如何将选定的集合视图单元格发送到另一个视图控制器 (ios)

Question

我能够在我的集合视图中检测到选定的行(图像(，但我需要将其发送到另一个视图控制器。这是代码的一部分：

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as? CollectionViewCell {
        cell.cellImage.image = UIImage(named: images[indexPath.row])
        return cell
    } else {
        return CollectionViewCell()
    }
}
//Printinig the selected image ID in console
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
{
    SelectedItem = indexPath.row + 1
    print(SelectedItem)
}
//Navigate to MPViewController
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let DestViewController = segue.destination as!  MPViewController
    DestViewController.labelText = String(SelectedItem)
}
}

Answer 1

先初始化一个变量

var imageToPass： UIImage！

然后更新 didSelectItemAt func

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
{
    SelectedItem = indexPath.row + 1
    print(SelectedItem)
    self.imageToPass = UIImage(named: images[SelectedItem])
    performSegue(withIdentifier: "TargetVC", sender: imageToPass) //here you give the identifier of target ViewController
}

转到您的目标VC并初始化一个变量

var getImage： UIImage！

然后覆盖上一个 VC 中的函数

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "TargetVC" {
            if let targetVC = segue.destination as? TargetVC {
                if let imageToPass = sender as? UIImage {
                    TargetVC.getImage = imageToPass
                }
            }
        }
    }

Answer 2

//Printinig the selected image ID in console
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
{
    self.SelectedItem = indexPath.row + 1
    self.selectedImage = UIImage(named: images[indexPath.row]);
    print(SelectedItem)
}
//Navigate to MPViewController
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let DestViewController = segue.destination as!  MPViewController
    DestViewController.imageSelected = self.selectedImage;
    DestViewController.selectedItem = String(self.SelectedItem);
}

现在，在MPViewController中，您可以根据需要使用数据self.imageSelected和self.selectedItem。

Answer 3

在

目标类中获取一个实例变量，并在准备 segue 时设置它的值，然后在viewDidload将该字符串设置为标签的文本，例如，

 override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let DestViewController = segue.destination as!  MPViewController
    DestViewController.yourText = String(SelectedItem) 
 }

viewDidload

  yourLabel.text = yourText