Как скопировать ячейки между таблицами в качестве импульсного приложения

Question

Мне нужно скопировать ячейки между двумя табличными представлениями .

У меня есть более-менее рабочее решение.Однако, это не гладко, и я хотел бы сделать что-то похожее на импульсное приложение опция переупорядочения каналов ...

Что-то особенное в том, как работает импульс, в том, что переупорядочениеанимация такая же, как и при обычном переупорядочении ячеек, но все же ячейка может перемещаться между таблицами.

Вот что у меня сейчас:

- (BoardColumnView *) addColumn:(NSString *)title type:(ColumnType)type{
    BoardColumnView *col = [BoardColumnView createColumn:title];

    [self.columns addObject:col];

    // Add a pinch gesture recognizer to the table view.
    UILongPressGestureRecognizer* draggingRecognizer = [[UILongPressGestureRecognizer alloc] 
                                                    initWithTarget:self 
                                                    action:@selector(moveActionGestureRecognizerStateChanged:)
                                                   ];

    draggingRecognizer.minimumPressDuration = 0.5;
    draggingRecognizer.delegate = self;

    [col.tableView addGestureRecognizer:draggingRecognizer];
    [draggingRecognizer release]; 


    return col;
}

#pragma mark -
#pragma mark UIGestureRecognizer Delegate/Actions

- (BOOL) gestureRecognizerShouldBegin: (UIGestureRecognizer *) gestureRecognizer
{
    ALog(@"Drag detected");
    return YES;
}

- (void) moveActionGestureRecognizerStateChanged: (UIGestureRecognizer *) recognizer
{
    switch ( recognizer.state )
    {
        default:
        case UIGestureRecognizerStateFailed:
            // do nothing
            break;

        case UIGestureRecognizerStatePossible:
        case UIGestureRecognizerStateCancelled:
        {
            ALog(@"Canceled");

            [UIView beginAnimations: @"SnapBack" context: NULL];
            [UIView setAnimationCurve: UIViewAnimationCurveEaseOut];
            [UIView setAnimationDuration: 0.5];
            [UIView setAnimationDelegate: self];
            [UIView setAnimationDidStopSelector: @selector(finishedSnap:finished:context:)];

            CGRect f = self.dragView.frame;
            f.origin = _dragOriginCellOrigin;
            self.dragView.frame = f;

            [UIView commitAnimations];

            break;
        }
        case UIGestureRecognizerStateEnded:
        {
            // move the real cell into place
            [UIView beginAnimations: @"SnapToPlace" context: NULL];
            [UIView setAnimationCurve: UIViewAnimationCurveEaseOut];
            [UIView setAnimationDuration: 0.5];
            [UIView setAnimationDelegate: self];
            [UIView setAnimationDidStopSelector: @selector(finishedSnap:finished:context:)];

            CGRect r = self.dragView.frame;//[self.content rectForItemAtIndex: _emptyCellIndex];
            CGRect f = self.dragView.frame;
            f.origin.x = r.origin.x + floorf((r.size.width - f.size.width) * 0.5);
            f.origin.y = r.origin.y + floorf((r.size.height - f.size.height) * 0.5);
            NSLog( @"Gesture ended-- moving to %@", NSStringFromCGRect(f) );
            self.dragView.frame = f;

            self.dragView.transform = CGAffineTransformIdentity;
            self.dragView.alpha = 1.0;

            [UIView commitAnimations];
            break;
        }

        case UIGestureRecognizerStateBegan:
        {           
            ALog(@"Start move..");
            // find the cell at the current point and copy it into our main view, applying some transforms
            _lastColumn = (BoardColumnView *)[(UITableView *)recognizer.view superview];
            _targetColumn = _lastColumn;

            if (_lastIndexPath) {
                [_lastIndexPath release];
                _lastIndexPath = nil;
            }

            _lastIndexPath = [_lastColumn.tableView indexPathForRowAtPoint:[recognizer locationInView: _lastColumn]];

            UITableViewCell *sourceCell = [_lastColumn.tableView cellForRowAtIndexPath:_lastIndexPath];

            CGRect frame = [_lastColumn convertRect: sourceCell.frame fromView: self.content];

            self.dragView = [[[UIImageView alloc] initWithImage:[sourceCell screenshot]] autorelease];
            self.dragView.opaque = YES;
            self.dragView.backgroundColor = _lastColumn.backgroundColor;

            self.dragView.center = [recognizer locationInView: self.view];
            //self.dragView.cornerRadius = 8; // if you like rounded corners
            self.dragView.layer.shadowOffset = CGSizeMake(-5, 2);
            self.dragView.layer.shadowRadius = 5;
            self.dragView.layer.shadowOpacity = 0.5;

            [content addSubview: self.dragView];

            [content bringSubviewToFront:self.dragView];
            // grab some info about the origin of this cell
            _dragOriginCellOrigin = frame.origin;

            [UIView beginAnimations: @"" context: NULL];
            [UIView setAnimationDuration: 0.2];
            [UIView setAnimationCurve: UIViewAnimationCurveEaseOut];

            // transformation-- larger, slightly transparent
            self.dragView.transform = CGAffineTransformMakeScale( 1.2, 1.2 );
            self.dragView.alpha = 0.7;

            [UIView commitAnimations];

            /* // reload the grid underneath to get the empty cell in place
            [self.content reloadItemsAtIndices: [NSIndexSet indexSetWithIndex: index]
                              withAnimation: AQGridViewItemAnimationNone];
            */
            break;
        }

        case UIGestureRecognizerStateChanged:
        {
            // update draging cell location
            self.dragView.center = [recognizer locationInView: self.view];

            //Determinar sobre que columna esta flotando..
            CGRect global;

            if (_targetColumn) {
                _targetColumn = nil;
            }
            for (BoardColumnView *col in self.columns) {
                UITableView *table = col.tableView;
                global = [table convertRect:self.dragView.frame fromView:content];

                if ([table pointInside:global.origin withEvent:nil]) {
                    ALog([NSString stringWithFormat: @"Esta sobre la tabla %@", col.column.name]);
                    _targetColumn = col;
                    break;
                }
            }

            if ( !_targetColumn )
            {                
                ALog(@"Esta en zona muerta");
            }

            break;
        }
    }
}

- (void) finishedSnap: (NSString *) animationID finished: (NSNumber *) finished context: (void *) context
{       
    if (_targetColumn && _lastIndexPath) {      
        ALog(@"Moviendo a nuevo destino");

        CGRect frame = [_targetColumn convertRect: self.dragView.frame fromView: self.content];     
        NSIndexPath *destPath  = [_targetColumn.tableView indexPathForRowAtPoint: frame.origin];

        [UIView beginAnimations: @"" context: NULL];
        [UIView setAnimationDelegate:self];
        [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];

        self.dragView.backgroundColor = _targetColumn.backgroundColor;

        //Si inserta entre tareas en destino...

        _lastColumn.totalRows -= 1;
        _targetColumn.totalRows += 1;

        [_lastColumn.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:_lastIndexPath] withRowAnimation:UITableViewRowAnimationTop];

        if (destPath) {         
            [_targetColumn.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:destPath] withRowAnimation:UITableViewRowAnimationBottom];
        } else {
            [_targetColumn.tableView reloadData];
        }



        [UIView commitAnimations];
    } else {        
        ALog(@"Cancelado el moviento, regresar a home");

        UITableViewCell * sourceCell = [_lastColumn.tableView cellForRowAtIndexPath:_lastIndexPath];        
        if (sourceCell) {

            [UIView beginAnimations: @"Back" context: NULL];
            [UIView setAnimationCurve: UIViewAnimationCurveEaseOut];
            [UIView setAnimationDuration: 0.5];
            [UIView setAnimationDelegate:self];
            [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];

            //self.dragView.transform = CGAffineTransformIdentity;
            self.dragView.frame = [self.content convertRect: sourceCell.frame fromView: _lastColumn];
            //self.dragView.alpha = 0.0;

            [UIView commitAnimations];      
        }
    }
}

- (void)animationDidStop:(id)animationID finished:(BOOL)flag context:(id)context {
    // dismiss our copy of the cell
    ALog(@"Eliminando drag view");
    [self.dragView removeFromSuperview];
    self.dragView = nil;

    _lastColumn = nil;
    _targetColumn = nil;

    if (_lastIndexPath) {
        _lastIndexPath = nil;
    }   
}

ОБНОВЛЕНИЕ: Я создал проект с открытым исходным кодом, чтобы показать мой прогресс:

https://bitbucket.org/elmalabarista/dragdroptableviews

Answer 1

Попробуйте эти ссылки, которые дают образец того, как это сделать.

• https://github.com/ardalahmet/CopyableCell
• https://github.com/Pretz/CopyableTableView

Это может помочь вам.