CollectionView with images inside a TableViewCell - ios

Question

I want a TableView with 5 CollectionViews one by one. The Collection Views must display images that scroll horizontally. I followed this tutorial: https://ashfurrow.com/blog/putting-a-uicollectionview-in-a-uitableviewcell-in-swift/
But I want images scrolling in my CollectionView. I don't know how to do that.
Here is my sample code:
import UIKit
class ViewController1: UIViewController, UITableViewDataSource, UITableViewDelegate, UICollectionViewDelegateFlowLayout {
#IBOutlet var tableView: UITableView!
var images = [UIImage(named:"banner2"),UIImage(named:"banner1"),UIImage(named:"banner3"),UIImage(named:"banner4"),UIImage(named:"banner5")]
var storedOffsets = [Int: CGFloat]()
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell2", for: indexPath) as! Cell2
cell.frame = CGRect(x: 0, y: 28, width: 375, height: 202)
cell.myCollection.reloadData()
return cell
}
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
guard let tableViewCell = cell as? Cell2 else { return }
tableViewCell.setCollectionViewDataSourceDelegate(self, forRow: indexPath.row)
tableViewCell.collectionViewOffset = storedOffsets[indexPath.row] ?? 0
}
func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath) {
guard let tableViewCell = cell as? Cell2 else { return }
storedOffsets[indexPath.row] = tableViewCell.collectionViewOffset
}
}
extension ViewController1: UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return images.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell1", for: indexPath) as! Cell1
cell.image.image = images[(indexPath as NSIndexPath).row]
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print("Collection view at row \(collectionView.tag) selected index path \(indexPath)")
}
}
import UIKit
class Cell1: UICollectionViewCell {
#IBOutlet var image: UIImageView!
override init(frame: CGRect) {
super.init(frame: frame)
image.frame = CGRect(x: 0, y: 0, width: 175, height: 175) // Here I get exc_bad_instruction (code=exc_i386_invop subcode=0x0) warning
contentView.backgroundColor = UIColor.green
self.contentView.addSubview(image)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
}
import UIKit
class Cell2: UITableViewCell {
#IBOutlet var myCollection: UICollectionView!
override func awakeFromNib() {
myCollection.frame = CGRect(x: 0, y: 28, width: 375, height: 202)
}
}
extension Cell2 {
func setCollectionViewDataSourceDelegate<D: UICollectionViewDataSource & UICollectionViewDelegate>(_ dataSourceDelegate: D, forRow row: Int) {
self.myCollection.delegate = dataSourceDelegate
self.myCollection.dataSource = dataSourceDelegate
myCollection.tag = row
myCollection.setContentOffset(myCollection.contentOffset, animated:false) // Stops collection view if it was scrolling.
let layout = UICollectionViewFlowLayout.init()
layout.scrollDirection = .horizontal
layout.sectionInset = UIEdgeInsets(top: 5, left: 0, bottom: 5, right: 0)
layout.minimumInteritemSpacing = 0
layout.minimumLineSpacing = 0
layout.itemSize = CGSize(width: 182, height: 182)
myCollection = UICollectionView.init(frame: myCollection.frame, collectionViewLayout: layout)
myCollection.register(Cell1.self, forCellWithReuseIdentifier: "cell1")
self.contentView.addSubview(myCollection)
myCollection.reloadData()
}
var collectionViewOffset: CGFloat {
set { myCollection.contentOffset.x = newValue }
get { return myCollection.contentOffset.x }
}
}
A pink TableView (I set the colour) and black CollectionView(Again, I set the colour) I can't view my images or my CollectionViewCells that I have set as greenColor. And when touch in the pink part or try scroll I get the error: fatal error: unexpectedly found nil while unwrapping an Optional value with the warning - exc_bad_instruction (code=exc_i386_invop subcode=0x0)
Can someone tell me how I can do this? Thanks in advance
I use Xcode 8 and Swift 3.

Answer 1

I have snippet in OBJECTIVE- C , i think you have to convert into swift 3.0
Here is my code
You can try it
tablecell cellForRowAtIndexPath
static NSString *CellIdentifier = #"cell3";
CollectionViewTableCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[CollectionViewTableCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
cell.headerLabel.text = #"DISH TYPE";
cell.collectionView.delegate = self;
cell.collectionView.dataSource = self;
cell.collectionView.tag = indexPath.row;
[cell.collectionView reloadData];
and collection view cellForItemAtIndexPath
if(collectionView.tag == 4){
FIPhotoCollectionCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"foodTagCell" forIndexPath:indexPath];
NSDictionary *dic = [arrAmenities objectAtIndex:indexPath.row];
NSMutableDictionary *dic1 = [selectedAmenities objectAtIndex:indexPath.row];
NSURL *url = [NSURL URLWithString:[dic valueForKey:#"ImageURL"]];
[cell.photoImage sd_setImageWithURL:url placeholderImage:[UIImage imageNamed:#""]];
return cell;
}