ios - 我的程序没有错误，但没有显示所需的用户名和与司机的距离，因为它应该

Question

这是要调用的类:

import Foundation
import MapKit

class Requests {
    private var _username:String!
    private var _key:String!
    var distanceFromDriver:Double! = 0.0
    private var _latitude:CLLocationDegrees!
    private var _longitude:CLLocationDegrees!
    private var _location:CLLocation!
    private var _driverLocation:CLLocation!

    var username:String {
        return _username
    }

    var key:String {
        return _key
    }

    var latitude:CLLocationDegrees {
        return _latitude
    }

    var longitude:CLLocationDegrees {
        return _longitude
    }

    var location: CLLocation {
        return self._location
    }

    init(uid:String, dictionary: Dictionary<String, AnyObject>, driverLocation:CLLocation, tView: UITableView) {

        self._key = uid
        self._driverLocation = driverLocation

        if let lat = dictionary["Latitude"] as? Double {

            self._latitude = lat

        }

        if let long = dictionary["Longitude"] as? Double {

            self._longitude = long

        }

        if let email = dictionary["Email"] as? String {

            self._username = email

        }
        let riderLocation = CLLocation(latitude: self._latitude, longitude: self._longitude)
        self._location = riderLocation


        let distanceInKM = _driverLocation.distanceFromLocation(riderLocation)
        let miles = (distanceInKM / 1000) * 0.62137
        self.distanceFromDriver = miles
        tView.reloadData()
    }

}

这是需要检索上面的类:

import UIKit
import Firebase
import MapKit
import CoreLocation
import FirebaseAuth


class DriverVC: UITableViewController, MKMapViewDelegate, CLLocationManagerDelegate {



    var requests = [Requests]()
    var locationManager:CLLocationManager!

    @IBOutlet var tableview: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()

        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()
        locationManager.allowsBackgroundLocationUpdates = true
        locationManager.startUpdatingLocation()

        self.tableView.registerNib(UINib(nibName: "cell", bundle: nil),
                                   forCellReuseIdentifier: "reuseIdentifier")
    }


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.requests.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)

        if self.requests.count >= 1 {
            self.requests.sortInPlace({$0.distanceFromDriver < $1.distanceFromDriver})

            cell.textLabel!.text = String(format: "%.01f \(self.requests[indexPath.row].username)", self.requests[indexPath.row].distanceFromDriver)

        } else {
            self.requests = []
            self.tableView.reloadData()
        }

        return cell
    }
}

Answer 1

我没有足够的点来评论，购买我的后续是:是否显示任何内容(即用户名/距离不显示，是否显示其他内容？如果插入 print() cellForRowAtIndexPath 中的语句您注意到被调用了吗？