我为我的应用程序提供了此自定义滚动视图，并且我的主委托类中有一个数据数组。我也有一个单独的扩展名（在同一文件中）来处理数据，但是我似乎无法访问带有两个错误的数据Use of unresolved identifier data：
class HomeViewController: UIViewController {
fileprivate let data = [
CustomData(title: "Test", image: #imageLiteral(resourceName: "splash_icon"), url: "clipifyapp.com"),
CustomData(title: "Test2", image: #imageLiteral(resourceName: "done-button"), url: "clipifyapp.com"),
CustomData(title: "Test2", image: #imageLiteral(resourceName: "notificationIcon"), url: "clipifyapp.com")
]
}
extension UIViewController: UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {
public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: collectionView.frame.width/2.5, height: collectionView.frame.width/2)
}
public func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return data.count // ERROR ONE
}
public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CustomCell
cell.data = self.data[indexPath.row] // ERROR TWO
return cell
}
}
我是否缺少明显的东西？
最佳答案
data仅在HomeViewController中可用，在基类UIViewController中不可用
更换
extension UIViewController: UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {
与
extension HomeViewController: UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {