无法在 CollectionViewCell 的按钮中使用参数添加目标 (Swift 4)

Question

我的 CollectionViewCell 中有一个按钮，我想在点击该按钮时触发 UIActivityViewController（通过 URL）。

我正在尝试将目标（带参数）添加到 CollectionViewCell 中的按钮，但它似乎不起作用，这是我的代码：

  override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: verticalCellId, for: indexPath) as! VerticalCellId

    if let articleURL = self.card?[indexPath.item]._uRLAddress {

    cell.shareButton.addTarget(self, action: #selector(shareButtonPressed(sharedURL: articleURL)), for: .touchUpInside)

   }

}


  @objc func shareButtonPressed(sharedURL: String) {

    let shareText = sharedURL
    let activityViewController : UIActivityViewController = UIActivityViewController(activityItems: [shareText], applicationActivities: nil)
    activityViewController.popoverPresentationController?.sourceView = self.view
    self.present(activityViewController, animated: true, completion: nil)
}

错误是：Argument of '#selector' does not refer to an '@objc' method, property, or initializer

在没有参数传递的情况下效果很好，像这样：

 override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: verticalCellId, for: indexPath) as! VerticalCellId

    if let articleURL = self.card?[indexPath.item]._uRLAddress {

    cell.shareButton.addTarget(self, action: #selector(shareButtonPressed), for: .touchUpInside)

   }

}

@objc func shareButtonPressed() {

    let shareText = NSLocalizedString("Share our app with friends.", comment: "share")
    let activityViewController : UIActivityViewController = UIActivityViewController(activityItems: [shareText], applicationActivities: nil)
    activityViewController.popoverPresentationController?.sourceView = self.view
    self.present(activityViewController, animated: true, completion: nil)
}

如有任何建议，我们将不胜感激。

Answer 1

您不能在target/action选择器中传递任意参数。

支持的形式有

无参数
一个参数必须是动作的发送者(shareButtonPressed(_ sender: UIButton))
一些 UIControl 项目还允许额外的 UIControlEvents 参数。

无法在 CollectionViewCell 的按钮中使用参数添加目标 (Swift 4)

Cannot add target with parameters in CollectionViewCell's button (Swift 4)

uicollectionviewcell

swift

addtarget