Question

我有我的CardSensors类，该类具有一个用另一个XIB填充的collectionView

class CardSensors: UIView {
    @IBOutlet weak var botName: UILabel!
    @IBOutlet weak var sensorsCollectionView: UICollectionView!
    var sensors = [[String: Any]]()

    var viewModel: NewsFeedViewModel! {
        didSet {
            setUpView()
        }
    }

    func setSensors(sensors: [[String: Any]]){
        self.sensors = sensors
    }

    static func loadFromNib() -> CardSensors {
        return Bundle.main.loadNibNamed("CardSensor", owner: nil, options: nil)?.first as! CardSensors
    }

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    func setupCollectionView(){
        let nibName = UINib(nibName: "SensorCollectionViewCell", bundle: Bundle.main)
        sensorsCollectionView.register(nibName, forCellWithReuseIdentifier: "SensorCollectionViewCell")
    }

    func setUpView() {
        botName.text = viewModel.botName
    }

}

extension CardSensors: UICollectionViewDataSource {

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "SensorCollectionViewCell", for: indexPath) as? SensorCell else {
            return UICollectionViewCell()
        }

        cell.dateLabel.text = sensors[indexPath.row]["created_at"] as? String
        cell.sensorType.text = sensors[indexPath.row]["type"] as? String
        cell.sensorValue.text = sensors[indexPath.row]["value"] as? String
        cell.sensorImage.image = UIImage(named: (sensors[indexPath.row]["type"] as? String)!)

        return cell
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

        return sensors.count
    }

}

我正在像这样的另一个类中创建一个对象，但是我希望它调用collectionView的方法来加载信息。

let sensorView = CardSensors.loadFromNib()
sensorView.sensors = sensores
sensorView.setupCollectionView()

问题在于collectionView方法永远不会被调用。我该怎么做才能从其他班级给他们打电话？

Answer 1

您需要设置数据源

 sensorsCollectionView.register(nibName, forCellWithReuseIdentifier: "SensorCollectionViewCell")
 sensorsCollectionView.dataSource = self
 sensorsCollectionView.reloadData()

然后在vc中，使其成为实例变量

var sensorView:CardSensors!

sensorView = CardSensors.loadFromNib()
sensorView.sensors = sensores
sensorView.setupCollectionView()

如何执行另一个类的collectionView方法？

1 个答案: