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使用我的应用程序,我有一个预填充的 sqlite 数据库,它是使用我创建的另一个应用程序的核心数据创建的,因此数据模型是相同的。我把它复制过来,一切都很好。我在每台可以运行 iOS 6.0 的 iOS 设备上都进行了尝试,因为这就是我正在构建的目标。即使在早期的 iPod Touches 上,该应用程序也能正常工作。数据库在旧设备上复制大约需要 45 秒。该应用程序可以运行所有数据,并且所有设备的测试都很好,没有问题。我在应用商店发布了该应用,发现在旧设备上,该应用在首次加载时崩溃。我假设这是一个与内存相关的问题。我最困惑的是,与我联系的购买它的客户拥有相同的手机和 iPhone 4S,其中一个报告它工作正常,而另一个说它崩溃了。我认为一个有早期的4S,而另一个有一个后期的4S。我确认他们在电话上也有空间复制数据。当我从 Xcode 运行应用程序时,无论设备如何,它都不会崩溃。

我的问题是有人知道为什么会发生这种情况以及可能的解决方法吗?

也许有一种更有效的方法不会使应用程序第一次加载几乎需要一分钟?任何帮助都会很棒,因为我不知所措。我查看了大约 30 个其他问题,这些问题与此类似,但它们确实没有回答我需要的问题。

我还想对你们所有人说声谢谢,因为我住在这个网站上,从你们的所有问题和答案中学到了很多。

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
    if (_persistentStoreCoordinator != nil) {
        return _persistentStoreCoordinator;
    }

    NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Data.sqlite"];

#define UPGRADE_COPY_STORE_FROM_BUNDLE

#ifdef UPGRADE_COPY_STORE_FROM_BUNDLE
    if (![[NSFileManager defaultManager] fileExistsAtPath:[storeURL path]]) {
        NSString *dataPath = [[NSBundle mainBundle]pathForResource:@"Data" ofType:@"sqlite" inDirectory:nil];
        NSError *anyError = nil;
        BOOL success = [[NSFileManager defaultManager] copyItemAtPath:dataPath toPath:[storeURL path] error:&anyError];
        if (!success) NSLog(@"Error copying file: %@", anyError);
    }
#endif


    NSError *error = nil;
    _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
    if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {

        NSLog(@"Unresolved error %@, %@", error, [error userInfo]);

    }    

    return _persistentStoreCoordinator;
}

还附上了来自设备的崩溃日志。更新

    Incident Identifier: CCFB748D-5A2A-45CE-B9EC-19811CCDC696
CrashReporter Key:   71b2c2b3b88abfe03baa87e7f588642dcec0ff08
Hardware Model:      iPod4,1
Process:         Upgrade [2513]
Path:            /var/mobile/Applications/27C440D4-0210-48BB-A287-570FAEDE3369/Upgrade.app/Upgrade
Identifier:      Upgrade
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2013-07-27 23:23:57.479 -0600
OS Version:      iOS 6.1.2 (10B146)
Report Version:  104

Exception Type:  00000020
Exception Codes: 0x000000008badf00d
Highlighted Thread:  0

Application Specific Information:
com.JonPhillips.Upgrade failed to launch in time

Elapsed total CPU time (seconds): 2.450 (user 2.450, system 0.000), 12% CPU 
Elapsed application CPU time (seconds): 0.528, 3% CPU

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0:
0   libsystem_kernel.dylib          0x39b84570 read + 8
1   libcopyfile.dylib               0x39a70df4 copyfile_internal + 4616
2   libcopyfile.dylib               0x39a72196 copyfile + 3326
3   Foundation                      0x32301cb4 -[NSFilesystemItemCopyOperation _handleFTSEntry:] + 384
4   Foundation                      0x323014a2 -[NSDirectoryTraversalOperation main] + 334
5   Foundation                      0x322af5bc -[__NSOperationInternal start] + 836
6   Foundation                      0x322fdd1e -[NSFileManager copyItemAtPath:toPath:error:] + 238
7   Upgrade                         0x0009f438 -[JPPAppDelegate persistentStoreCoordinator] (JPPAppDelegate.m:186)
8   Upgrade                         0x0009ef30 -[JPPAppDelegate managedObjectContext] (JPPAppDelegate.m:150)
9   Upgrade                         0x0009f95e -[MainScreenViewController viewDidLoad] (MainScreenViewController.m:35)
10  UIKit                           0x33849590 -[UIViewController loadViewIfRequired] + 360
11  UIKit                           0x338c3fb8 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 80
12  UIKit                           0x338c3f5e -[UITabBarController transitionFromViewController:toViewController:] + 26
13  UIKit                           0x3386e05c -[UITabBarController _setSelectedViewController:] + 292
14  UIKit                           0x3386e642 -[UITabBarController _selectDefaultViewControllerIfNecessaryWithAppearanceTransitions:] + 150
15  UIKit                           0x338c6ca2 -[UITabBarController viewWillAppear:] + 130
16  UIKit                           0x3389130c -[UIViewController _setViewAppearState:isAnimating:] + 132
17  UIKit                           0x33849e10 -[UIView(Hierarchy) _willMoveToWindow:withAncestorView:] + 504
18  UIKit                           0x3382c40e -[UIView(Internal) _addSubview:positioned:relativeTo:] + 326
19  UIKit                           0x3382c2be -[UIView(Hierarchy) addSubview:] + 26
20  UIKit                           0x33889e46 -[UIWindow addRootViewControllerViewIfPossible] + 270
21  UIKit                           0x33885ae8 -[UIWindow _setHidden:forced:] + 360
22  UIKit                           0x338c71e4 -[UIWindow makeKeyAndVisible] + 56
23  Upgrade                         0x0009e896 -[JPPAppDelegate initializeStoryBoardBasedOnScreenSize] (JPPAppDelegate.m:64)
24  Upgrade                         0x0009e106 -[JPPAppDelegate application:didFinishLaunchingWithOptions:] (JPPAppDelegate.m:22)
25  UIKit                           0x3388aad4 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 248
26  UIKit                           0x3388a65e -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1186
27  UIKit                           0x33882846 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 694
28  UIKit                           0x3382ac34 -[UIApplication handleEvent:withNewEvent:] + 1000
29  UIKit                           0x3382a6c8 -[UIApplication sendEvent:] + 68
30  UIKit                           0x3382a116 _UIApplicationHandleEvent + 6150
31  GraphicsServices                0x3551a5a0 _PurpleEventCallback + 588
32  GraphicsServices                0x3551a1ce PurpleEventCallback + 30
33  CoreFoundation                  0x319f7170 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32
34  CoreFoundation                  0x319f7112 __CFRunLoopDoSource1 + 134
35  CoreFoundation                  0x319f5f94 __CFRunLoopRun + 1380
36  CoreFoundation                  0x31968eb8 CFRunLoopRunSpecific + 352
37  CoreFoundation                  0x31968d44 CFRunLoopRunInMode + 100
38  UIKit                           0x33881480 -[UIApplication _run] + 664
39  UIKit                           0x3387e2fc UIApplicationMain + 1116
40  Upgrade                         0x0009e0b8 main (main.m:16)
41  libdyld.dylib                   0x39accb1c start + 0

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib          0x39b83648 kevent64 + 24
1   libdispatch.dylib               0x39abc4ec _dispatch_mgr_invoke + 792
2   libdispatch.dylib               0x39aaedf4 _dispatch_mgr_thread$VARIANT$up + 32

Thread 2 name:  WebThread
Thread 2:
0   libsystem_kernel.dylib          0x39b82eb4 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x39b83048 mach_msg + 36
2   CoreFoundation                  0x319f7040 __CFRunLoopServiceMachPort + 124
3   CoreFoundation                  0x319f5d9e __CFRunLoopRun + 878
4   CoreFoundation                  0x31968eb8 CFRunLoopRunSpecific + 352
5   CoreFoundation                  0x31968d44 CFRunLoopRunInMode + 100
6   WebCore                         0x3794c500 RunWebThread(void*) + 440
7   libsystem_c.dylib               0x39aec30e _pthread_start + 306
8   libsystem_c.dylib               0x39aec1d4 thread_start + 4

Unknown thread crashed with unknown flavor: 5, state_count: 1
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1 回答 1

2

您正在主线程上复制数据,这会阻塞太长时间。它永远不应该被阻止 1 秒或更长时间。否则 iOS 看门狗会杀死你的进程。

具体的崩溃报告显示该应用程序已被杀死,因为启动时间太长:com.JonPhillips.Upgrade failed to launch in time.

复制动作甚至是从内部运行的applicationDidFinishLaunching。结束此方法的看门狗定时器甚至更短!如果您对 WWDC 会议感兴趣,请查看确切的时间安排。我不记得具体是在哪个地方提到的。

如果您需要此类任务,请将它们移至后台线程。如果此任务意味着用户无法在应用程序中执行任何操作,请显示一个特定的 UI,告诉用户正在发生的事情并给出一些指示需要多长时间,例如进度条和/或一些文本“第 1 步,共 3 步:复制数据”。

于 2013-07-28T11:57:47.060 回答