Question

我有一个集合视图单元，可以将数据传递给详细的视图控制器。单击单元格后，它会进入具有更多详细信息的视图控制器。在单元格中，我有一个按钮，当单击按钮时，它还会分割成详细的视图控制器，但是单击单元格时会有一个不同的视图控制器。

这就是我的didselect功能。

  func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    }



    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "details" {


            self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.white]




            if let indexPaths = self.CollectionView!.indexPathsForSelectedItems{

                let vc = segue.destination as! BookDetailsViewController
                let cell = sender as! UICollectionViewCell
                let indexPath = self.CollectionView!.indexPath(for: cell)
                let post = self.posts[(indexPath?.row)!] as! [String: AnyObject]
                let Booked = post["title"] as? String
                let Authors = post["Author"] as? String
                let ISBNS = post["ISBN"] as? String
                let Prices = post["Price"] as? String
                let imageNames = post["image"] as? String
                let imagesTwo = post["imageTwo"] as? String
                let imagesThree = post["imageThree"] as? String
                let imagesFour = post["imageFour"] as? String
                let imagesFive = post["imageFive"] as? String
                vc.Booked = Booked
                vc.Authors = Authors
                vc.ISBNS = ISBNS
                vc.Prices = Prices
                vc.imageNames = imageNames
                vc.imagesTwo = imagesTwo
                vc.imagesThree = imagesThree
                vc.imagesFour = imagesFour
                vc.imagesFive = imagesFive

                print(indexPath?.row)

            }  }

        if segue.identifier == "UsersProfile" {

            if let indexPaths = self.CollectionView!.indexPathsForSelectedItems{

                let vc = segue.destination as! UsersProfileViewController
                let cell = sender as! UICollectionViewCell
                let indexPath = self.CollectionView!.indexPath(for: cell)
                let post = self.posts[(indexPath?.row)!] as! [String: AnyObject]
                let username = post["username"] as? String
                let userpicuid = post["uid"] as? String
                vc.username = username
                vc.userpicuid = userpicuid


                print(indexPath?.row)

            }}}

如果segue ==用户的个人资料我在let cell =行中收到错误。单元格中的我的按钮是在cellForItemAt集合视图函数

中创建的

    let editButton = UIButton(frame: CGRect(x: 106, y: 171, width: 36, height: 36))

    editButton.addTarget(self, action: #selector(editButtonTapped), for: UIControlEvents.touchUpInside)
    editButton.tag = indexPath.row
    print(indexPath.row)
    editButton.isUserInteractionEnabled = true

    cell.addSubview(editButton)

当我单击单元格时，它完美地工作并将我分成详细的视图控制器但是当我单击单元格内的按钮时，我收到错误。

这是我的editTappedButton函数

    @IBAction func editButtonTapped() -> Void {
            print("Hello Edit Button")

performSegue(withIdentifier: "UsersProfile", sender: self)

        }

Answer 1

很明显，你正在遭遇崩溃，因为你的按钮操作正在调用xmlns:local="clr-namespace:WpfTests_2"现在正在传递的传感器performSegue(withIdentifier: "UsersProfile", sender: self)表示当前控制器的引用而不是self你的需要获取该单元格的indexPath并将其传递，现在UICollectionViewCell将发件人转为prepareForSegue而不是IndexPath。

首先将UICollectionViewCell替换为低于一个

editButtonTapped

现在@IBAction func editButtonTapped(_ sender: UIButton) -> Void { print("Hello Edit Button") let point = sender.superview?.convert(sender.center, to: self.tableView) if let indexPath = self.tableView.indexPathForRow(at: point!) { performSegue(withIdentifier: "UsersProfile", sender: indexPath) } }标识为prepareForSegue，将UsersProfile强制转换为sender，或者只是将我的条件替换为我的条件。

IndexPath

使用单元格中的按钮查看详细视图控制器

1 个答案: