Question

所以我在集合视图中有一个单元格，里面有3个按钮。为了使用这些按钮触发代码，我实现了一个自定义委托。现在代码被触发，但我不知道代码触发了哪个单元格。我怎样才能最好地实现这一点？这是我的一些代码。协议：

protocol OverViewDelegate {
func registerButtonClicked()
func evaluateButtonClicked()
func overviewButtonClicked()
}

cellForItemAt：

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "sessionCell", for: indexPath) as? SessionCollectionViewCell
    let session: SessionModel
    session = DebugData.shared.sessionArray[indexPath.row]

    cell?.sessionImage.image = #imageLiteral(resourceName: "carControl")
    cell?.sessionNameLabel.text = session.name
    cell?.sessionLocationLabel.text = session.location
    cell?.overViewDelegate = self

    return cell!
}

细胞：

import UIKit

导入IBAnimatable

@IBOutlet weak var sessionImage: UIImageView!
@IBOutlet weak var sessionNameLabel: UILabel!
@IBOutlet weak var sessionLocationLabel: UILabel!
@IBOutlet weak var sessionRegisterButton: AnimatableButton!
@IBOutlet weak var sessionOverviewButton: AnimatableButton!
@IBOutlet weak var sessionEvaluateButton: AnimatableButton!

var overViewDelegate: OverViewDelegate?

@IBAction func registerButtonClicked(_ sender: Any) {
    overViewDelegate?.registerButtonClicked()
}

@IBAction func overviewButtonClicked(_ sender: Any) {
    overViewDelegate?.overviewButtonClicked()
}

@IBAction func evaluateButtonClicked(_ sender: Any) {
    overViewDelegate?.evaluateButtonClicked()
}

任何帮助都会得到满足。

Answer 1

在Cell类中传递indexPath值返回按钮单击功能

上的indexPath

协定： -

protocol OverViewDelegate { func registerButtonClicked(_ indexPath : IndexPath) func evaluateButtonClicked(_ indexPath : IndexPath) func overviewButtonClicked(_ indexPath : IndexPath) }

cellForItemAt：

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "sessionCell", for: indexPath) as? SessionCollectionViewCell let session: SessionModel session = DebugData.shared.sessionArray[indexPath.row] cell?.sessionImage.image = #imageLiteral(resourceName: "carControl") cell?.sessionNameLabel.text = session.name cell?.sessionLocationLabel.text = session.location cell?.overViewDelegate = self cell?.indexPath = indexPath return cell! }

<强>细胞

@IBOutlet weak var sessionImage: UIImageView! @IBOutlet weak var sessionNameLabel: UILabel! @IBOutlet weak var sessionLocationLabel: UILabel! @IBOutlet weak var sessionRegisterButton: AnimatableButton! @IBOutlet weak var sessionOverviewButton: AnimatableButton! @IBOutlet weak var sessionEvaluateButton: AnimatableButton! var overViewDelegate: OverViewDelegate? var indexPath : IndexPath? @IBAction func registerButtonClicked(_ sender: Any) { overViewDelegate?.registerButtonClicked(indexPath) } @IBAction func overviewButtonClicked(_ sender: Any) { overViewDelegate?.overviewButtonClicked(indexPath) } @IBAction func evaluateButtonClicked(_ sender: Any) { overViewDelegate?.evaluateButtonClicked(indexPath) }

使用以下方法获取单元格： -

let cell = tableView.cellForRow(at: indexPath)

Answer 2

最好的方法是在协议方法中发回单元格.. 例如

protocol OverViewDelegate {
  func registerButtonClicked(cell: SessionCollectionViewCell)
  func evaluateButtonClicked(cell: SessionCollectionViewCell)
  func overviewButtonClicked(cell : SessionCollectionViewCell)

}

并点击按钮

@IBAction func overviewButtonClicked(_ sender: Any) {
    overViewDelegate?.overviewButtonClicked(cell: self)
}

并在实现委托方法时使用viewcontroller

func overviewButtonClicked(cell: SessionCollectionViewCell) {
     // here you get the cell and all the properties you want to access of that cell and also

    if let indexPath = self.tableView.indexPath(for: cell) {
       // do what you want to do
    }
 }

Answer 3

在您的单元格中放置一个变量，并将会话数据模型实例保存在cellForRowAt中。然后更新您的委托方法并为每个方法添加会话参数。

所以你按下每个按钮的数据模型实例

Answer 4

您可以使用PtrToStringAuto

中的按钮标记进行查看

cellForItemAt:

Answer 5

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "sessionCell", for: indexPath) as? SessionCollectionViewCell
let session: SessionModel
session = DebugData.shared.sessionArray[indexPath.row]

cell.sessionRegisterButton.tag = indexPath.row  // --- add this
..........

cell?.sessionImage.image = #imageLiteral(resourceName: "carControl")
cell?.sessionNameLabel.text = session.name
cell?.sessionLocationLabel.text = session.location
cell?.overViewDelegate = self


return cell!
}
@IBAction func registerButtonClicked(_ sender: Any) {
let cellIndex = sender.tag   // this will be the cell index
overViewDelegate?.registerButtonClicked()

}

Answer 6

在cellForItemAt:方法中，您可以指定tag值，当点击按钮时，您可以检查sender.tag以检查点按了哪个按钮。

Answer 7

您可以通过为cellForItemAt中的所有按钮指定标记来实现它：如下所示

cell.sessionRegisterButton.tag = indexPath.item
cell.sessionOverviewButton.tag = indexPath.item
cell.sessionEvaluateButton.tag = indexPath.item

通过以下方式获取索引：

@IBAction func registerButtonClicked(_ sender: Any) {
    let senderButton : UIButton = sender as! UIButton
    let index : Int = senderButton.tag
    overViewDelegate?.registerButtonClicked()
}

@IBAction func overviewButtonClicked(_ sender: Any) {
    let senderButton : UIButton = sender as! UIButton
    let index : Int = senderButton.tag
    overViewDelegate?.overviewButtonClicked()
}

@IBAction func evaluateButtonClicked(_ sender: Any) {
    let senderButton : UIButton = sender as! UIButton
    let index : Int = senderButton.tag
    overViewDelegate?.evaluateButtonClicked()
}

iOS如何知道哪个按钮按下了CollectionView与自定义委托

7 个答案: