如何在 Alamofire 中使用 NetworkReachabilityManager

Question

我想要在 Objective-C 中使用类似于 AFNetworking 的功能，在 Swift 中使用 Alamofire NetworkReachabilityManager：

//Reachability detection
[[AFNetworkReachabilityManager sharedManager] startMonitoring];
[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
    switch (status) {
        case AFNetworkReachabilityStatusReachableViaWWAN: {
            [self LoadNoInternetView:NO];
            break;
        }
        case AFNetworkReachabilityStatusReachableViaWiFi: {
            [self LoadNoInternetView:NO];
            break;
        }
        case AFNetworkReachabilityStatusNotReachable: {
            break;
        }
        default: {
            break;
        }
    }
}];

我目前正在使用监听器来了解状态随网络的变化

let net = NetworkReachabilityManager()
net?.startListening()

有人可以描述如何支持这些用例吗？

Answer 1

我自己找到了答案，即只需编写一个带有闭包的监听器，如下所述：

let net = NetworkReachabilityManager()

net?.listener = { status in
    if net?.isReachable ?? false {

    switch status {

    case .reachable(.ethernetOrWiFi):
        print("The network is reachable over the WiFi connection")

    case .reachable(.wwan):
        print("The network is reachable over the WWAN connection")

    case .notReachable:
        print("The network is not reachable")

    case .unknown :
        print("It is unknown whether the network is reachable")

    }
}

net?.startListening()

Answer 2

这是我的实现。我在单身人士中使用它。请记住坚持使用可达性管理器参考。

let reachabilityManager = Alamofire.NetworkReachabilityManager(host: "www.apple.com")

func listenForReachability() {
    self.reachabilityManager?.listener = { status in
        print("Network Status Changed: \(status)")
        switch status {
        case .NotReachable:
            //Show error state
        case .Reachable(_), .Unknown:
            //Hide error state
        }
    }

    self.reachabilityManager?.startListening()
}

Answer 3

网络管理器Class

class NetworkManager {

//shared instance
static let shared = NetworkManager()

let reachabilityManager = Alamofire.NetworkReachabilityManager(host: "www.google.com")

func startNetworkReachabilityObserver() {

    reachabilityManager?.listener = { status in
        switch status {

            case .notReachable:
                print("The network is not reachable")

            case .unknown :
                print("It is unknown whether the network is reachable")

            case .reachable(.ethernetOrWiFi):
                print("The network is reachable over the WiFi connection")

            case .reachable(.wwan):
                print("The network is reachable over the WWAN connection")

            }
        }

        // start listening
        reachabilityManager?.startListening()
   }
}

启动网络可达性观察器

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        // add network reachability observer on app start
        NetworkManager.shared.startNetworkReachabilityObserver()

        return true
    }
}

Answer 4

只要您保留对 reachabilityManager 的引用，我就可以使用单例

class NetworkStatus {
static let sharedInstance = NetworkStatus()

private init() {}

let reachabilityManager = Alamofire.NetworkReachabilityManager(host: "www.apple.com")

func startNetworkReachabilityObserver() {
    reachabilityManager?.listener = { status in

        switch status {

        case .notReachable:
            print("The network is not reachable")

        case .unknown :
            print("It is unknown whether the network is reachable")

        case .reachable(.ethernetOrWiFi):
            print("The network is reachable over the WiFi connection")

        case .reachable(.wwan):
            print("The network is reachable over the WWAN connection")

        }
    }
    reachabilityManager?.startListening()
}

因此您可以在您的应用中的任何位置像这样使用它：

let networkStatus = NetworkStatus.sharedInstance

override func awakeFromNib() {
    super.awakeFromNib()
    networkStatus.startNetworkReachabilityObserver()
}

如果您的网络状态发生任何变化，您将收到通知。只是为了锦上添花 this 是一个很好的动画来显示您的互联网连接丢失。

Answer 5

Apple 说尽可能使用结构而不是 class。所以这是我的@rmooney 和@Ammad 的答案版本，但使用结构而不是 class。此外，我没有使用方法或函数，而是使用了计算属性并且我从@Abhimuralidharan 的这个 Medium post 中得到了这个想法。我只是把使用结构而不是 class 的想法（所以你不必有一个单例）和使用计算的属性而不是方法调用的想法放在一个解决方案中.

这是网络状态结构：

import Foundation
import Alamofire

struct NetworkState {

    var isConnected: Bool {
        // isReachable checks for wwan, ethernet, and wifi, if
        // you only want 1 or 2 of these, the change the .isReachable
        // at the end to one of the other options.
        return NetworkReachabilityManager(host: www.apple.com)!.isReachable
    }
}

以下是您如何在任何代码中使用它：

if NetworkState().isConnected {
    // do your is Connected stuff here
}

Answer 6

SWIFT 5

网络状态结构

import Foundation
import Alamofire

struct NetworkState {

    var isInternetAvailable:Bool
    {
        return NetworkReachabilityManager()!.isReachable
    }
}

使用：-

  if (NetworkState().isInternetAvailable) {
        // Your code here
   }

Answer 7

Swift 5: 不需要侦听器对象。只是我们需要调用闭包：

struct Network {

    let manager = Alamofire.NetworkReachabilityManager()

    func state() {
        manager?.startListening { status in
            switch status {
            case .notReachable :
                print("not reachable")
            case .reachable(.cellular) :
                print("cellular")
            case .reachable(.ethernetOrWiFi) :
                print("ethernetOrWiFi")
            default :
                print("unknown")
            } 
        }
    }
}

您可以像这样开始使用此功能：

Network().state()

Answer 8

swift 4* + swift 5* 和 Alamofire 4.5+

的解决方案

CREATE a NetworkReachabilityManager class from Alamofire and configure the checkNetwork() method

import Alamofire

class Connectivity {   
    class func checkNetwork() ->Bool {
        return NetworkReachabilityManager()!.isReachable
    }
}

USAGE

switch Connectivity.checkNetwork() {
  case true:
      print("network available")
      //perform task
  case false:
      print("no network")
}

Answer 9

创建NetworkManager Class如下（为SWIFT5）

import UIKit
import Alamofire
class NetworkManager {
    static let shared = NetworkManager()
    let reachabilityManager = Alamofire.NetworkReachabilityManager(host: "www.apple.com")
    func startNetworkReachabilityObserver() {
        reachabilityManager?.startListening(onUpdatePerforming: { status in

            switch status {
                            case .notReachable:
                                print("The network is not reachable")
                            case .unknown :
                                print("It is unknown whether the network is reachable")
                            case .reachable(.ethernetOrWiFi):
                                print("The network is reachable over the WiFi connection")
                            case .reachable(.cellular):
                                print("The network is reachable over the cellular connection")
                      }
        })
    }
}

用法会像

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        // add network reachability observer on app start
        NetworkManager.shared.startNetworkReachabilityObserver()

        return true
    }
}

Answer 10

Alamofire 5 及以上

import Alamofire

// MARK: NetworkReachability

final class NetworkReachability {
    
    static let shared = NetworkReachability()

    private let reachability = NetworkReachabilityManager(host: "www.apple.com")!

    typealias NetworkReachabilityStatus = NetworkReachabilityManager.NetworkReachabilityStatus

    private init() {}
    
    /// Start observing reachability changes
    func startListening() {
        reachability.startListening { [weak self] status in
            switch status {
            case .notReachable:
                self?.updateReachabilityStatus(.notReachable)
            case .reachable(let connection):
                self?.updateReachabilityStatus(.reachable(connection))
            case .unknown:
                break
            }
        }
    }
    
    /// Stop observing reachability changes
    func stopListening() {
        reachability.stopListening()
    }
    
    
    /// Updated ReachabilityStatus status based on connectivity status
    ///
    /// - Parameter status: `NetworkReachabilityStatus` enum containing reachability status
    private func updateReachabilityStatus(_ status: NetworkReachabilityStatus) {
        switch status {
        case .notReachable:
            print("Internet not available")
        case .reachable(.ethernetOrWiFi), .reachable(.cellular):
            print("Internet available")
        case .unknown:
            break
        }
    }

    /// returns current reachability status
    var isReachable: Bool {
        return reachability.isReachable
    }

    /// returns if connected via cellular
    var isConnectedViaCellular: Bool {
        return reachability.isReachableOnCellular
    }

    /// returns if connected via cellular
    var isConnectedViaWiFi: Bool {
        return reachability.isReachableOnEthernetOrWiFi
    }

    deinit {
        stopListening()
    }
}

使用方法：

从 AppDelegate 调用 NetworkReachability.shared.startListening() 开始监听可达性变化

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
            
    var window: UIWindow?
           
            
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
             
        NetworkReachability.shared.startListening()
        
        // window and rootviewcontroller setup code
        
        return true
    }
        
}

Answer 11

Alamofire 5 略有改进

class NetworkManager {

//shared instance
static let shared = NetworkManager()

let reachabilityManager = Alamofire.NetworkReachabilityManager(host: "www.google.com")

func startNetworkReachabilityObserver() {
    
    reachabilityManager?.startListening { status in
        switch status {

        case .notReachable:
            print("The network is not reachable")

        case .unknown :
            print("It is unknown whether the network is reachable")

        case .reachable(.ethernetOrWiFi):
            print("The network is reachable over the WiFi connection")

        case .reachable(.cellular):
            print("The network is reachable over the cellular connection")

        }
     }
  }

 }

如何在 Alamofire 中使用 NetworkReachabilityManager

How to use NetworkReachabilityManager in Alamofire

reachability

ios

network-connection

swift

alamofire