インターネット接続を確認する（iOS 10）

Question

IOS 9では、Reachabilityパブリッククラスを使用して、デバイスがインターネットに接続されているかどうかを確認していました。 Swift 2コードをSwift 3に変換しましたが、到達可能性が機能しなくなりました。 iOS 10でインターネット接続を確認する方法を教えてもらえますか？ありがとう！コードスニペットは次のとおりです。

open class Reachability {
    class func isConnectedToNetwork() -> Bool {
        var zeroAddress = sockaddr_in()
        zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)
        let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
            SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
        }
        var flags = SCNetworkReachabilityFlags()
        if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
            return false
        }
        let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
        let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
        return (isReachable && !needsConnection)
    }
}

Answer 1

import Foundation
import SystemConfiguration

func isInternetAvailable() -> Bool
    {
        var zeroAddress = sockaddr_in()
        zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)

        let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
                SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
            }
        }

        var flags = SCNetworkReachabilityFlags()
        if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
            return false
        }
        let isReachable = flags.contains(.reachable)
        let needsConnection = flags.contains(.connectionRequired)
        return (isReachable && !needsConnection)
    }

これはiOS 10で動作します

Answer 2

Swift 3.：とても簡単な方法です：

import SystemConfiguration


protocol Utilities {
}

extension NSObject:Utilities{


    enum ReachabilityStatus {
        case notReachable
        case reachableViaWWAN
        case reachableViaWiFi
    }

    var currentReachabilityStatus: ReachabilityStatus {

        var zeroAddress = sockaddr_in()
        zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
        zeroAddress.sin_family = sa_family_t(AF_INET)

        guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
                SCNetworkReachabilityCreateWithAddress(nil, $0)
            }
        }) else {
            return .notReachable
        }

        var flags: SCNetworkReachabilityFlags = []
        if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
            return .notReachable
        }

        if flags.contains(.reachable) == false {
            // The target Host is not reachable.
            return .notReachable
        }
        else if flags.contains(.isWWAN) == true {
            // WWAN connections are OK if the calling application is using the CFNetwork APIs.
            return .reachableViaWWAN
        }
        else if flags.contains(.connectionRequired) == false {
            // If the target Host is reachable and no connection is required then we'll assume that you're on Wi-Fi...
            return .reachableViaWiFi
        }
        else if (flags.contains(.connectionOnDemand) == true || flags.contains(.connectionOnTraffic) == true) && flags.contains(.interventionRequired) == false {
            // The connection is on-demand (or on-traffic) if the calling application is using the CFSocketStream or higher APIs and no [user] intervention is needed
            return .reachableViaWiFi
        } 
        else {
            return .notReachable
        }
    }

}

そして、たとえば、プロジェクトのどこでも使用できます：

  func viewDidLoad(){
      print(currentReachabilityStatus != .notReachable) //true connected
    }

Answer 3

これを試してください、それは私のために最初に動作しますimport the SystemConfigurationあなたのクラスに。

import SystemConfiguration

そして、以下の機能を実装します。

func isConnectedToNetwork() -> Bool {

    var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
    zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
    zeroAddress.sin_family = sa_family_t(AF_INET)
    let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
        $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
            SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
        }
    }

    var flags = SCNetworkReachabilityFlags()
    if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
        return false
    }
    let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
    let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0

    return (isReachable && !needsConnection)

}

Answer 4

ステップ1：プロジェクトにSwiftファイルを作成します。 「ConnectionCheck.Swift」を作成しました

ステップ2：このコードを「ConnectionCheck.Swift」ファイルに追加し、「Import SystemConfiguration」ファイルを「ConnectionCheck.Swift」および「ViewController.Swift」に追加します

import Foundation
import SystemConfiguration
public class ConnectionCheck {

class func isConnectedToNetwork() -> Bool {

    var zeroAddress = sockaddr_in()
    zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
    zeroAddress.sin_family = sa_family_t(AF_INET)

    guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
        $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
            SCNetworkReachabilityCreateWithAddress(nil, $0)
        }
    }) else {
        return false
    }

    var flags: SCNetworkReachabilityFlags = []
    if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
        return false
    }

    let isReachable = flags.contains(.reachable)
    let needsConnection = flags.contains(.connectionRequired)

    return (isReachable && !needsConnection)
}

}

ステップ3：「ViewController.Swift」でこのコードを使用してネットワーク到達可能性を確認します

if ConnectionCheck.isConnectedToNetwork() {
        print("Connected")
    }
    else{
        print("disConnected")
    }

Answer 5

これは、コールバック関数を介したSwift 3ソリューションです。isConnectedToNetwork()は、上記のYasin Ugurluによるソリューションから取得されます。

class func isInternetAvailable(webSiteToPing: String?, completionHandler: @escaping (Bool) -> Void) {

    // 1. Check the WiFi Connection
    guard isConnectedToNetwork() else {
      completionHandler(false)
      return
    }

    // 2. Check the Internet Connection
    var webAddress = "https://www.google.com" // Default Web Site
    if let _ = webSiteToPing {
      webAddress = webSiteToPing!
    }

    guard let url = URL(string: webAddress) else {
      completionHandler(false)
      print("could not create url from: \(webAddress)")
      return
    }

    let urlRequest = URLRequest(url: url)
    let session = URLSession.shared
    let task = session.dataTask(with: urlRequest, completionHandler: { (data, response, error) in
      if error != nil || response == nil {
        completionHandler(false)
      } else {
        completionHandler(true)
      }
    })

    task.resume()
  }

Answer 6

このコードは役に立ちます。 Swift 4およびXcode 9で機能しました

https://github.com/ashleymills/Reachability.Swift/tree/master/Reachability に移動し、Reachability.Swiftファイルをプロジェクトにコピーします

Vasil Nunevはこの到達可能性を明確に説明しています https://www.youtube.com/watch?v=wDZmz9IsB-8

class ViewController: UIViewController {

   let reachability = Reachability();
    override func viewDidLoad() {
        super.viewDidLoad()

        reachability?.whenReachable = { _ in

            DispatchQueue.main.async {
                self.view.backgroundColor = UIColor.green
            }
        }

        reachability?.whenUnreachable = { _ in
            DispatchQueue.main.async {
                self.view.backgroundColor = UIColor.red
            }
        }
        NotificationCenter.default.addObserver(self, selector: #selector(internetChanged), name: Notification.Name.reachabilityChanged , object: reachability)
        do{

            try reachability?.startNotifier()
        }catch{
            print("Could not start notifier:\(error)")
        }

    }

    @objc func internetChanged(note:Notification)  {
        let reachability  = note.object as! Reachability

        if reachability.connection != .none {

            if reachability.connection == .wifi{
                DispatchQueue.main.async {
                    self.view.backgroundColor = #colorLiteral(red: 0.3411764801, green: 0.6235294342, blue: 0.1686274558, alpha: 1)
                }
            }else if reachability.connection == .cellular{
                DispatchQueue.main.async {
                    self.view.backgroundColor = #colorLiteral(red: 0.3647058904, green: 0.06666667014, blue: 0.9686274529, alpha: 1)
                }
            }
        }else{
            DispatchQueue.main.async {
                self.view.backgroundColor = #colorLiteral(red: 0.7450980544, green: 0.1568627506, blue: 0.07450980693, alpha: 1)
            }
        }
    }
}

Answer 7

Swift 4/Xcode 10：

@Lance Samariaの質問に答えるために、@ Pavle Mijatovicと@Krutagn Patel（感謝の意）のソリューションから2つの機能を（少し変更して）組み合わせます。 :)

私はほとんどすべての可能性をチェックしました。 （コードは強化できますが、正常に動作します）

次のようなクラスがあります：

import Foundation
import SystemConfiguration

public class ConnectionCheck {

    class func isConnectedToNetwork() -> Bool {

        var zeroAddress = sockaddr_in()
        zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
        zeroAddress.sin_family = sa_family_t(AF_INET)

        guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
                SCNetworkReachabilityCreateWithAddress(nil, $0)
            }
        }) else {
            return false
        }

        var flags: SCNetworkReachabilityFlags = []
        if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
            return false
        }

        let isReachable = flags.contains(.reachable)
        let needsConnection = flags.contains(.connectionRequired)

        return (isReachable && !needsConnection)
    }


    class func isInternetAvailable(webSiteToPing: String?, completionHandler: @escaping (_ b: Bool) -> Void) {

        // 1. Check the WiFi Connection
        guard isConnectedToNetwork() else {
            completionHandler(false)
            return
        }

        // 2. Check the Internet Connection
        var webAddress = "https://www.google.com" // Default Web Site
        if let _ = webSiteToPing {
            webAddress = webSiteToPing!
        }

        guard let url = URL(string: webAddress) else {
            completionHandler(false)
            print("could not create url from: \(webAddress)")
            return
        }

        let urlRequest = URLRequest(url: url)
        let session = URLSession.shared
        let task = session.dataTask(with: urlRequest, completionHandler: { (data, response, error) in
            if error != nil || response == nil {
                completionHandler(false)
            } else {
                completionHandler(true)
            }
        })

        task.resume()
    }
}

インターネット接続を確認する必要がある場合は、次のコードを使用します。たとえば、inappDelegate-> applicationDidBecomeActive関数。

説明：completionHandler関数（上記）が呼び出されるたびに、結果（trueまたはfalse）がbとして以下のコードに渡されます。したがって、bがtrueの場合、インターネットに接続されています。

let web : String? = "https://www.google.com"
ConnectionCheck.isInternetAvailable(webSiteToPing: web) { (b)  in
 print(b)
if b {
print("connected") // or do something here
    } else {
print("disconnected") // or do something here
}
}

Answer 8

Swift 3で使用できます

import SystemConfiguration

class Connection {

    class func isConnectedToNetwork() -> Bool {

        var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
        zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)

        let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
            SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, UnsafePointer($0))
        }

        var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
        if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
            return false
        }

        let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
        let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0

        return isReachable && !needsConnection

    }
}

Answer 9

Swift 4.0の別のソリューション。 IUOの大ファンではなく、ガードを使う

 func isConnectedToNetwork() -> Bool {
    var zeroAddress = sockaddr_in()
    zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
    zeroAddress.sin_family = sa_family_t(AF_INET)

    guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
        $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
            SCNetworkReachabilityCreateWithAddress(nil, $0)
        }
    }) else {
        return false
    }

    var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
    if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == false {
        return false
    }

    let isReachable = flags == .reachable
    let needsConnection = flags == .connectionRequired
    return isReachable && !needsConnection
}

Answer 10

1）プロジェクト内に新しいSwiftファイルを作成し、「Reachability.Swift」という名前を付けます。

2）次のコードをカットアンドペーストして、クラスを作成します。

import Foundation
import SystemConfiguration

public class Reachability {

class func isConnectedToNetwork() -> Bool {

    var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
    zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
    zeroAddress.sin_family = sa_family_t(AF_INET)

    let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
        SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, UnsafePointer($0))
    }

    var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
    if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
        return false
    }

    let isReachable = flags == .Reachable
    let needsConnection = flags == .ConnectionRequired

    return isReachable && !needsConnection

     }
}

3）次のコードを使用して、プロジェクト内のどこでもインターネット接続を確認できます。

 if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
}

4）ユーザーがインターネットに接続していない場合、アラートダイアログを表示して通知することができます。

if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
var alert = UIAlertView(title: "No Internet Connection", message: "Make sure your 
 device is connected to the internet.", delegate: nil, cancelButtonTitle: "OK")
alert.show()
}

Answer 11

1. プロジェクト内にSwiftファイルを作成し、名前を「Reachability.Swift」とします。次に、このReachability.Swiftファイルに以下のコードを貼り付けます。

   import Foundation
   
   import SystemConfiguration
   
   public class Reachability {
   
       class func isConnectedToNetwork() -> Bool {
   
           var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
           zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
           zeroAddress.sin_family = sa_family_t(AF_INET)
   
           let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
               SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, UnsafePointer($0))
           }
   
           var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
           if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
               return false
           }
   
           let isReachable = flags == .Reachable
           let needsConnection = flags == .ConnectionRequired
   
           return isReachable && !needsConnection
   
       }
   }
   

次に、以下のコードを使用してプロジェクト内のどこでもインターネットをチェックできます

  if Reachability.isConnectedToNetwork() == true {
        println("Internet connection OK")
    } else {
        println("Internet connection FAILED")
    }

Answer 12

Swift 4/Xcode 9+（Reachability.Swiftファイルを作成）：

public class Reachability {

    class func isConnectedToNetwork() -> Bool {

        var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
        zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)

        let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
                SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
            }
        }

        var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
        if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
            return false
        }

        // Working for Cellular and WIFI
        let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
        let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
        let ret = (isReachable && !needsConnection)

        return ret

    }
}

使用法：

if Reachability.isConnectedToNetwork() {
// connected, do something
}