Pass data from UITableView to UICollectionView - ios

Question

I want to get a JSON response and display data in my viewcontroller.
I have this JSON response:
{"status":1,"data":{"blocks":[{"name":"CustomBlock","description":"CustomDescription","items":[1]}], "items":[{"id:"1", name: "testgame"}]}
I have blocks with name, description, and array of items. Also, all items is passing here with the key "items"
I have created this tableview class
BlocksTableView.swift
class BlocksTableView : UITableView, UITableViewDataSource,
UITableViewDelegate
{
var blocks = [Block]()
var items : BlockItem!
override func awakeFromNib() {
self.delegate = self
self.dataSource = self
self.loadBlocks()
}
func loadBlocks()
{
guard let url = URL(string : "myURL") else { return }
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else { return }
do {
let response = try JSONDecoder().decode(APIResponse.self, from: data)
self.blocks = response.data.blocks;
self.items = response.data.items;
DispatchQueue.main.async {
self.reloadData()
}
} catch let jsonErr {
print(jsonErr)
}
}.resume()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return blocks.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "BlockCell") as? BlockCell else { return UITableViewCell() }
cell.blockName.text = blocks[indexPath.row].name
cell.blockDescription.text = blocks[indexPath.row].description
cell.gameCollectionView.reloadData()
return cell
}
}
Now I want to display items in collectionview inside tableviewcell, but I have no idea how to do this. Since each block has different count of items, I need to pass blocks and items variables to my CollectionViewClass, right? But how to do this properly?
Here is my collectionviewclass
class GameCollectionView : UICollectionView,
UICollectionViewDataSource, UICollectionViewDelegate
{
override func awakeFromNib() {
self.delegate = self
self.dataSource = self
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
//here i need to return number of items in current block, something like blocks[0].items.count
return 0
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GameCollectionCell", for: indexPath) as? GameCollectionCell else { return
UICollectionViewCell()
}
return cell
}

Answer 1

You can try
class BlocksTableView : UITableView, UITableViewDataSource,UITableViewDelegate,UICollectionViewDataSource, UICollectionViewDelegate {
var blocks = [Block]()
var items : BlockItem!
override func awakeFromNib() {
self.delegate = self
self.dataSource = self
self.loadBlocks()
}
func loadBlocks()
{
guard let url = URL(string : "myURL") else { return }
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else { return }
do {
let response = try JSONDecoder().decode(APIResponse.self, from: data)
self.blocks = response.data.blocks;
self.items = response.data.items;
DispatchQueue.main.async {
self.reloadData()
}
} catch let jsonErr {
print(jsonErr)
}
}.resume()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return blocks.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "BlockCell") as? BlockCell else { return UITableViewCell() }
cell.blockName.text = blocks[indexPath.row].name
cell.blockDescription.text = blocks[indexPath.row].description
cell.gameCollectionView.delegate = self
cell.gameCollectionView.dataSource = self
cell.gameCollectionView.tag = indexPath.row
cell.gameCollectionView.reloadData()
return cell
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return blocks[collectionView.tag].items.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GameCollectionCell", for: indexPath) as? GameCollectionCell else { return
UICollectionViewCell() }
// here use blocks[collectionView.tag].items[indexPath.row] for each item
return cell
}
}