如何为我的收藏视图单元格提供点击功能?

Question

我想让它在我点击 CollectionView 单元格时，它会转到另一个视图。我还想将用户 ID 传递给此视图，以便查询数据库。这是我到目前为止实现的：

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

let cell = collectionview.dequeueReusableCell(withReuseIdentifier: "userCell", for: indexPath) as! UserCell
print(user[indexPath.row].imagePath!)

cell.userImage.sd_setImage(with: URL(string: user[indexPath.row].imagePath!))
cell.nameLabel.text = user[indexPath.row].username
cell.userID = user[indexPath.row].userID
let destinationVC = ProfileViewController()
destinationVC.sentUserID = user[indexPath.row].userID!
// Let's assume that the segue name is called playerSegue
// This will perform the segue and pre-load the variable for you to use
//destinationVC.performSegue(withIdentifier: "toProfileFromSearch", sender: self)

cell.addButtonTapAction = {
// implement your logic here, e.g. call preformSegue()
self.performSegue(withIdentifier: "toProfileFromSearch", sender: self)
}
//cell.userImage.downloadImage(from: self.user[indexPath.row].imagePath!)
//checkFollowing(indexPath: indexPath)

return cell
}

这是在每个单元格的单独创建中。当我单击搜索区域中的用户配置文件时，没有任何反应。

我遵循了其他堆栈溢出问题来达到这一步。任何人都可以为其他也需要这个的人制定完整的解决方案吗？

Answer 1

您可以使用didSelectItemAt函数，请检查此

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let VC1 = self.storyboard!.instantiateViewController(withIdentifier: "IDYOURVIEW") as! ProfileViewController
VC1.sentUserID = user[indexPath.row].userID!
self.navigationController?.pushViewController(VC1, animated: true)
}

如果您使用的是 segue

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
self.performSegue(withIdentifier: "toProfileFromSearch", sender: user[indexPath.row].userID!)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
if segue.identifier == "toProfileFromSearch"
{
let vc = segue.destination as? ProfileViewController
if let id = sender as! String
{
vc?.sentUserID = id
}
}
}

Answer 2

还有另一种更好的方法来使用它来处理这个问题protocol

protocol UserCellTapedDelegate: AnyObject {
func didTapButton(_ cell: UserCell, didSelectItemAt id: Int)
}

那么你的单元格会像：

class UserCell: UICollectionViewCell {
public var userID: Int!
public weak var delegate: UserCellTapedDelegate?

@objc private func addButtonTapAction() {
delegate?.didTapButton(self, didSelectItemAt: userID)
}
}

userID：用于存储用户 ID。

delegate：在单元格中使用可选的弱(就内存管理而言(委托引用。

addButtonTapAction功能来处理按钮的目标/或点击任何UIView上的手势。

---

下一步是返回到您的 UIViewController 并符合自定义委托：

extension ViewController: UserCellTapedDelegate  {
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionview.dequeueReusableCell(withReuseIdentifier: "userCell", for: indexPath) as! UserCell
...
cell.userID = user[indexPath.row].userID!
cell.delegate = self
return cell
}
func didTapButton(_ cell: UserCell, didSelectItemAt id: Int) {
self.performSegue(withIdentifier: "toProfileFromSearch", sender: id)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "toProfileFromSearch" {
let vc = segue.destination as! ProfileViewController
if let id = sender as! String {
vc.sentUserID = id
}
}
}
}

希望这对你😊有帮助