Firebase realtime database 在Xcode 10中使用GeoFire设置用户位置

我的编码（如您将看到的）以及对Xcode和Swift的熟悉是基本的，但我正在学习。。。我意识到我的代码嵌套不是最好的，如果有的话。我正在尝试将GeoFire集成到我的Xcode 10应用程序中。我已经寻找了一个明确的解释，但我仍然没有找到答案。我有一个注册表格来注册用户。最初的Firebase设置非常简单，我有一个功能齐全的表单，可以在Firebase中注册用户。现在我尝试添加GeoFire以跟踪用户的位置

我从YouTube视频和网站上尝试了很多方法，但都不管用

import UIKit
import Foundation
import CoreLocation
import Firebase
import GeoFire

class SecondViewController: UIViewController {

    //Firebase DB ref
    var refDriver: DatabaseReference!




    @IBOutlet weak var name: UITextField!

    @IBOutlet weak var employeenumber: UITextField!    

    @IBOutlet weak var label: UILabel!


    @IBAction func submit(_ sender: UIButton) {
        addDriver()
    }


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        //configuring firebase and ensures no error is returned
        if(FirebaseApp.app() == nil){
            FirebaseApp.configure()

        }


        //getting a reference to the node driver
        refDriver = Database.database().reference().child("driver");

    }

    func addDriver(){
        //generating a new key inside driver node
        //and also getting the generated key
        let key = refDriver.childByAutoId().key

        //creating driver with the given values
        let driver = ["id":key,
                      "name": name.text! as String,
                        "employeenumber": employeenumber.text! as String
                            ]

        //adding the driver to Firebase
        refDriver.child(key!).setValue(driver)



        //displaying submit message
        label.text = "You are registered."
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

---

嘿，在安装pod后尝试导入模块

import GeoFire

在

viewdidLoad（）

函数中调用

setupGeofire（）

在setupGeoFire中，我创建了一个var geoFireRef，这正是您要保存用户位置信息的节点

let geoFireRef = Database.database().reference().child("user_locations")

然后我们通过传入该节点位置，即我们的geofiref变量，来创建geoFire对象

然后使用 ```self.geoFire=geoFire```

如果您想在特定半径（km）内获得用户，也可以检查下面的func

func loadUsersWithin(radius: Double){

        guard let uid = Auth.auth().currentUser?.uid else{return}
        geoFire?.getLocationForKey(uid, withCallback: { (userLocation, err) in

            guard let userLocation = userLocation else{return}
            self.myQuery = self.geoFire?.query(at: userLocation, withRadius: radius)

            self.myQuery?.observe(.keyEntered, with: { (key, location) in

                if key == uid{
                    return
                }
                Database.database().reference().child("users").child(key).observeSingleEvent(of: .value, with: { (snapshot) in

                    guard let userDictionary = snapshot.value as? [String:Any] else{return}
                    let user = User(uid: key, dictionary: userDictionary)
                    self.user = user
                    self.usersArray.append(user)
                    self.nearbyCV.reloadData()
                }, withCancel: { (err) in
                    print(err)
                })
            })
        })

    }
}

这是我的User.swift数据模型

import UIKit

class User{

    var name: String
    var userImgUrlString: String
    var age: String
    var uid: String
    var aboutMeText:String

    init(uid: String,dictionary: [String: Any]) {

        self.name = dictionary["username"] as? String ?? ""
        self.userImgUrlString = dictionary["profileImageUrlString"] as? String ?? ""
        self.aboutMeText = dictionary["aboutMe"] as? String ?? ""
        self.uid = uid
        self.age = dictionary["age"] as? String ?? ""
    }
}```
hope this helps yo it was hard to find info for me too when i just started but it gets better

---

是的，它确实有帮助，而且比我能找到的要好得多。但是，我现在有两个错误：let user=user（uid:key，（传递给不带参数的调用的参数）和self.nearbyCV.reloadData（）（类型为'SecondViewController'的值没有成员'nearbyCV'）@Peter User是我用来保存数据的数据模型或结构，因此如果您没有User.swift文件，它将不知道它是什么。我正在使用的UiCollectionView的neabyCV出口。“.reloadData（）”调用numberOfRows函数和其他委托方法，以用新数据重新填充collectionView

func loadUsersWithin(radius: Double){

        guard let uid = Auth.auth().currentUser?.uid else{return}
        geoFire?.getLocationForKey(uid, withCallback: { (userLocation, err) in

            guard let userLocation = userLocation else{return}
            self.myQuery = self.geoFire?.query(at: userLocation, withRadius: radius)

            self.myQuery?.observe(.keyEntered, with: { (key, location) in

                if key == uid{
                    return
                }
                Database.database().reference().child("users").child(key).observeSingleEvent(of: .value, with: { (snapshot) in

                    guard let userDictionary = snapshot.value as? [String:Any] else{return}
                    let user = User(uid: key, dictionary: userDictionary)
                    self.user = user
                    self.usersArray.append(user)
                    self.nearbyCV.reloadData()
                }, withCancel: { (err) in
                    print(err)
                })
            })
        })

    }
}

import UIKit

class User{

    var name: String
    var userImgUrlString: String
    var age: String
    var uid: String
    var aboutMeText:String

    init(uid: String,dictionary: [String: Any]) {

        self.name = dictionary["username"] as? String ?? ""
        self.userImgUrlString = dictionary["profileImageUrlString"] as? String ?? ""
        self.aboutMeText = dictionary["aboutMe"] as? String ?? ""
        self.uid = uid
        self.age = dictionary["age"] as? String ?? ""
    }
}```
hope this helps yo it was hard to find info for me too when i just started but it gets better