可達性返回False的iOS中的蜂窩網絡 - 斯威夫特

Question

我有這個代碼檢查互聯網連接，它工作得很好，直到我更新到Xcode 8和Swift 3。現在它返回錯誤的蜂窩網絡和真正的WiFi網絡，我不知道爲什麼。

這是代碼：

open 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 
    } 

    let isReachable = flags == .reachable 
    let needsConnection = flags == .connectionRequired 

    return isReachable && !needsConnection 

    } 
} 

現在如何針對WiFi和蜂窩連接此函數返回true？

Answer 1

我使用下面的代碼，它的工作完美。

對於Swift3

import Foundation 
import SystemConfiguration 

public 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) { 
      $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) 
    } 

} 

通過調用：

if Reachability.isConnectedToNetwork() == true { 
    xy 
} else { 
    yz 
} 

夫特2（用於進一步觀衆）

import Foundation 
import SystemConfiguration 

public class Reachability { 

    class func isConnectedToNetwork() -> Bool { 

     var zeroAddress = sockaddr_in() 
     zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress)) 
     zeroAddress.sin_family = sa_family_t(AF_INET) 

     guard let defaultRouteReachability = withUnsafePointer(&zeroAddress, { 
      SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($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) 
    } 
} 

同一呼叫中夫特3

Answer 2

這是Apple的Reachability框架的快速實現。考慮使用它，這可能會解決您的問題。 Reachability

要檢查用戶是否連接到互聯網

let reachability = Reachability() 
if reachability.isReachable{ 
//Network is reachable 
}else{ 
//Not reachable 
} 

它還具有whenReachable，whenUnreachable封鎖和ReachabilityChangedNotification通知，你可以用它來檢查當互聯網連接可用和不可用時把如此你可以相應地處理這些事件