我们从iTunes connect收到崩溃日志，这有点奇怪。
以前，我们的应用存在问题，需要很长时间才能从ApplicationDidFinishLaunching返回。这是由于在applicationDidFinishLaunching内部执行过多工作所导致的，我们在较慢的设备上超过了20秒的超时时间。
为了解决这个问题，我们将所有设置代码从ApplicationDidFinishLaunching中移出，并将其移到了特殊的secondaryLoadingController中。最重要的是，我们将该 Controller 内部的设置代码移到了单独的线程中。
但是，我们仍然看到崩溃日志，即使崩溃日志显示了对[UIApplication _reportAppLaunchFinished]的调用，我们的应用也未能及时启动。对我来说，这表明该应用已完成启动，只要我们想运行安装代码，我们就应该有空。以下是崩溃日志。
谢谢你尽你所能的帮助。
Incident Identifier: 429360D5-6B02-49BE-9A0F-164DC521BE36
Hardware Model: iPod2,1
Process: XYZ [357]
Path: /var/mobile/Applications/D5038F26-CC5B-48E5-824E-090163B5C0C4/XYZ.app/XYZ
Identifier: XYZ
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2010-09-28 13:35:25.138 -0700
OS Version: iPhone OS 4.0 (8A293)
Report Version: 104
Exception Type: 00000020
Exception Codes: 0x8badf00d
Highlighted Thread: 0
Application Specific Information:
com.xyz.xyz failed to launch in time
elapsed total CPU time (seconds): 20.180 (user 15.910, system 4.270), 100% CPU
elapsed application CPU time (seconds): 10.960, 54% CPU
Thread 0:
0 libobjc.A.dylib 0x3523a50c objc_msgSend + 44
1 CoreFoundation 0x363bf568 -[__NSArrayM addObject:]
2 XYZ 0x0000a152 -[Database fetchDrinks:] + 290
3 XYZ 0x0000677c -[Database getAllDrinks] + 136
4 XYZ 0x0003a164 -[SecondaryLoadingViewController viewDidLoad] + 208
5 UIKit 0x323e582c -[UIViewController view]
6 UIKit 0x323f9628 -[UIViewController viewControllerForRotation]
7 UIKit 0x323f9574 -[UIViewController _visibleView]
8 UIKit 0x323f94fc -[UIViewController rotatingContentViewForWindow:]
9 UIKit 0x3249a514 -[UIClientRotationContext initWithClient:toOrientation:duration:andWindow:]
10 UIKit 0x32499314 -[UIWindow _setRotatableClient:toOrientation:duration:force:]
11 UIKit 0x32497d78 -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:]
12 UIKit 0x32497534 -[UIViewController presentModalViewController:withTransition:]
13 UIKit 0x324977fc -[UIViewController _tryRecursivelyPresentModalViewController:withTransition:]
14 UIKit 0x324977c0 -[UIViewController _tryRecursivelyPresentModalViewController:withTransition:]
15 UIKit 0x32496e00 -[UIViewController presentModalViewController:withTransition:]
16 UIKit 0x3249699c -[UIViewController presentModalViewController:animated:]
17 XYZ 0x000044a2 -[HomeViewController viewDidLoad] + 82
18 UIKit 0x323e582c -[UIViewController view]
19 UIKit 0x323fd68c -[UIViewController contentScrollView]
20 UIKit 0x323fd4ac -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:]
21 UIKit 0x323fd358 -[UINavigationController _layoutViewController:]
22 UIKit 0x323fccb8 -[UINavigationController _startTransition:fromViewController:toViewController:]
23 UIKit 0x323fca1c -[UINavigationController _startDeferredTransitionIfNeeded]
24 UIKit 0x323fc90c -[UINavigationController viewWillLayoutSubviews]
25 UIKit 0x323fc43c -[UILayoutContainerView layoutSubviews]
26 UIKit 0x32370ab0 -[UIView(CALayerDelegate) _layoutSublayersOfLayer:]
27 CoreFoundation 0x363c85ba -[NSObject(NSObject) performSelector:withObject:]
28 QuartzCore 0x30c8c61c 0x30c82000 + 42524
29 QuartzCore 0x30c8c2a4 0x30c82000 + 41636
30 QuartzCore 0x30c8bbb0 0x30c82000 + 39856
31 QuartzCore 0x30c8b7d8 0x30c82000 + 38872
32 QuartzCore 0x30c8b684 0x30c82000 + 38532
33 UIKit 0x323d99d4 -[UIApplication _reportAppLaunchFinished]
34 UIKit 0x3251d77c -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:]
35 UIKit 0x323d87b8 -[UIApplication handleEvent:withNewEvent:]
36 UIKit 0x323d7eb4 -[UIApplication sendEvent:]
37 UIKit 0x323d77e8 _UIApplicationHandleEvent
38 GraphicsServices 0x33c4dedc PurpleEventCallback
39 CoreFoundation 0x364142ac __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__
40 CoreFoundation 0x364161d6 __CFRunLoopDoSource1
41 CoreFoundation 0x3641718e __CFRunLoopRun
42 CoreFoundation 0x363be0bc CFRunLoopRunSpecific
43 CoreFoundation 0x363bdfca CFRunLoopRunInMode
44 UIKit 0x32363b18 -[UIApplication _run]
45 UIKit 0x32361fb8 UIApplicationMain
46 XYZ 0x00002b20 main + 36
47 XYZ 0x00002af0 start + 32
更新
我试图在单独的线程上运行耗时的导入代码(仅在应用程序更新上发生)。我什至使用带有嵌入式进度条的AlertView来更新GUI，以便用户知道某些事情仍在发生。在我们的测试过程中，这很好。以下是似乎无效的线程代码。崩溃日志似乎表明所有工作都在主线程上完成。
if ([database appDidUpdate] == YES) {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
dbImportThread = [[NSThread alloc] initWithTarget:self selector:@selector(import) object:nil];
[dbImportThread start];
[pool release];
- (void)import {
//do importing work and update the gui with the progress
}
最佳答案
您仍然阻塞主线程的时间太长-无论是在启动期间还是在以后。轻量级GUI仅在主线程上工作。如果您在第二个线程上执行工作，但在主线程中等待结果，则主线程也会被阻塞。
乐器是您的 friend 。
关于iPhone应用程序启动时崩溃，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/4318302/