表格单元格中的按钮无法点击
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【中文标题】表格单元格中的按钮无法点击【英文标题】：Button in the table cell not working upon tapping 【发布时间】：2019-11-29 14:40:37 【问题描述】：我正在为 UITableView 使用下面的代码，在每个单元格中都有两个按钮配置为执行某些操作，如代码所示。早些时候它工作正常，但现在当我将此代码更新到新版本的 Xcode 时它不起作用，每当我点击单元格或单元格中的按钮时，它都不会执行任何操作，也不会显示任何错误，但是它只是用灰色使单元格的一半变暗？
Xcode 之前是 10，现在是 11，两种情况下 swift 5 版本相同
顶部有一个固定单元格，然后根据数据库中的文档数量列出单元格
可能是什么问题？
关于我正在使用 Swift ios 和 cloud firestore 数据库的信息
class HomeViewController: UITableViewController
var posts = [Post]()
var db: Firestore!
var scores1 = [Scores]()
var postAuthorId:String = ""
var postAuthorname:String = ""
var CommentAuthorName:String = ""
var PostTitle:String = ""
var postAuthorGender:String = ""
var postAuthorEmail:String = ""
var postAuthorfullname:String = ""
var postAuthorSpinnerC:String = ""
var postContent:String = ""
var postCategory:String = ""
var postAuthorPicUrl:String = ""
var postTimeStamp:String = ""
var l11:Int = 0
var postKey:String = ""
private var documents: [DocumentSnapshot] = []
override func viewDidLoad()
super.viewDidLoad()
db = Firestore.firestore()
tableView.dataSource = self
tableView.delegate = self
retrieveAllPosts()
getuserscores()
var AViewController: UIViewController = UIViewController()
var MyTabBarItem: UITabBarItem = UITabBarItem(title: nil, image: UIImage(named: "pencil")?.withRenderingMode(UIImage.RenderingMode.alwaysOriginal), selectedImage: UIImage(named: "pencil"))
AViewController.tabBarItem = MyTabBarItem
// Do any additional setup after loading the view.
// navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Sign Out", style: .plain, target: self, action: #selector(handleLogout))
func getuserscores()
let userRef = Firestore.firestore().collection("users").document(Auth.auth().currentUser!.uid)
userRef.getDocument(document, error) in
if let document = document, document.exists
let dataDescription = document.data().map(String.init(describing:)) ?? "nil"
let l1 = document.get("l1") as! Int
let l2 = document.get("l2") as! Int
let l3 = document.get("l3") as! Int
let l4 = document.get("l4") as! Int
let newScores = Scores(_l1: l1, _l2: l2, _l3: l3, _l4: l4)
self.scores1.append(newScores)
self.tableView.reloadData()
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
func retrieveAllPosts()
let postsRef = Firestore.firestore().collection("posts").order(by: "timestamp", descending: true).limit(to: 50)
postsRef.getDocuments (snapshot, error) in
if let error = error
print(error.localizedDescription)
else
if let snapshot = snapshot
for document in snapshot.documents
let data = document.data()
let username = data["post_author_username"] as? String ?? ""
let postTitle = data["postTitle"] as? String ?? ""
let postcategory = data["postcategory"] as? String ?? ""
let postContent = data["postContent"] as? String ?? ""
let postAuthorProfilePicUrl = data["post_user_profile_pic_url"] as? String ?? ""
let postAuthorSpinnerC = data["post_author_spinnerC"] as? String
let newSourse = Post(_documentId: document.documentID, _username: username, _postTitle: postTitle, _postcategory: postcategory, _postContent: postContent, _postuserprofileImagUrl: postAuthorProfilePicUrl, _postAuthorSpinncerC: postAuthorSpinnerC)
self.posts.append(newSourse)
self.tableView.reloadData()
override func viewWillAppear(_ animated: Bool)
super.viewWillAppear(animated)
tableView.estimatedRowHeight = 200
tableView.rowHeight = UITableView.automaticDimension
override func numberOfSections(in tableView: UITableView) -> Int
return 1
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
return scores1.count + posts.count
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
if indexPath.row == 0 && scores1.count == 1
let cell = tableView.dequeueReusableCell(withIdentifier: "SmileMiles") as! ScoresCellInHomeScreen
cell.set(scores: scores1[indexPath.row])
return cell
else if posts.count > (indexPath.row - 1 )
let cell = tableView.dequeueReusableCell(withIdentifier: "postCell", for: indexPath) as! PostTableViewCell
cell.btnComment.tag = indexPath.row - 1
cell.btnComment.addTarget(self, action: #selector(toComments(_:)), for: .touchUpInside)
cell.favoritebutton.tag = indexPath.row - 1
cell.favoritebutton.addTarget(self, action: #selector(favupdate(_:)), for: .touchUpInside)
cell.set(post: posts[indexPath.row - 1 ])
return cell
else
return UITableViewCell()
@objc func favupdate(_ sender: AnyObject)
let commentbutton = sender as! UIButton
let post = posts[commentbutton.tag]
postKey = post._documentId // or what key value it is
let userMarkRef = Firestore.firestore().collection("users").document(Auth.auth().currentUser!.uid).collection("marked_posts").document(postKey)
let postRef = Firestore.firestore().collection("posts").document(postKey)
postRef.getDocument(document, error) in
if let document = document, document.exists
let dataDescription = document.data().map(String.init(describing:)) ?? "nil"
self.postAuthorId = document.get("post_author_id") as! String
self.postAuthorname = document.get("post_author_username") as! String
self.PostTitle = document.get("postTitle") as! String
self.postContent = document.get("postContent") as! String
self.postAuthorEmail = document.get("post_author_email") as! String
self.postCategory = document.get("postcategory") as! String
self.postAuthorfullname = document.get("post_author_fullname") as! String
self.postAuthorGender = document.get("post_author_gender") as! String
self.postAuthorPicUrl = document.get("post_user_profile_pic_url") as! String
// let l11:Bool = document.get("l1") as! Bool
// self.postTimeStamp = document.get("post_timeStamp") as! String
self.postAuthorSpinnerC = document.get("post_author_spinnerC") as! String
let postObject = [
"post_author_gender": self.postAuthorGender,
// "post_author_dateOfBirth": self.dateOfBirth,
"post_author_spinnerC": self.postAuthorSpinnerC,
"post_author_fullname": self.postAuthorfullname,
"post_author_id": self.postAuthorId,
"post_author_username": self.postAuthorname,
"post_author_email": self.postAuthorEmail,
"postTitle": self.PostTitle,
"postcategory": self.postCategory,
"postContent": self.postContent,
// "post_timestamp": FieldValue.serverTimestamp(),
"post_user_profile_pic_url":self.postAuthorPicUrl,
"post_id": self.postKey
] as [String : Any]
userMarkRef.setData(postObject, merge: true) (err) in
if let err = err
print(err.localizedDescription)
print("Successfully set new user data")
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
if indexPath.row == 0
return 150
else
return UITableView.automaticDimension
@objc func toComments(_ sender: AnyObject)
let commentbutton = sender as! UIButton
let post = posts[commentbutton.tag]
postKey = post._documentId // or what key value it is
print(postKey + "hello")
performSegue(withIdentifier: "toCommentsList", sender: self)
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
if(segue.identifier == "toCommentsList")
var vc = segue.destination as! CommentListViewController
vc.postId = postKey
【问题讨论】：
尝试单步调试您的代码，看看会发生什么。此外，这可能是相关的，您正在对选项进行大量强制解包。最好使用if button = sender as? UIButton ... 之类的东西。所有字符串都类似。
但早些时候它可以工作，我试过但无法弄清楚
那么唯一改变的是Xcode和Swift版本？尝试将项目中的 Swift 版本设置回之前的版本。错误可能一直存在，但现在在升级后暴露。
另外，请包括之前和之后的 Xcode 和 Swift 版本（在您的问题中，而不是在 cmets 中）。谢谢。
没用，但删除情节提要中的按钮并重新配置它们成功了
【参考方案1】：
在返回单元格之前在 tableview cellForRowAt 函数中执行此操作：
cell.selectionStyle = .none
return cell
这将解决问题
【讨论】：
然后增加你的按钮尺寸可能是它的尺寸太小，用户无法点击。 我删除了按钮，然后重新配置它们现在可以正常工作了，感谢您的建议以上是关于表格单元格中的按钮无法点击的主要内容，如果未能解决你的问题，请参考以下文章
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