列出firebase用户列表

时间:2016-04-21 13:23:57

标签: swift firebase firebase-realtime-database

我正在尝试使用用户名列出Firebase中的所有用户。

This is how my users is saved.

我的问题是我正在尝试制作一个包含所有用户的数组。

import UIKit
import Firebase

var memberRef = Firebase(url: "\(BASE_URL)/users")
//var currentUser = DataService.dataService.USER_REF.authData.uid



var currentUsers: [String] = [String]()

class dataTableView: UITableViewController
{

    override func viewDidLoad()
    {
        loadUsers()
    }

    func loadUsers()
    {
        // Create a listener for the delta additions to animate new items as they're added
        memberRef.observeEventType(.ChildAdded, withBlock: { (snap: FDataSnapshot!) in

            print(currentUsers)

            // Add the new user to the local array
            currentUsers.append(snap.value as! String)

            // Get the index of the current row
            let row = currentUsers.count - 1

            // Create an NSIndexPath for the row
            let indexPath = NSIndexPath(forRow: row, inSection: 0)

            // Insert the row for the table with an animation
            self.tableView.insertRowsAtIndexPaths([indexPath], withRowAnimation: .Top)

        })
    }

但是我得到NSDictionary类型的错误cant cast值到NSString。

1 个答案:

答案 0 :(得分:1)

Firebase快照是字典,而不是字符串,这就是您收到该错误的原因。

要访问快照的元素:

if let name = snapshot.value["name"] as? String {
   print(name)
}

您也可以使用

if let name = snapshot.value.objectForKey("name") as? String {