数据库未加载到设备上

Question

我为Ipad制作了一个应用程序，它在simultor上工作正常但是当它安装在设备上进行测试时，数据库没有加载该值。

我正在为ios 4.3目标开发，我将sqlite数据库文件添加到支持文件夹中，并在Appdelegate文件中添加此代码：

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary  *)launchOptions
{
    [self createDatabaseExecutableFile];
}

，方法代码是

// Creates a writable copy of the bundled default database in the application Documents directory.
- (void) createDatabaseExecutableFile 
{
    // First, test for existence.
    BOOL _success;
    NSFileManager* _fileManager = [NSFileManager defaultManager];
    NSError* _error;
    NSArray* _paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString* _documentsDirectory = [_paths objectAtIndex:0];
    NSString* _writableDBPath = [_documentsDirectory stringByAppendingPathComponent:@"turfnutritiontool_ver_two.db"];
    _success = [_fileManager fileExistsAtPath:_writableDBPath];
    if (_success)
        return;
    // The writable database does not exist, so copy the default to the appropriate location.
    NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"turfnutritiontool_ver_two.db"];
    _success = [_fileManager copyItemAtPath:defaultDBPath toPath:_writableDBPath error:&_error];
    if (!_success) {
        NSAssert1(0, @"Failed to create writable database file with message '%@'.", [_error localizedDescription]);
    }
}

Answer 1

好吧，让我问你监狱打破你的ios设备......

任何方式逐行调试并检查是否

您的_writableDBPath值并检查db是否在该位置。

希望这会对你有所帮助