Horizontally scroll ALL rows of UICollectionView t

Question

I have UITableView. Inside UITableViewCell I have placed UICollectionView. Currently all the row scrolling individually. What I need is when User scroll any row in horizontally manner (left to right or right to left) all the row must be scroll on same pattern.

I have followed the below link but no success

Scroll Multiple UICollectionView with one collectionview IOS

Manually scrolling two UICollectionViews showing the same content

Please have look my code

ViewController

import UIKit

class ViewController: UIViewController, UITableViewDataSource {

    var categories = ["Header 1", "Header 2", "Header 3", "Header 4", "Header 5", "Header 6", "Header 7", "Header 8"]

    @IBOutlet var myTableView: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()

        myTableView.dataSource = self
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        return categories[section]
    }

    func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return categories.count
    }

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

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        var cell = tableView.dequeueReusableCellWithIdentifier("cell") as? CategoryRow
        if cell == nil {
            cell = CategoryRow(style:UITableViewCellStyle.Subtitle, reuseIdentifier:"cell")
        }
        else {
        }
        cell!.tag = indexPath.section
        cell?.collection.reloadData()
        return cell!
    }
}

MyCollectionViewCell

import UIKit

class MyCollectionViewCell: UICollectionViewCell {

    @IBOutlet var title: UILabel!
    @IBOutlet var data: UILabel!
}

CategoryRow

import UIKit

class CategoryRow: UITableViewCell, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, UIScrollViewDelegate {

    var Title1 = ["1st Title 1", "1st Title 2", "1st Title 3", "1st Title 4", "1st Title 5", "1st Title 6", "1st Title 7", "1st Title 8"]
    var Data1 =  ["1st Data 1", "1st Data 2", "1st Data 3", "1st Data 4", "1st Data 5", "1st Data 6", "1st Data 7", "1st Data 8"]

    var Title2 = ["2nd Title 1", "2nd Title 2", "2nd Title 3", "2nd Title 4", "2nd Title 5", "2nd Title 6", "2nd Title 7", "2nd Title 8"]
    var Data2 =  ["2nd Data 1", "2nd Data 2", "2nd Data 3", "2nd Data 4", "2nd Data 5", "2nd Data 6", "2nd Data 7", "2nd Data 8"]

    var Title3 = ["3rd Title 1", "3rd Title 2", "3rd Title 3", "3rd Title 4", "3rd Title 5", "3rd Title 6", "3rd Title 7", "3rd Title 8"]
    var Data3 =  ["3rd Data 1", "3rd Data 2", "3rd Data 3", "3rd Data 4", "3rd Data 5", "3rd Data 6", "3rd Data 7", "3rd Data 8"]

    var Title4 = ["4th Title 1", "4th Title 2", "4th Title 3", "4th Title 4", "4th Title 5", "4th Title 6", "4th Title 7", "4th Title 8"]
    var Data4 =  ["4th Data 1", "4th Data 2", "4th Data 3", "4th Data 4", "4th Data 5", "4th Data 6", "4th Data 7", "4th Data 8"]

    var Title5 = ["5th Title 1", "5th Title 2", "5th Title 3", "5th Title 4", "5th Title 5", "5th Title 6", "5th Title 7", "5th Title 8"]
    var Data5 =  ["5th Data 1", "5th Data 2", "5th Data 3", "5th Data 4", "5th Data 5", "5th Data 6", "5th Data 7", "5th Data 8"]

    var Title6 = ["6th Title 1", "6th Title 2", "6th Title 3", "6th Title 4", "6th Title 5", "6th Title 6", "6th Title 7", "6th Title 8"]
    var Data6 =  ["6th Data 1", "6th Data 2", "6th Data 3", "6th Data 4", "6th Data 5", "6th Data 6", "6th Data 7", "6th Data 8"]

    var Title7 = ["7th Title 1", "7th Title 2", "7th Title 3", "7th Title 4", "7th Title 5", "7th Title 6", "7th Title 7", "7th Title 8"]
    var Data7 =  ["7th Data 1", "7th Data 2", "7th Data 3", "7th Data 4", "7th Data 5", "7th Data 6", "7th Data 7", "7th Data 8"]

    var Title8 = ["8th Title 1", "8th Title 2", "8th Title 3", "8th Title 4", "8th Title 5", "8th Title 6", "8th Title 7", "8th Title 8"]
    var Data8 =  ["8th Data 1", "8th Data 2", "8th Data 3", "8th Data 4", "8th Data 5", "8th Data 6", "8th Data 7", "8th Data 8"]

    @IBOutlet var collection: UICollectionView!


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

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    func scrollViewDidScroll(scrollView: UIScrollView) {
        // Some logic here
    }


    override func setSelected(selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
    }

    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 8
    }

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("videoCell", forIndexPath: indexPath) as! MyCollectionViewCell

        switch (self.tag) {
            case 0:
                cell.title.text = self.Title1[indexPath.row]
                cell.data.text = self.Data1[indexPath.row]
                break

            case 1:
                cell.title.text = self.Title2[indexPath.row]
                cell.data.text = self.Data2[indexPath.row]
                break

            case 2:
                cell.title.text = self.Title3[indexPath.row]
                cell.data.text = self.Data3[indexPath.row]
                break

            case 3:
                cell.title.text = self.Title4[indexPath.row]
                cell.data.text = self.Data4[indexPath.row]
                break

            case 4:
                cell.title.text = self.Title5[indexPath.row]
                cell.data.text = self.Data5[indexPath.row]
                break

            case 5:
                cell.title.text = self.Title6[indexPath.row]
                cell.data.text = self.Data6[indexPath.row]
                break

            case 6:
                cell.title.text = self.Title7[indexPath.row]
                cell.data.text = self.Data7[indexPath.row]
                break

            case 7:
                cell.title.text = self.Title8[indexPath.row]
                cell.data.text = self.Data8[indexPath.row]
                break

            default:
                break
        }
        return cell
    }
}

Edit - 1

Link for project it may be helpful to understand the scenario

https://drive.google.com/file/d/0B0drBRiVjY71Tl9vUER6Zk44VFk/view?usp=sharing

Edit - 2 I have tried to implement below link but not able to do so

Synchronized horizontal scrolling of collection views in tableview rows

Thanks in advance

Answer 1

Thanks to @Impossible for help issue resolved now.

First I was set the tag cell?.collection.tag in cellForRowAtIndexPath of UITableView like

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    var cell = tableView.dequeueReusableCellWithIdentifier("cell") as? CategoryRow
    if cell == nil {
        cell = CategoryRow(style:UITableViewCellStyle.Subtitle, reuseIdentifier:"cell")
    }
    else {
    }
    cell!.tag = indexPath.section
    cell?.collection.tag = (100 * indexPath.section) + 1
    cell?.collection.reloadData()
    cell?.collection.delegate = self
    return cell!
}

Then I get view by using tag method viewWithTag inside scrollViewDidScroll like

func scrollViewDidScroll(scrollView: UIScrollView) {

    for var i = 0 ; i < 8 ; i++ {
        let cell2 = self.view .viewWithTag((100 * i) + 1) as? UICollectionView

        if cell2 != nil {
            cell2!.contentOffset = scrollView.contentOffset
        }
    }
}

Answer 2

Say that you have 2 collection views. What you can do is something like this.

// say cv0 and cv1 are outlets to two table views

func scrollViewDidScroll(scrollView: UIScrollView) {
    if scrollView == self.cv0 {
        self.cv1.contentOffset = self.cv0.contentOffset
    }
    else {
        if scrollView == self.tv1 {
            self.cv0.contentOffset = self.cv1.contentOffset
        }
    }
}

If you want to it for more collection views you can write a generic method to handle it. You can pass scrollView to this method and all other scroll views in the stack contentOffSet is set accordingly.