设置 TableView 单元格标签结构的数组

Question

我的结构有两个属性，一个是carName，它的类型是字符串，另一个是carModel，它是一个字符串数组，我创建了CollectionView 的CollectionView，然后单击特定的CollectionView 单元格，主视图控制器（即CollectionView）转到另一个TableView，在该视图中我想设置carModel 的标签。这里有图片以便更好地理解：CollectionView -> TableView 从最后一张图片你可以看到我的代码不起作用。预期结果：image3。我尝试了循环、开关和大小写，但似乎不起作用。有什么解决办法吗？

struct Cars {
    let carName:String
    let carModel:[String]
}
let 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"])
]

///TableViewCell code
    @IBOutlet var lbl: UILabel!
    func configure(with cars:Cars){
        for i in 0..<cars.carModel{
            lbl.text = cars.carModel[i]    // Error is here
        }
    }

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)
        a = indexPath.row
        
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell:TableViewCell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
        print(indexPath.row)
        cell.configure(with: cars[a])
        return cell
    }
    }

Answer 1

这是错误的方法 首先你已经设置了

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return cars.count
}
 func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let vc = storyboard?.instantiateViewController(identifier: "TableViewController") as? TableViewController
    vc.carsArray = cars[indexPath.row].carModels
            self.navigationController?.pushViewController(vc!, animated: true)
           
}

你应该像这样在 tableviewcontroller 上创建一个 var carsArray

class TableViewContrller {
  var carsArray:[String] = [] {
     didSet { tableView.reloadData()
    }
  }
 func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return carsArray.count
  }
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell:TableViewCell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
    print(indexPath.row)
    cell.configure(with: carsArray[indexPath.row])
    return cell
}

Answer 2

你的结构

struct Cars {
    let carName:String
    let carModel:[String]
}

第一个 ViewController - CollectinViewControler 类

class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
    
    let 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"])
    ]
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        self.cars.count
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellid", for: indexPath as IndexPath) as! YourCollectionViewCell
        cell.label.text = self.cars[indexPath.row].carName
        cell.backgroundColor = UIColor.cyan
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let vc = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "TableViewController") as? SecondViewController
        vc?.carModel = self.cars[indexPath.row].carModel
        self.navigationController?.pushViewController(vc!, animated: true)
    }
}

您的第二个视图控制器 - TableView

class SecondViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

    var carModel: [String]?
    override func viewDidLoad() {
    super.viewDidLoad()
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        self.carModel?.count ?? 0
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell:UITableViewCell = tableView.dequeueReusableCell(withIdentifier: "TableViewCell") as! UITableViewCell
        cell.textLabel?.text = self.carModel?[indexPath.row]
        return cell
    }
}