) -&gt; Void) {
 let alert = UIAlertController(title: "Confirmation!", message: "Do you want to quit the application", preferredStyle: .alert)
 alert.addAction(UIAlertAction(title: "Yes", style: UIAlertAction.Style.default, handler: { (action) in
 alert.dismiss(animated: true, completion: nil)
 completion(true)
 }))
 alert.addAction(UIAlertAction(title: "No", style: UIAlertAction.Style.cancel, handler: { (action) in
 alert.dismiss(animated: true, completion: nil)
 completion(false)
 }))
 self.present(alert, animated: true, completion: nil)
}

/// Will quit the application with animation
func quit() {
 UIApplication.shared.perform(#selector(NSXPCConnection.suspend))
 /// Sleep for a while to let the app goes in background
 sleep(2)
 exit(0)
}
</code></pre>

<h3>Usage:</h3>

<pre><code>self.askForQuit { (canQuit) in
 if canQuit {
 self.quit()
 }
}
</code></pre>

I am programming an iPhone app, and I need to force it to exit due to certain user actions. After cleaning up memory the app allocated, what's the appropriate method to call to terminate the application?

Proper way to exit iPhone application?

身份验证

Swift

我正在编写一个iPhone应用程序，由于某些用户操作，我需要强制它退出。清理应用程序分配的内存后，应该调用什么方法来终止应用程序？

问退出iPhone应用程序的正确方式？
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