应用程序特定信息应用程序未能和时启动iOS

我认为它必须在5秒（或者10秒）内启动，否则iPhone会认为它已经崩溃。

I think it has to launch within 5 (or maybe 10) seconds or the iPhone assumes it has crashed.

尽量避免加载很多东西你的主要线程在发布时。如果你需要在后台线程上加载很多东西，比如：

Try to avoid loading a lot of stuff on your main thread at launch. If you need to load a lot of stuff do it on a background thread, like this:

- (void)startLoading
{
    //call this in your app delegate instead of setting window.rootViewController to your main view controller
    //you can show a UIActivityIndiocatorView here or something if you like

    [self performSelectorInBackground:@selector(loadInBackground)];
}

- (void)loadInBackground
{
    //do your loading here
    //this is in the background, so don't try to access any UI elements

    [self performSelectorOnMainThread:@selector(finishedLoading) withObject:nil waituntilDone:NO];
}

- (void)finishedLoading
{
    //back on the main thread now, it's safe to show your view controller
    window.rootViewController = viewController;
    [window makeKeyAndVisible];
}

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