如何在表之间复制单元格作为脉冲应用程序 [英] How to copy cells between tables as the pulse app
本文介绍了如何在表之间复制单元格作为脉冲应用程序的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要在两个表视图之间复制单元格 。
I need to copy cells between 2 table views.
我有一个或多或少的工作解决方案。但是，它不顺利，我想要做类似于 pulse app reorder feeds选项...
I have a more-or-less working solution. However, it is not smooth, and I would love to do something similar to the pulse app reorder feeds option...
这种脉冲工作原理的特殊之处在于重新排序动画与
Something special in the way that pulse works, is that the reorder animation is the same as in a normal reorder of cells, but still the cell can move between tables.
这是我现在的情况：
- (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;
}
}
UPDATE： ve创建了一个开源项目来显示我的进度：
UPDATE: I've created an open source project to show my progress so far:
https://bitbucket.org/elmalabarista/dragdroptableviews
推荐答案
尝试这些链接，其中提供了如何
Try these links which gives a sample on how to do this.
- https://github.com/ardalahmet/CopyableCell
- https://github.com/Pretz/CopyableTableView
这可能会对您有所帮助。
This may help you.
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