accessing struct massive in UITableViewCell - swift

Question

I've created an collection view with carName's there are 5 of them, after clicking for example Mercedes(one of the collection view's cell) I want to set label text its own values:carModel ( carName and carModel are both same struct properties ) in Table view which is already created by me, but I cant access carModel array
I tried for loop but it returns an error
for i in cars.carModel {
lbl.text = cars.carModel[i]
}
any solution will be appericated
// data source file
struct Cars {
let carName:String
let carModel:[String]
}
let cars:[Cars] = [
Cars(carName: "Mercedes", carModel: ["S Class","A Class", "B Class"]),
Cars(carName: "BMW", carModel: ["X5","X6","X7"]),
Cars(carName: "Ford", carModel: ["Fuison","Focus","Mustang"]),
Cars(carName: "Toyota", carModel: ["Camry", "Corolla"]),
Cars(carName: "Hyundai", carModel: ["Elantra"])
]
// table view cell file
class TableViewCell: UITableViewCell {
#IBOutlet var lbl: UILabel!
func configure(with cars:Cars){
lbl.text = cars.carName
}
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}
// mainviewcontroller
class ViewController: UIViewController {
#IBOutlet weak var collectionView: UICollectionView!
//#IBOutlet weak var tableView
override func viewDidLoad() {
super.viewDidLoad()
collectionView.dataSource = self
collectionView.delegate = self
}
}
extension ViewController: UICollectionViewDataSource{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return cars.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionViewCell", for: indexPath) as? CollectionViewCell
cell?.setup(with: cars[indexPath.row])
return cell!
}
}
extension ViewController:UICollectionViewDelegate,UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let vc = storyboard?.instantiateViewController(identifier: "TableViewController") as? TableViewController
self.navigationController?.pushViewController(vc!, animated: true)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:TableViewCell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
cell.configure(with: cars[indexPath.row])
return cell
}
}
Here's my simulator:
img1
img2
what I want:expected result img

Answer 1

When you defined your UITableViewDataSource you set the number of rows in function method to return a constant (5). In cellForRowAt function you setup the cell with a Cars object.
I think you are mixing what data should be use for table view's datasource.
For collection view data source you have to:
Number of rows in section function should return: cars.count
Cell for item at function must configure CollectionViewCell with a Cars instance
I think all you are missing is saving which cell is being selected in collection view to use this to supply correct data to table view.
In collection view delegate when user taps on a cell you can either save the selected indexPath or Cars instance, this will be use by table view delegate. Let's call it selectedCar.
Then for table view data source you have to:
Number of rows in section function should return: selectedCar.carModel.count
Cell for item at function must configure TableViewCell with a CarModel instance (which is a String)
I created a small project in Github as a sample, is working as expected. Check it out. Hope this helps you. Sample video in Youtube.
Note: Setting datasource and delegate for tableView or collectionView in ViewController is not the best way to organize code but for sample code is ok.