在具有UITableView的UICollectionView中拖放

Question

I'm having UICollectionView that scrolls horizontally. Each collection view cell has a table view that scrolls vertically. I want to implement drag and drop of table view cell with in the table view itself as well as between different tableviews within each collection view cell.
Need some tutorial or help to achieve the functionality.

Answer 1

You can try these tutorials

https://www.raywenderlich.com/63089/cookbook-moving-table-view-cells-with-a-long-press-gesture http://www.freshconsulting.com/create-drag-and-drop-uitableview-swift/ http://www.andypierz.com/blog/2014/11/9/basic-drag-and-drop-uitableviews-using-swift-and-core-data

http://www.iostute.com/2016/02/how-to-re-order-table-view-cell-by-drag.html

Some helpful Libraries

https://github.com/andreamazz/UIView-draggable
https://github.com/ra1028/RACollectionViewReorderableTripletLayout
https://github.com/lukescott/DraggableCollectionView
https://github.com/grillbiff/DragAndDropTableView

Answer 2

@Satyam, it may help you to get some idea. trello ios application has their own lib to get those behaviour.

-> uiViewController    
 -> uiScrollView
   -> uiPageViewController
     -> uiTableViewController
       -> drag and drop behaviour. while dragging, scrollview helps you to get the moving behaviour. 

https://www.cocoacontrols.com/controls/icarousel

Answer 3

Quickly whipped up a test project, and as far as I've tested, it works fine.

https://github.com/BridgeTheGap/Trelloesque

The secret is the following two methods:

func convertPointToIndexPath(point: CGPoint) -> (UITableView, NSIndexPath)? {
    if let tableView = [tableView1, tableView2, tableView3].filter({ $0.frame.contains(point) }).first {
        let localPoint = scrollView.convertPoint(point, toView: tableView)
        let lastRowIndex = focus?.0 === tableView ? tableView.numberOfRowsInSection(0) - 1 : tableView.numberOfRowsInSection(0)
        let indexPath = tableView.indexPathForRowAtPoint(localPoint) ?? NSIndexPath(forRow: lastRowIndex, inSection: 0)
        return (tableView, indexPath)
    }

    return nil
}

While not exactly the same, I think it has enough for you to work on.

• Disclaimer: didn't have time to test it, so may be bug-prone.