ios - 如何在 Xcode 中将 .sql 文件添加到 sqlite 数据库

Question

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Answer 1

如果您已经创建了 .sqlite 文件并在其中包含表，那么将 .sqlite 文件添加到 xcode 中，就像从桌面拖到您的包(资源)中一样。然后使用 NSFileManager 访问 sqlite 文件。您需要编写创建数据库和初始化数据库的方法，您还可以在文档文件夹/模拟器文件夹中看到 sqlite 文件。

- (void)createEditableCopyOfDatabaseIfNeeded {
    NSLog(@"Checking for database file");
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSString *dbPath = [self getDBPath];
    NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"ihaikudb.sql"];
    BOOL success = [fileManager fileExistsAtPath:dbPath]; 

    NSLog(@"If needed, bundled default DB is at: %@",defaultDBPath);

    if(!success) {
        NSLog(@"Database didn't exist... Copying default from resource dir");
        success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];

        if (!success) 
            NSAssert1(0, @"Failed to create writable database file with message '%@'.", [error localizedDescription]);
    } else {
        NSLog(@"Database must have existed at the following path: %@", dbPath);
    }
    NSLog(@"Done checking for db file");
}