我最近将我的代码转换为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IndexPath而不是NSIndexPath.但是仍然在方法定义中,将IndexPath类型转换为NSIndexPath.即
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
}
任何人都可以告诉我为什么indexPath被转换为NSIndexPath.
解决方法
没有理由将IndexPath转换为NSIndexPath.
Swift 3覆盖类型IndexPath具有属性
Swift 3覆盖类型IndexPath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迁移者并不完美.
