检测 Internet 连接 xcode swift 任何更改的最佳方法 [英] The best way to detect any change to Internet Connection xcode swift

问题描述

我想知道是否有最好的方法来检测 Internet 连接发生的任何变化

我的意思是使用此代码

import SystemConfigurationvar isConnected: Bool = falsefunc isConnectedToNetwork(){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)让 defaultRouteReachability = withUnsafePointer(&zeroAddress) {SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0)).takeRetainedValue()}var 标志:SCNetworkReachabilityFlags = 0如果 SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == 0 {self.isConnected = false}让 isReachable = (flags & UInt32(kSCNetworkFlagsReachable)) != 0让需要连接 = (标志 & UInt32(kSCNetworkFlagsConnectionRequired)) != 0if isReachable &&!needsConnection{self.isConnected = 真}别的{self.isConnected = false}}

它返回 Internet 连接的状态，但即使我需要在应用程序运行时不断检查 Internet 连接，所以我使用了此代码

NSTimer.scheduledTimerWithTimeInterval(10, target: self, selector: Selector("isConnectedToNetwork"), userInfo: nil, repeats: true)

它每 10 秒检查一次互联网连接，但我相信有更好的方法.我的意思是使用观察者或其他东西.

比如这个

NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardDidShow", name: UIKeyboardDidShowNotification, object: nil)

当键盘显示它检测到它并调用函数keyboardDidShow()

解决方案

Swift 3.0+

这是我设法达到的最干净的解决方案.

您需要安装此 pod https://github.com/AFNetworking/AFNetworking>

然后在您声明 NetworkReachability 类的地方 import AFNetworking.

final class NetworkReachability {私有变量previousStatus:AFNetworkReachabilityStatus = .unknown///检索当前网络状态一次并停止监视可达性.func getCurrentNetworkStatus(完成:((AFNetworkReachabilityStatus)-> Void)?){以前的状态 = .unknownstartMonitoring { currentStatus in完成?(当前状态)self.stopMonitoring()}}///监控网络可达性变化，直到出现可达状态.然后停止监控.func getReachableNetworkStatus(完成:((AFNetworkReachabilityStatus)-> Void)?){停止监控()startMonitoring { currentStatus in完成?(当前状态)if currentStatus == .reachableViaWiFi ||currentStatus == .reachableViaWWAN {self.stopMonitoring()}}}///监控网络可达性变化，直到调用 stopMonitoring().func startMonitoring(newStatusCallback: ((AFNetworkReachabilityStatus) -> Void)?) {AFNetworkReachabilityManager.shared().startMonitoring()AFNetworkReachabilityManager.shared().setReachabilityStatusChange { currentStatus in如果 currentStatus != .unknown &&currentStatus != self.previousStatus {newStatusCallback?(currentStatus)}self.previousStatus = currentStatus}}功能停止监控(){以前的状态 = .unknownAFNetworkReachabilityManager.shared().stopMonitoring()}}

I was wondering if there is a best way to detect any change happens to Internet Connection

i mean using this code

import SystemConfiguration
var isConnected: Bool = false
func isConnectedToNetwork()
{

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(nil, UnsafePointer($0)).takeRetainedValue()
}

var flags: SCNetworkReachabilityFlags = 0
if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == 0 {
    self.isConnected = false
}

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

if isReachable && !needsConnection
{
  self.isConnected = true
} 
else{
     self.isConnected = false
   }  
    }

it returns the status for Internet Connection, but even though i need to keep checking for Internet connection while the app is running so i used this code

NSTimer.scheduledTimerWithTimeInterval(10, target: self, selector: Selector("isConnectedToNetwork"), userInfo: nil, repeats: true)

Each 10 seconds it checks for internet connection, but i believe there is a better way. i mean using an observer or something else.

such as this one

NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardDidShow", name: UIKeyboardDidShowNotification, object: nil)

when the keyboard shows it detects it and calls the function keyboardDidShow()

解决方案

Swift 3.0+

This is the most clean solution I managed to reach.

You need to install this pod https://github.com/AFNetworking/AFNetworking

Then import AFNetworking where you declare NetworkReachability class.

final class NetworkReachability {
    private var previousStatus: AFNetworkReachabilityStatus = .unknown

    /// Retrieves current network status once and stops monitoring reachability.
    func getCurrentNetworkStatus(completion: ((AFNetworkReachabilityStatus) -> Void)?) {
        previousStatus = .unknown
        startMonitoring { currentStatus in
            completion?(currentStatus)
            self.stopMonitoring()
        }
    }

    /// Monitors network reachability changes until reachable status is present. Then stops monitoring.
    func getReachableNetworkStatus(completion: ((AFNetworkReachabilityStatus) -> Void)?) {
        stopMonitoring()
        startMonitoring { currentStatus in
            completion?(currentStatus)
            if currentStatus == .reachableViaWiFi || currentStatus == .reachableViaWWAN {
                self.stopMonitoring()
            }
        }
    }

    /// Monitors network reachability changes, until stopMonitoring() is called.
    func startMonitoring(newStatusCallback: ((AFNetworkReachabilityStatus) -> Void)?) {
        AFNetworkReachabilityManager.shared().startMonitoring()
        AFNetworkReachabilityManager.shared().setReachabilityStatusChange { currentStatus in
            if currentStatus != .unknown && currentStatus != self.previousStatus {
                newStatusCallback?(currentStatus)
            }
            self.previousStatus = currentStatus
        }
    }

    func stopMonitoring() {
        previousStatus = .unknown
        AFNetworkReachabilityManager.shared().stopMonitoring()
    }
}

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