How can I segue from UICollectionView's cells embedded inside UITableViewCell (Swift)? - swift

Question

I have used this tutorial to successfully embed a UICollectionView inside a UITableView I have in my ViewController.
The following will probably make more sense if you have a quick look at the linked tutorial's code (plus its a nifty thing to learn too!):
The next step for me is to perform segues from the cells of the UICollectionView inside the UITableViewCells of the tableView, but as the collectionView outlet is established in a separate View Controller, I am not sure how to reference it in the main ViewController.
In the TableViewCell.swift there is:
class TableViewCell: UITableViewCell {
#IBOutlet private weak var collectionView: UICollectionView!
}
extension TableViewCell {
func setCollectionViewDataSourceDelegate<D: protocol<UICollectionViewDataSource, UICollectionViewDelegate>>(dataSourceDelegate: D, forRow row: Int) {
collectionView.delegate = dataSourceDelegate
collectionView.dataSource = dataSourceDelegate
collectionView.tag = row
collectionView.reloadData()
}
}
And in the ViewController.swift I need to be able to, for instance, call the collectionView that is in the TableViewCell in the prepareForSegue function that would go in the ViewController.swift file. I just need to fill the gaps with the collectionView outlet:
let destination = segue.destinationViewController as! SecondViewController
let indexPaths = self.___________.indexPathsForSelectedItems()
let indexPath = indexPaths![0] as NSIndexPath
let arrayObject = self.arrayObjects[indexPath.row]
destination.object = arrayObject
'object' is implemented in SecondViewController like so, var object: PFObject!.
I now need to fill the gap, ________, in the above code with the collectionView in order to display the correct 'object' in SecondViewController (the destinationViewController)

Answer 1

Add Push Segue from UICollectionViewCell to YourViewController from IB.
Give an identifier to your segue ("YourSegueIdentifier").
In your custom UITableViewController or UIViewController, override prepareForSegue() method.
This is:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "YourSegueIdentifier" {
if let collectionCell: YourCollectionViewCell = sender as? YourCollectionViewCell {
if let collectionView: UICollectionView = collectionCell.superview as? UICollectionView {
if let destination = segue.destination as? YourViewController {
// Pass some data to YourViewController
// collectionView.tag will give your selected tableView index
destination.someObject = tableObjects[collectionView.tag].someObject
destination.productId = collectionCell.product?.id
}
}
}
}
}

Answer 2

Hi I had the same problem
This is what I did :
1. set a tag for the cell in the extension in your first View Controller
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("advertisementCollectionCell",forIndexPath: indexPath) as! AdvertisementCollectionViewCell
// set your cell information
cell.tag = indexPath.row
return cell
}
2. Do a segue on the storyboard from the UIcollectionViewCell to the new View Controller
3. In prepareForSegue of the first TableViewController :
else if segue.identifier == "identifier"
{
let destinationViewController = segue.destinationViewController as! DestinationViewController
if let cell = sender as? MyCollectionViewCell
{
let indexPath = cell.tag
// use indexPath :D
}
}

Answer 3

i just played with the code you attached. i added segue in story board manually. its easy to call .
1) just add viewcontroller to the storyboard.
2) Controll+ drag and drop segue from collectionview cell

Answer 4

In your code, the reference to CollectionView is connected in TableViewCell.
So, you can refer it through TableViewCell and set datasource and delegate.
To add connect into your code, you have to select the CollectionView with RightButton and drag and drop into #IBOutlet private weak var collectionView: UICollectionView!
When clicks the CollectionViewCell, collectionView(collectionView:UICollectionView, didselecteditemAtIndexPath indexPath: NSIndexPath) function of UICollectionViewDelegate will be called by delegate.
At that time, you can segue by calling performSegue in this function.
As you write in your code, the index of tableview is set by tag, so you can get the index by tag using collectionView.tag()
The code will be as following.
var tableViewIndex = collectionView.tag()
So you can refer the correct cell using tableViewIndex and indexPath.
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
var tableViewIndex = collectionView.tag;
self.performSegueWithIdentifier("segueIdentifier", sender: self)
}