如何让UITableView重新排列？

Question

我正在尝试使我的UITableView可编辑,以便您可以移动单元格.现在当我点击编辑按钮时,它只允许我删除但不重新安排.

我的方法是:

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

- (void)setEditing:(BOOL)editing animated:(BOOL)animate
{
    [self.routineTableView setEditing: !self.routineTableView.editing animated:YES];

    if (self.routineTableView.editing)
        [self.navigationItem.leftBarButtonItem setTitle:@"Done"];
    else
        [self.navigationItem.leftBarButtonItem setTitle:@"Edit"];
}

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
 {
     if (editingStyle == UITableViewCellEditingStyleDelete) 
     {
         NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
         [context deleteObject:[self.fetchedResultsController objectAtIndexPath:indexPath]];
         NSLog(@"fetched results : \n%@\n",[self.fetchedResultsController fetchedObjects]);

         NSError *error = nil;

         if (![managedObjectContext save:&error]) 
         {
             // Handle the error.
         }
    }

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

Answer 1

为了正确实现重新排序行,表视图数据源应该实现如下方法:

-(BOOL)tableView:(UITableView *)tableView
canMoveRowAtIndexPath:(NSIndexPath *)indexPath;
-(void)tableView:(UITableView *)tableView
moveRowAtIndexPath:(NSIndexPath *)fromIndexPath
       toIndexPath:(NSIndexPath *)toIndexPath;

并且其代表可以实施:

-(NSIndexPath *)tableView:(UITableView *)tableView
targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath
                     toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath;

此页面还提供了代码示例.