Question

当用户单击表格视图中的单元格时，它会更改颜色，但是当他们刷新应用程序（例如注销并重新登录或在其iPhone上向上滑动）时，该单元格会变回原始颜色-是否可以使其在用户刷新应用程序时如此，用户单击的单元格仍保持更改后的颜色以显示它已被打开？

更新：

视图控制器中的代码

extension NotificationViewController: UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return notifications.count
}
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "NotificationTableViewCell", for: indexPath) as! NotificationTableViewCell
        let notification = notifications[indexPath.row]
        let user = users[indexPath.row]
        cell.notification = notification
        cell.user = user
        cell.delegate = self
        cell.backgroundColor = UIColor(red: 245, green: 245, blue: 245)
        return cell
     }
}

UITableViewCell中的

代码

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
    let cellBackground = UIView()
    cellBackground.backgroundColor = UIColor(red: 245, green: 245, blue: 245)
    UITableViewCell.appearance().selectedBackgroundView = cellBackground
    }
}

更新：

JSON firebase结构的片段：

 "notification" : {
    "CjeP35ceAQZJuUPhm7U1eF3Yq4F3" : {
      "-La5XJZV059J-fcbH4Px" : {
        "from" : "Gmg1ojNoBiedFPRNSL4sBZz2gSx2",
        "objectId" : "-La5XJYuWm6dLfGnte2h",
        "timestamp" : 1552740338,
      },
      "-La6KbtcG7VIIk7JsBvT" : {
        "from" : "Gmg1ojNoBiedFPRNSL4sBZz2gSx2",
        "objectId" : "-La6KbtbAAAPjeo98dGe",
        "timestamp" : 1552753786,
      },
     "FoFQDAGGX9hntBiBdXYCBHd8yas2" : {
       "-La6Kb4DyACBRihJf4c1" : {
       "from" : "Gmg1ojNoBiedFPRNSL4sBZz2gSx2",
       "objectId" : "-La6Kb42zWtwcAVlubK7",
       "timestamp" : 1552753783,
      },

用户单击后更改表视图单元格的颜色，即使刷新应用程序也是如此

0 个答案: