我正在尝试与CollectionView中的单元进行交互，但是我什么也无法工作。
起初，我只是想通过单击单元格将某些内容打印到日志中。那没用。我通过声明“ didSelectItemAt”函数来做到这一点。
接下来，我在该单元格中添加了一个按钮，并添加了IBAction以将某些内容打印到日志中，但这也不起作用。
我尝试将collectionview.isUserInteractionEnabled = true添加到viewDidLoad（）方法中，但这没有用。我还检查了情节提要
我正在通过添加数据源和委托
collectionview.delegate = self
collectionview.dataSource = self
我还尝试在viewDidLoad中添加UITapGestureRecognizer，但这只是使我的应用在加载视图时崩溃。
我可以与其他collectionview进行交互，但是我不能与该collection view进行交互。我不确定滚动是否可行，因为到目前为止该集合视图中仅加载一个单元格。
有人对我能做什么或如何正确实现UITapGestureRecognizer有任何想法吗？
这是CollectionView的完整代码：
import UIKit
import Firebase
import SwiftKeychainWrapper
import SwiftUI
import FirebaseUI
class UserViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
@IBOutlet weak var collectionview: UICollectionView!
var user = [User]()
var following = [String]()
var userStorage: StorageReference!
var ref : DatabaseReference!
override func viewDidLoad() {
super.viewDidLoad()
collectionview.delegate = self
collectionview.dataSource = self
collectionview.isUserInteractionEnabled = true
// self.collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "UserCell")
retrieveUsers()
// let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIInputViewController.dismissKeyboard))
// tap.cancelsTouchesInView = false
// collectionview.addGestureRecognizer(tap)
}
@IBAction func buttonPress(_sender: Any){
print("fuck you")
}
func retrieveUsers() {
let uid = Auth.auth().currentUser!.uid
let ref = Database.database().reference().child("posts")
let uids = Database.database().reference().child("users")
uids.observeSingleEvent(of:.value, with:{
(snapshot) in
let users = snapshot.value as! [String : NSDictionary]
//self.user.removeAll()
for (_, value) in users {
if let uid = value["uid"] as? String {
if uid != Auth.auth().currentUser!.uid {
let userToShow = User()
if let username = value["username"] as? String, let imagePath = value["urlToImage"] as? String{
userToShow.username = username
userToShow.imagePath = imagePath
userToShow.userID = uid
self.user.append(userToShow)
print(userToShow)
}
}
}
}
self.collectionview.reloadData()
})
//ref.removeAllObservers()
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return user.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionview.dequeueReusableCell(withReuseIdentifier: "userCell", for: indexPath) as! UserCell
cell.userImage.sd_setImage(with: URL(string: self.user[indexPath.row].imagePath))
cell.nameLabel.text = self.user[indexPath.row].username
cell.userID = self.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
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print("hello world")
// let VC1 = self.storyboard!.instantiateViewController(withIdentifier: "ProfileViewController") as! ProfileViewController
// VC1.sentUserID = user[indexPath.row].userID
// self.navigationController?.pushViewController(VC1, animated: true)
}
func checkFollowing(indexPath: IndexPath) {
let uid = Auth.auth().currentUser!.uid
let ref = Database.database().reference()
ref.child("users").child(uid).child("following").queryOrderedByKey().observeSingleEvent(of: .value, with: { snapshot in
if let following = snapshot.value as? [String : AnyObject] {
for (_, value) in following {
if value as! String == self.user[indexPath.row].userID {
// self.tableview.cellForRow(at: indexPath)?.accessoryType = .checkmark
}
}
}
})
ref.removeAllObservers()
}
@IBAction func logOutPressed(_ sender: Any) {
KeychainWrapper.standard.removeObject(forKey:"uid")
do{
try Auth.auth().signOut()
} catch let signOutError as NSError{
print("Error signing out: %@", signOutError)
}
dismiss(animated: true, completion: nil)
}
}
extension UIImageView {
func downloadImage(from imgURL: String!) {
let url = URLRequest(url: URL(string: imgURL)!)
let task = URLSession.shared.dataTask(with: url) {
(data, response, error) in
if error != nil {
print(error!)
return
}
DispatchQueue.main.async {
self.image = UIImage(data: data!)
}
}
task.resume()
}
}