应用程序在数据库创建尝试时崩溃

Question

我使用"SQLite数据库浏览器"创建了一个sql数据库,将其拖放到我的Xcode项目中,并构建了应用程序.它在模拟器上工作得非常好但在iPhone上崩溃,出现此错误:

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', 
 reason: 'Failed to create writable database file with message 'The operation could‚ 
not be completed. (Cocoa error 260.)'.'   

这是我的代码:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Creates a writable copy of the bundled default database in the application Documents directory:
    NSLog(@"AppDelegate...Looking for embedded Database file...");
    BOOL success;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    // Grab the path to the Documents folder:
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:@"users.sql"];

    success = [fileManager fileExistsAtPath:writableDBPath];
    if (success) {
        NSLog(@"Database File Exists in Documents folder!");
        NSLog(@"Its path is: %@", writableDBPath);
        return YES;
    }
    else {
    // But if the writable database does not exist, copy the default to the appropriate location.
    NSLog(@"!!NO Database File Exists in Documents folder!");
    NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"users.sql"];
    success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error];
    if (!success) {
        NSAssert1(0, @"Failed to create writable database file with message '%@'.", [error localizedDescription]);
    }
    else 
        NSLog(@"WROTE THE DATABASE FILE!!!");
}

return YES;
}

同样,这适用于模拟器,但不适用于iPhone.(这与文件有任何关系都没有".sql"扩展名而不是".sqlite"扩展名,可能吗？因为这是"SQLite数据库浏览器"给它创建的文件的扩展名. .)

Answer 1

答案与确保正确设置sql文件的"目标成员资格"有关,以便项目"看到"它:

1)单击Xco​​de左窗格中的sql文件

2)打开/显示文件检查器(右窗格)

3)在"目标会员资格"下,确保"检查"已"检查"

而已.