ios - 显示在 Collection View Controller 之间选择的图像

Question

我在 First Collection View Controller 中有如下结构

struct Area{
    var name = String()
    var image = String()  
}
var area = [Area]()

并且在第二个 Collection View Controller

struct AreaSelected {
   var imageSelected = String()
}
 var areaSelected = [AreaSelected]()

我想在 Second Collection View Controller 中显示从 First Collection View Controller 中选择的图像。

所以我这样做是为了将它们导航到位于 didSelectItemAt indexPath 的 Second Collection View Controller

   let indexPaths = self.areaCV!.indexPathsForSelectedItems!
   var indexPath = indexPaths[0] as IndexPath
   let detailViewController = self.storyboard?.instantiateViewController(withIdentifier: "SVC") as? SecondViewController
   detailViewController?.areaSelected = [self.area[(indexPath as NSIndexPath).item]]

他们我得到以下编译器错误

Cannot convert value of type 'Area' to expected element type 'AreaSelected'

如何摆脱这个错误？

Answer 1

基本上

 let selectedArea = self.area[(indexPath as NSIndexPath).item]
 detailViewController?.areaSelected = [AreaSelected(imageSelected: selectedArea.name)]

PS:您在不同的 View Controller 中使用不同的(不兼容的)类型，因此绝对不能直接将其分配给彼此。

PSS:在 ViewController 之间的 CellSelected 上设置 segue 更容易、更清晰、更好，并在 func prepare(for segue:UIStoryboardSegue, sender: Any?) 中分配 areaSelected