我是iOS编程的新手。 我不知道我的错误是什么原因。 我的代码只是在应用程序启动时加载数据库，但只要我运行它就强行关闭它。
这是我的标头文件：
//
// ViewController.h
// Manicuriousv2
//
// Created by Bonafide on 6/5/14.
// Copyright (c) 2014 Bonafide_iOSTeam. All rights reserved.
//
#import <UIKit/UIKit.h>
#import "sqlite3.h"
@interface ViewController : UIViewController <UITabBarDelegate, UITableViewDataSource>
{
sqlite3 *AppDB;
}
- (IBAction)btnAvailPop:(id)sender;
- (IBAction)btnRstPop:(id)sender;
- (NSString *) filePath;
- (void) openDB;
- (void)
createTable: (NSString *) Ref_ServType
withfield1: (NSString *) ServID
withfield2: (NSString *) ServiceTitle;
@end
实施文件：
//
// ViewController.m
// Manicuriousv2
//
// Created by Bonafide on 6/5/14.
// Copyright (c) 2014 Bonafide_iOSTeam. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)
createTable: (NSString *) Ref_ServType
withfield1: (NSString *) ServID
withfield2: (NSString *) ServiceTitle;
{
}
-(NSString *) filePath{
NSArray *paths =NSSearchPathForDirectoriesInDomains
(NSDocumentationDirectory,NSUserDomainMask, YES);
return [[paths objectAtIndex:0]
stringByAppendingPathComponent:@"ManicuriousDB.db"
];
}
-(void) openDB{
if (sqlite3_open([[self filePath] UTF8String], &AppDB) != SQLITE_OK){
sqlite3_close(AppDB);
NSAssert(0,@"Database Failed to open");
}else{
NSLog(@"Database Opened!");
}
}
- (void)viewDidLoad
{
[self openDB];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)btnAvailPop:(id)sender {
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Avail List"
message:@"Are you sure you want to avail the services you have selected?"
delegate:nil
cancelButtonTitle:@"Cancel"
otherButtonTitles:@"Avail", nil];
[alert show];
}
- (IBAction)btnRstPop:(id)sender {
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Avail List"
message:@"Are you sure you want to reset the list of services you have selected?"
delegate:nil
cancelButtonTitle:@"Cancel"
otherButtonTitles:@"Reset", nil];
[alert show];
}
@end
错误消息：
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)
答案 0 :(得分：2)
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]
第二行告诉你错误是什么：
'Database Failed to open'
问题在于你的代码的这一部分：
-(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，我会说问题是你打电话给sqlite3_open()功能。
sqlite3_open()失败的最可能失败原因是因为您使用的路径是只读的。
回顾您的代码，-filePath方法正在使用NSDocumentationDirectory，而它应该使用NSDocumentDirectory。