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我的VC中有一個代碼（作爲我的大型項目的一部分）中有以下代碼。我的一個Firebase數據庫引用被稱爲Sell_Request。它有三個孩子（name,latitude和longitude），但我現在只關注name。在TableView Cell中顯示來自Firebase的數據
我想將它添加到一個字符串數組，並將其打印到控制檯。我看到正在打印到控制檯的名稱，但我沒有得到單個單元格中打印的名稱。
感謝您的期待。
import UIKit
import Firebase
import FirebaseDatabase
import MapKit
import CoreLocation
class RequestVC: UITableViewController, CLLocationManagerDelegate {
var locationManager = CLLocationManager()
var sellerUserNames = [String]()
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "backToMain" {
self.navigationController?.navigationBar.isHidden = true
}
}
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = manager.location?.coordinate {
let databaseRef = FIRDatabase.database().reference()
databaseRef.child("Sell_Request").queryOrderedByKey().observe(.childAdded, with: { (FIRDataSnapshot) in
if let data = FIRDataSnapshot.value as? NSDictionary {
if let name = data[Constants.NAME] as? String {
self.sellerUserNames.append(name)
print(name)
}
}
})
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return sellerUserNames.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = sellerUserNames[indexPath.row]
return cell
}
/*
// Override to support conditional editing of the table view.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
*/
/*
// Override to support editing the table view.
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
// Delete the row from the data source
tableView.deleteRows(at: [indexPath], with: .fade)
} else if editingStyle == .insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return true
}
*/
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
你可以檢查你的計數是不是0.A在你的打印行重新加載主線程表。 –
嗨，你需要重新加載你的tableview。添加你的tableview名稱的引用它的tableView，然後在你的if let數據語句的末尾添加self.tableView.reloadData（） – webjunkie
感謝您的回覆......我對這個還是有點新的。你的意思是創建一個變量（var tableView：UITableView！）或創建一個IBOutlet（@IBOutlet var tableView：UITableView！）或其他？ – user2411290