特定于应用程序的信息:应用程序未能及时启动(iOS)？

Question

这是我的一个崩溃报告的顶部.是否有Apple确定的应用启动超时限制？任何常见的解决方法如果是的话

Elapsed total CPU time (seconds): 13.700 (user 8.580, system 5.120), 67% CPU 
Elapsed application CPU time (seconds): 6.180, 30% CPU

在iPhone 3G上.

我必须分开/延迟我的启动任务......

Answer 1

我认为它必须在5秒(或者10秒)内启动,否则iPhone会认为它已经崩溃了.

尽量避免在启动时在主线程上加载大量内容.如果你需要在后台线程上加载很多东西,比如:

- (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];
}