How to populate different array values in collection view inside of UITableview using swift?

Question

I am created UICollectionView inside of UITableView ,populating array values in UItableview is working perfect, when trying to populate a array values into collectionView getting same values in collectionView of all the rows of tableView, I want to populate a zeroth index array in collectionview of zeroth row UItableview and so on below I tried a sample,

class ViewController: UIViewController,UITableViewDataSource,UITableViewDelegate,UICollectionViewDelegate,UICollectionViewDataSource{


        let array = ["product 1","product 2","product 3","product4"]
        let array1 = ["product id 1","product id 2","product id 3","product id 4"]
        let array2 = [["product id 1","product id 2"],["product id 3","product id 4"],["product id 5","product id 6"],["product id 7","product id 8","product id 9","product id 10","product id 11"]] as [NSArray]


     func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
            return array.count
        }

        func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
            let cell : TableViewCell = tableView.dequeueReusableCell(withIdentifier: "cells") as! TableViewCell
            cell.tableviewlabel1.text = array[indexPath.row]
             cell.tableviewlabel2.text = array1[indexPath.row]
            return cell
        }
     func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
            return array2.count
        }

        func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
            let cell : CollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "collection", for: indexPath) as! CollectionViewCell


            let rowValue : NSArray = array2[indexPath.row]
            for i in 0..<rowValue.count {
            cell.collectionviewlabel1.text = rowValue[i] as? String
            }
            return cell

        }

For example ,I want a zeroth index of array2 values in collectionview of zeroth row of tableview, and first index values in collectionview of first row of tableview and so on.

Your collection view data source methods should be in your cell class, not in your view controller. — Paulw11, Oct 11 '18 at 10:18
yeah, I implemented my collectionview inside of uitableviewcell — Kavitha Madhu, Oct 11 '18 at 10:18
then follow the @Paulw11 comment it must be inside in your tableview cell — Wings, Oct 11 '18 at 10:19
Yes, but your cell class must implement `UICollectionViewDataSource`, not your view controller — Paulw11, Oct 11 '18 at 10:20
yeah, thank you..can u suggest some sample for this @ Paulw11 and V_rohit — Kavitha Madhu, Oct 11 '18 at 10:21
Preferred below link :-https://stackoverflow.com/questions/31582378/ios-8-swift-tableview-with-embedded-collectionview or https://medium.com/@aestusLabs/adding-a-uicollectionviews-to-a-custom-uitableviewcell-xib-tutorial-swift-4-xcode-9-2-1ec9ce4095d3 — V D Purohit, Oct 11 '18 at 11:49
@KavithaMadhu please note that [I rejected your suggested edit](https://stackoverflow.com/review/suggested-edits/21145653) because you should "_Use '#selector' instead of explicitly constructing a 'Selector'_". (this is an Xcode warning) — Cœur, Oct 17 '18 at 03:00

Amit · Accepted Answer · 2018-10-11T10:56:46.090

First your array2 has to be like this :

let array2 = [["product id 1","product id 2"],["product id 3","product id 4"],["product id 5","product id 6"],["product id 7","product id 8","product id 9","product id 10","product id 11"]]

Don't use NSArray in Swift. you can write it as [String], [[String]].

Your ViewController will have only UITableViewDelegate and UITableViewDatasource methods:

extension ViewController: UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return array.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell : TableViewCell = tableView.dequeueReusableCell(withIdentifier: "cells") as! TableViewCell
        cell.tableviewlabel1.text = array[indexPath.row]
        cell.tableviewlabel2.text = array1[indexPath.row]

        cell.arrayForCollectionView = array2
        return cell
    }
}

Then in your TableViewCell:

class TableViewCell: UITableViewCell {

    var arrayForCollectionView : [[String]]! {
        didSet {
            self.collectionView.reloadData
        }
    }

    @IBOutlet weak var collectionView: UICollectionView!

}

extension TableViewCell : UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        if (arrayForCollectionView != nil) {
            return arrayForCollectionView.count
        }
        return 0
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell : CollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "collection", for: indexPath) as! CollectionViewCell


        let rowValue = arrayForCollectionView[indexPath.row]
        for i in 0..<rowValue.count {
            cell.collectionviewlabel1.text = rowValue[i] as? String
        }
        return cell
    }
}

Let me know if you are getting any issue.

getting Cannot subscript a value of type '[[String]]!' error. in let rowValue : NSArray = arrayForCollectionView[indexPath.row] — Kavitha Madhu, Oct 11 '18 at 10:49
Hello Amit, I didn't get what I asked ...In my collection view getting product id 2,product id 4,product id 6,product id 11 and all the rows of uitableview — Kavitha Madhu, Oct 11 '18 at 11:10
Thanks Amit ..I just edited in this line "cell.arrayForCollectionView = array2" as " "cell.arrayForCollectionView = array2[indexpath.row]" ..its working perfect ,thanks for ur contribution — Kavitha Madhu, Oct 11 '18 at 12:31

score 1 · Answer 2 · answered Oct 11 '18 at 10:26

Giving an example for that:

first tableView is inside ViewController

 class ViewController: UIViewController {

//MARK:- IBOUTELTS
//MARK:-
@IBOutlet weak var tableView: UITableView!

//MARK:- VARIABLES
//MARK:-

override func viewDidLoad() {
    super.viewDidLoad()


}


}

extension YourViewConroller: UITableViewDataSource, UITableViewDelegate {

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {


}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {


}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {


}

}

And Your CollectionView is inside TableViewCell

 extension YourTableViewCell: UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {


}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {

}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {



}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

}


}

And make different class for TableView and CollectionView:

 class YourTableViewCell: UITableViewCell { // tableview cell

}


 classYourCollectionViewCell: UICollectionViewCell { // collectionviewcell

  }

Thanks for ur contribution..@V_rohit – Kavitha Madhu Oct 11 '18 at 12:31 — Kavitha Madhu, Oct 11 '18 at 12:31

How to populate different array values in collection view inside of UITableview using swift?

2 Answers2