Ios sqlite3_打开-“数据库打开失败”

我对iOS编程还不熟悉。 我不知道我犯错误的原因是什么。 我的代码只是在应用程序启动时加载数据库，但每当我运行它时，它就会强制关闭自己

这是我的头文件：

错误消息：

---

查看您发布的异常消息：

2014-06-06 16:43:28.590 Manicuriousv2[2261:60b] *** Assertion failure in -[ViewController openDB], /Users/jennifer/Desktop/Manicuriousv2/Manicuriousv2/ViewController.m:38
2014-06-06 16:43:28.593 Manicuriousv2[2261:60b] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Database Failed to open'

*第一次抛出调用堆栈：

第一行告诉您问题出在哪里：

-[ViewController openDB]

第二行告诉您错误是什么：

“无法打开数据库”

因此，问题在于代码的这一部分：

-(void) openDB{
    if (sqlite3_open([[self filePath] UTF8String], &AppDB) != SQLITE_OK){
        sqlite3_close(AppDB);
        NSAssert(0,@"Database Failed to open");
    }else{

        NSLog(@"Database Opened!");
    }
}

根据一个有根据的猜测，我认为问题在于调用sqlite3_open函数的时候

sqlite3_open失败的最可能原因是您使用的路径是只读的

---

回顾您的代码，-filePath方法使用的是NSDocumentDirectory，而它可能应该使用的是NSDocumentDirectory。

发布完整的错误消息。我已经添加了错误消息。谢谢，它现在可以工作了。错误出现在NSDocumentDirectory中，就像您所说的应该是NSDocumentDirectory一样。

2014-06-06 16:43:28.502 Manicuriousv2[2261:60b] Cannot find executable for CFBundle 0x99341f0 </Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/System/Library/AccessibilityBundles/CertUIFramework.axbundle> (not loaded)
2014-06-06 16:43:28.590 Manicuriousv2[2261:60b] *** Assertion failure in -[ViewController openDB], /Users/jennifer/Desktop/Manicuriousv2/Manicuriousv2/ViewController.m:38
2014-06-06 16:43:28.593 Manicuriousv2[2261:60b] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Database Failed to open'
*** First throw call stack:
(
    0   CoreFoundation                      0x018d61e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x016558e5 objc_exception_throw + 44
    2   CoreFoundation                      0x018d6048 +[NSException raise:format:arguments:] + 136
    3   Foundation                          0x012354de -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 116
    4   Manicuriousv2                       0x00002293 -[ViewController openDB] + 339
    5   Manicuriousv2                       0x00002307 -[ViewController viewDidLoad] + 55
    6   UIKit                               0x0043433d -[UIViewController loadViewIfRequired] + 696
    7   UIKit                               0x004345d9 -[UIViewController view] + 35
    8   UIKit                               0x0045f509 -[UINavigationController rotatingSnapshotViewForWindow:] + 52
    9   UIKit                               0x007a6e3c -[UIClientRotationContext initWithClient:toOrientation:duration:andWindow:] + 420
    10  UIKit                               0x0035bc22 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:isRotating:] + 1495
    11  UIKit                               0x0035b646 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:] + 82
    12  UIKit                               0x0035b518 -[UIWindow _setRotatableViewOrientation:updateStatusBar:duration:force:] + 117
    13  UIKit                               0x0035b5a0 -[UIWindow _setRotatableViewOrientation:duration:force:] + 67
    14  UIKit                               0x0035a63a __57-[UIWindow _updateToInterfaceOrientation:duration:force:]_block_invoke + 120
    15  UIKit                               0x0035a59c -[UIWindow _updateToInterfaceOrientation:duration:force:] + 400
    16  UIKit                               0x0035b2f3 -[UIWindow setAutorotates:forceUpdateInterfaceOrientation:] + 870
    17  UIKit                               0x0035e8e6 -[UIWindow setDelegate:] + 449
    18  UIKit                               0x00438b77 -[UIViewController _tryBecomeRootViewControllerInWindow:] + 180
    19  UIKit                               0x00354474 -[UIWindow addRootViewControllerViewIfPossible] + 591
    20  UIKit                               0x003545ef -[UIWindow _setHidden:forced:] + 312
    21  UIKit                               0x0035486b -[UIWindow _orderFrontWithoutMakingKey] + 49
    22  UIKit                               0x0dcda587 -[UIWindowAccessibility(SafeCategory) _orderFrontWithoutMakingKey] + 77
    23  UIKit                               0x0035f3c8 -[UIWindow makeKeyAndVisible] + 65
    24  UIKit                               0x0030fbc0 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 2097
    25  UIKit                               0x00314667 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824
    26  UIKit                               0x00328f92 -[UIApplication handleEvent:withNewEvent:] + 3517
    27  UIKit                               0x00329555 -[UIApplication sendEvent:] + 85
    28  UIKit                               0x00316250 _UIApplicationHandleEvent + 683
    29  GraphicsServices                    0x038cbf02 _PurpleEventCallback + 776
    30  GraphicsServices                    0x038cba0d PurpleEventCallback + 46
    31  CoreFoundation                      0x01851ca5 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
    32  CoreFoundation                      0x018519db __CFRunLoopDoSource1 + 523
    33  CoreFoundation                      0x0187c68c __CFRunLoopRun + 2156
    34  CoreFoundation                      0x0187b9d3 CFRunLoopRunSpecific + 467
    35  CoreFoundation                      0x0187b7eb CFRunLoopRunInMode + 123
    36  UIKit                               0x00313d9c -[UIApplication _run] + 840
    37  UIKit                               0x00315f9b UIApplicationMain + 1225
    38  Manicuriousv2                       0x0000296d main + 141
    39  libdyld.dylib                       0x01e1f701 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) 

2014-06-06 16:43:28.590 Manicuriousv2[2261:60b] *** Assertion failure in -[ViewController openDB], /Users/jennifer/Desktop/Manicuriousv2/Manicuriousv2/ViewController.m:38
2014-06-06 16:43:28.593 Manicuriousv2[2261:60b] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Database Failed to open'

-(void) openDB{
    if (sqlite3_open([[self filePath] UTF8String], &AppDB) != SQLITE_OK){
        sqlite3_close(AppDB);
        NSAssert(0,@"Database Failed to open");
    }else{

        NSLog(@"Database Opened!");
    }
}