Ios Swift 3.0中的NSIndexPath和IndexPath

我最近将代码转换为Swift 3.0。我的集合视图和表视图数据源方法现在在其方法签名中包含

indepath

，而不是

nsindepath

。但仍然在方法定义中，它是将indepath类型转换为nsindepath的。i、 e

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
    {
        let cell : NNAmenitiesOrFurnishingCollectionViewCell = self.amenitiesOrFurnishingCollectionView.dequeueReusableCell(withReuseIdentifier: "NNAmenitiesOrFurnishingCollectionViewCell", for: indexPath) as! NNAmenitiesOrFurnishingCollectionViewCell
        cell.facilityImageName = self.facilityArray[(indexPath as NSIndexPath).row].imageName
        cell.facilityLabelString = self.facilityArray[(indexPath as NSIndexPath).row].labelText
        return cell
    }

---

有谁能告诉我为什么

indepath

被类型转换为

nsindepath

这里没有理由将

indepath

转换为

nsindepath

。 Swift 3覆盖类型

indepath

具有属性

/// The section of this index path, when used with `UITableView`.
///
/// - precondition: The index path must have exactly two elements.
public var section: Int

/// The row of this index path, when used with `UITableView`.
///
/// - precondition: The index path must have exactly two elements.
public var row: Int

您可以直接访问：

    cell.facilityImageName = self.facilityArray[indexPath.row].imageName
    cell.facilityLabelString = self.facilityArray[indexPath.row].labelText

---

显然，Xcode migrator的工作并不完美。

转换的原因是，如果要将IndexPath发送到需要NSIndexPath作为参数的函数，或者至少需要在Swift 4中这样做。