Question

当我在iPhone模拟器中运行此代码时，我无法从DB中删除记录。如果我在SQLite DB Browser中运行此查询，则效果很好。这是我的代码

SQLiteDB *sqliteConnect=[[SQLiteDB alloc] init];
sqlite3 *database;

if(sqlite3_open([sqliteConnect.databasePath UTF8String], &database)==SQLITE_OK)
{   
    sqlite3_stmt *compiledstatement;

    const char *sqlstmt="delete from searchHistory where id = (select min(id) from searchHistory) ";

    if(sqlite3_prepare_v2(database, sqlstmt, -1, &compiledstatement, NULL)==SQLITE_OK)
    {
        sqlite3_step(compiledstatement);

        if(SQLITE_DONE != sqlite3_step(compiledstatement))

            NSAssert1(0,@"Error while creating delete statement => %s",sqlite3_errmsg(database) );
    }
    NSLog(@"delete DONE");
    sqlite3_finalize(compiledstatement);
}
sqlite3_close(database);

当我使用调试器运行时，我得到以下错误=＆gt;

2011-04-08 08:42:34.049 MyApp[1838:20b] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Error while creating delete statement => not an error'

SQLiteDB是我的类，包含init和amp;的逻辑。 checkAndCopyDB方法。我的数据库被复制到文档目录中。其他DB操作工作正常。请帮我。感谢

Answer 1

你正在调用sqlite3_step两次吗？

试试这个：

{
    int result = sqlite3_step(compiledstatement);

    if(SQLITE_DONE != result)

        NSAssert1(0,@"Error while creating delete statement => %s",sqlite3_errmsg(database) );
 }

Answer 2

也许试试：

if(SQLITE_DONE != sqlite3_step(compiledstatement))
    NSAssert1(0,@"Error while creating delete statement => %s",sqlite3_errmsg(database));

无法从SQLite iPhone中删除记录

2 个答案: