在 Cell 外获取 CollectionViewCell 的 IndexPath

Question

首先我是swift的新手，所以要温柔。我在获取单元格外部单元格的 indexPath 时遇到问题。我想获取函数的索引路径并使用它将内容发送到另一个视图。该图像是在单元格中以编程方式创建的，它有一个发送到此函数的点击手势识别器（其中“myIndex”被定义为 Int : var myIndex = 0）：

// tap image to go at the indexpath of the user
func imageTapped(tapGestureRecognizer: UITapGestureRecognizer) {
   print("image tapped")

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let secondViewController = storyboard.instantiateViewController(withIdentifier: "patientProfile") as! PatientProfileVC
    secondViewController.userID = posts[myIndex].userID
    secondViewController.patientName = posts[myIndex].author

    print("Passed data to the other view")

    self.show(secondViewController, sender: self)


}

我知道我可以在 IndexPath 中使用 didSelectItem，我也有 myIndex 的声明，但我有一些东西会从那里的 segue 触发：

//standard functon for item selected
override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    //get the index of the cell
    myIndex = indexPath.row

    print("Cell is selected")

    //perform the segue
    self.performSegue(withIdentifier: "CommentsVC", sender: self)
    print(myIndex)

}

我对 segue 的表现是这样的：` override

func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    print("Segue Initiated")
    feed.navigationItem.title = nil

    //if segue.destination is CommentsFullVC{
        print("Comments segue initiated")
        let secondViewController = segue.destination as! CommentsFullVC
        secondViewController.questionData = posts[myIndex].postContent
        secondViewController.authorName = posts[myIndex].author
        secondViewController.date = posts[myIndex].normalDate
        secondViewController.profileImagePath = posts[myIndex].pathToImage
        secondViewController.typeOfClinic = posts[myIndex].clinic
        secondViewController.postID = posts[myIndex].postID
        secondViewController.followersForPost = posts[myIndex].followers

}

所以我的问题是，如何在不使用 prepareForSegue 的情况下将这 2 个字段传递给另一个视图？我为此苦苦挣扎了 20 个小时，但仍然无法弄清楚。

secondViewController.userID = posts[myIndex].userID
secondViewController.patientName = posts[myIndex].author

更新：由于 Jose 的回答，它开始工作了，现在它看起来像这样......以防有人遇到与我相同的问题。

 // tap image to go at the indexpath of the user
func imageTapped(tapGestureRecognizer: UITapGestureRecognizer) {
   print("image tapped")


    let pointInCollectionView = tapGestureRecognizer.location(in: collectionView)
    let indexPath = collectionView?.indexPathForItem(at: pointInCollectionView)
    print(indexPath!)

    // this one works - show segue
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let secondViewController = storyboard.instantiateViewController(withIdentifier: "patientProfile") as! PatientProfileVC
    secondViewController.userID = posts[(indexPath?.row)!].userID
    secondViewController.patientName = posts[(indexPath?.row)!].author

    print("Passed data to the other view")

    self.show(secondViewController, sender: self)


}

Answer 1

获取 tapGestureRecognizer 在 collectionView 中的位置，然后获取 indexPath 在给定位置的位置

let pointInCollectionView = tapGestureRecognizer.location(in: collectionView)
let indexPath = collectionView.indexPathForItem(at: pointInCollectionView)

Answer 2

如果你的代码像下面这样写，那么试试这个

行方法的集合视图单元格

cell.image = indexPath.row
let tap = UITapGestureRecognizer.init(target: self, action: #selector(imageTapped(_:)))
tap.accessibilityElements = [indexPath]
cell.image.addGestureRecognizer(tap)

你的函数在集合视图之外

func imageTapped (_ sender:UITapGestureRecognizer) {
     let index = sender.accessibilityElements?.first as! IndexPath   
     print(index.row)
     myIndex = index.row
}

Answer 3

我认为这对于单元格的代表来说很容易，但有点复杂。

简单的答案应该是将索引存储在点击图像的 imageView 的 "tag" 属性中，然后从 gestureRecognizer 中提取您可以在创建 imageView 的位置添加标签，恢复标签的代码如下所示：

func imageTapped(tapGestureRecognizer: UITapGestureRecognizer) {
    print("image tapped")
    var myIndex = 0
    if let imageView = tapGestureRecognizer.view {
        myIndex = imageView.tag
    }

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let secondViewController = storyboard.instantiateViewController(withIdentifier: "patientProfile") as! PatientProfileVC
    secondViewController.userID = posts[myIndex].userID
    secondViewController.patientName = posts[myIndex].author

    print("Passed data to the other view")

    self.show(secondViewController, sender: self)


}

在 Cell 外获取 CollectionViewCell 的 IndexPath

Get IndexPath of CollectionViewCell outside of Cell

ios

swift

swift3

indexpath