ios - UICollectionView Controller 和在 Prepare for Segue 中传递 CloudKit 数据

Question

我已经成功地使用 CloudKit 记录中的数据和图像填充了 UICollectionView Controller ，但是我在将所选单元格传递给详细信息 UIViewController 时遇到了问题。到目前为止，这是我的代码 -

override func numberOfSections(in collectionView: UICollectionView) -> Int {
    return 1
}


override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return self.staffArray.count

}

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> StaffCVCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! StaffCVCell

    let staff: CKRecord = staffArray[indexPath.row]

    let iconImage = staff.object(forKey: "staffIconImage") as? CKAsset
    let iconData : NSData? = NSData(contentsOf:(iconImage?.fileURL)!)


    let leaderNameCell = staff.value(forKey: "staffName") as? String
    cell.leaderNameLabel?.text = leaderNameCell

    cell.leaderImageView?.image = UIImage(data:iconData! as Data);
    return cell 
}


func prepare(for segue: UIStoryboardSegue, sender: StaffCVCell) {
    if segue.identifier == "showStaffDetail" {
        let destinationController = segue.destination as! StaffDetailsVC
        if let indexPath = collectionView?.indexPath {
            let staffLeader: CKRecord = staffArray[indexPath.row]
            let staffID = staffLeader.recordID.recordName
            destinationController.staffID = staffID
        }
    }
}

问题出现在行-

让 staffLeader: CKRecord = staffArray[indexPath.row]

出现错误的地方-

Value of type '(UICollectionViewCell) -> IndexPath?' has no member 'row'

我尝试用单元格替换行，但这只会出现另一个错误 -

Value of type '(UICollectionViewCell) -> IndexPath?' has no member 'cell'

我确定我缺少一些基本的东西，但看不到它。非常感谢任何指点。

Answer 1

如果您的 segue 是通过触摸单元格触发的，您需要按照以下代码行进行操作:

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

    if segue.identifier == "showStaffDetail" {

        let destinationController = segue.destination as! StaffDetailsVC

        // Find the correct indexPath for the cell that triggered the segue
        // And check that the sender is, in fact, a StaffCVCell
        if let indexPath = collectionView?.indexPath(for: sender), let sender = sender as? StaffCVCell {

            // Get your CKRecord information
            let staffLeader: CKRecord = staffArray[indexPath.item]
            let staffID = staffLeader.recordID.recordName

            // Set any properties needed on your destination view controller
            destinationController.staffID = staffID
        }
    }
}

请注意，我已将方法签名改回标准方法签名。