Question

- init
{
    if(![super init]) return nil;

    //the database is stored in the application bundle.
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *path = [documentsDirectory stringByAppendingFormat:@"/base.sqlite"];
    NSLog(@"%@",path);
    db = [FMDatabase databaseWithPath:path];
    [db setLogsErrors:YES];

    if (![db open]) { 
        NSLog(@"Could not open db."); 
        return 0; 
    } else { 
        NSLog(@"DB Open...."); 
    } 

    FMResultSet *rs = [db executeQuery:@"SELECT * FROM settings"]; 

    return self; 
}

这是我用来尝试从设置中访问数据的代码。但是这会产生错误（我可以向你保证有一个设置表！）

这是来自终端的转储

BEGIN TRANSACTION;
CREATE TABLE About (id integer PRIMARY KEY AUTOINCREMENT,key varchar UNIQUE,value text);
DELETE FROM sqlite_sequence;
CREATE TABLE settings (version integer,updated timestamp,owner varchar);
INSERT INTO "settings" VALUES(1,'2009-05-11 14:29:07','boulevart');
COMMIT;

和错误：

2009-05-11 16:14:19.799 SummerGuide[9892:20b] /Users/andyjacobs/Library/Application Support/iPhone Simulator/User/Applications/762630F5-78CB-41A4-85C2-964316ACFE1D/Documents/base.sqlite
2009-05-11 16:14:19.801 SummerGuide[9892:20b] DB Open....
2009-05-11 16:14:19.804 SummerGuide[9892:20b] DB Error: 1 "no such table: settings"
2009-05-11 16:14:19.804 SummerGuide[9892:20b] DB Query: SELECT * FROM settings

奇怪的是，如果我改变我的路径，例如/baseeeeee.sqlite（这不是没有文件），它仍然说“DB Open ....”

我刚刚将一个现有的sqlite文件（base.sqlite）添加到我的recourse文件夹中，并将sqlite3 lib添加到我的框架中。

Answer 1

要获取应用包中文件的路径，请使用以下命令：

[[NSBundle mainBundle] pathForResource:@"base" ofType:@"sqlite"];

要实际打开数据库，您可能必须先将其复制到Documents目录，因为尝试修改应用包中的文件是个坏消息。

iphone FMDB找不到表

1 个答案: