ios - Sqlite数据库，滑动删除

Question

我正在从事的项目要求我使用 sqlite 数据库，并且我一直在尝试滑动删除以在我的 tableView 上工作:

[self performSelectorOnMainThread:@selector(removeMovieFromCache:) withObject:[NSNumber numberWithInt:movieId] waitUntilDone:YES];
    [db performSelectorOnMainThread:@selector(performQuery:) withObject:[NSString stringWithFormat:@"DELETE FROM movie WHERE id = %d", movieId] waitUntilDone:YES];
    [db performSelectorOnMainThread:@selector(performQuery:) withObject:[NSString stringWithFormat:@"DELETE FROM new_movies WHERE new_movie_id = %d", movieId] waitUntilDone:YES];
    [self removeMovieFromCache:movieId];
    [db performQueryWithFormat:@"DELETE FROM movie WHERE id = %d", movieId];
    [db performQueryWithFormat:@"DELETE FROM new_movies WHERE new_movie_id = %d", movieId];
    [db performQuery:@"COMMIT"];

这是从我的数据库中删除某些内容的代码。当我尝试将此应用到我的滑动删除命令时:

-

(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)movieID
{
    if (editingStyle == UITableViewCellEditingStyleDelete)
    {        

      //code goes here        
    }
}

它只是不想工作，我做错了什么？

Answer 1

在你的 tableView 数据源中，尝试实现这个:

(UITableViewCellEditingStyle)tableView:(UITableView*)tableView editingStyleForRowAtIndexPath:(NSIndexPath*)indexPath 
{
   return UITableViewCellEditingStyleDelete;
}


(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath 
{
   return YES;
}

(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)movieID
{
    if (editingStyle == UITableViewCellEditingStyleDelete)
    {       
       // First delete the row from the table, then delete from the DB, finally reload the date in the table 
       [theTable deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];
       // code to delete from DB
       [theTable reloadData];        
    }
}

(将“theTable”替换为您对表格的命名!)