iphone voip应用程序退出代码

Question

我正在实施一个voip应用程序，但我在autorestart中遇到了一个小问题： - 打开设备时，应用程序会自动启动 但： - 用户从底栏中杀死应用程序后，应用程序不会重新启动。

我做错了什么，或者有没有办法强迫它自动重启？或者也许是一种设置退出代码的方法？

感谢。

'代码'

[window addSubview:mainViewController.view];
[window makeKeyAndVisible];
g_mainApp = self;
_site = false;

[StoreManager sharedManager];

[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(handlePayment:) name: kProductFetchedNotification object: nil];
[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(handlePayment:) name: kInAppPurchaseManagerBuyNotification object: nil];
[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(handlePayment:) name: kInAppPurchaseManagerTransactionFailedNotification object: nil];
[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(handlePayment:) name: kInAppPurchaseManagerTransactionSucceededNotification object: nil];
[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(handlePayment:) name: kInAppPurchaseManagerTransactionCanceledNotification object: nil];



[mainViewController FirstInit];
int cnt = 0;
while (cnt < 140)
{
    if ([mainViewController GetConnex] != 0)
        break;
    [mainViewController Update];

    [NSThread sleepForTimeInterval:0.1];
    cnt++;
}


return YES;