loading a UITableViewController from a selected indexpath in a UICollectionViewController

Question

Im trying to get the VC that corresponds with the cell of the table view to load when tapped. I am trying to set the indexPath as the selectedIndexPath and set up the segue in the collection view, then use that in the tableView but it is throwing an error. Here is the code.

import UIKit

private let reuseIdentifier = "profileCell"


class CompanyCollectionViewController: UICollectionViewController {

//MARK: - View Did Load

override func viewDidLoad() {
    super.viewDidLoad()
    navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil)

}


// MARK: UICollectionViewDataSource

override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    return 1
}


override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return stuff.company.count
}

override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! ProfileCollectionViewCell

    cell.profileImageView.image = UIImage(named: stuff.company[indexPath.row]["image"]!)

    return cell
}

//MARK: - Prepare For Segue

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "profileSegue" {
        let profileVC = segue.destinationViewController as!
            MyProfileTableViewController
        let cell = sender as! UICollectionViewCell
        let indexPath = collectionView?.indexPathForCell(cell)

        profileVC.selectedIndexPath = indexPath

    }
}

}

and then

import UIKit

class MyProfileTableViewController: UITableViewController {

//MARK: - View Did Load

override func viewDidLoad() {
    super.viewDidLoad()
}





//MARK: - Table View Data Source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return 1
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 1
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    if let indexPath = selectedIndexPath {

        let row = stuff.company[indexPath.row]

        let cell = tableView.dequeueReusableCellWithIdentifier("myProfileCell", forIndexPath: indexPath) as! MyProfileTableViewCell
            cell.heroImageView.image = UIImage(named: row["image"]!)
            title = row["name"]
            cell.nameLabel.text = row["name"]
            cell.statusLabel.text = row["description"]
            return cell

    } else {
        let cell = tableView.dequeueReusableCellWithIdentifier("myProfileCell", forIndexPath: indexPath) as! MyProfileTableViewCell
        cell.heroImageView.image = UIImage(named: stuff.profile["profile image"]!)
        title = stuff.profile["name"]
        cell.nameLabel.text = stuff.profile["name"]
        cell.statusLabel.text = stuff.profile["status"]
        return cell
    }
}

//MARK: - Variables

var selectedIndexPath: NSIndexPath?

}

Answer 1

Ah I see, you are not checking if your collectionView?.indexPathForCell is returning a valid result.

   if let cell = sender as? UICollectionViewCell {
       // Cell is valid
       if let indexPath = collectionView?.indexPathForCell(cell) {
           // indexPath is valid
       } else {
           // indexPath is invalid
       }
   } else {
       // cell is invalid
   }

I suspect your indexPath from your table and your indexPath from your selection view are being mixed up, the code posted above should help you debug that.

Beyond that, I believe you can accomplish your intended result by:

1) Saving your selectedIndexPath in the didSelectCellAtIndexPath: method

2) Reading the selectedIndexPath in prepareForSegue instead of deriving the indexPath from the segue sender