使用SWIFT检查互联网连接

Question

使用SWIFT检查互联网连接当我试图在我的iPhone上检查互联网连接时，我会发现很多错误。有人能帮我解决这个问题吗？守则：import Foundationimport SystemConfigurationpublic class Reachability {class func isConnectedToNetwork() -> Bool {     var zeroAddress = sockaddr_in()     zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))     zeroAddress.sin_family = sa_family_t(AF_INET)     let defaultRouteReachability = withUnsafePointer(&zeroAddress) {         SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))     }     var flags: SCNetworkReachabilityFlags = 0     if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == 0 {         return false     }     let isReachable = (flags & UInt32(kSCNetworkFlagsReachable)) != 0     let needsConnection = (flags & UInt32(kSCNetworkFlagsConnectionRequired)) != 0     return (isReachable && !needsConnection) ? true : false}}如果它不可读，错误1说：“int”不可转换为“SCNetworkReacabilityFlags”错误2和3：无法找到接受所提供的参数的“init”重载

Answer 1

对于SWIFT 3，SWIFT 4(与蜂窝和Wi-Fi一起工作)：

import SystemConfigurationpublic 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
        }

        /* Only Working for WIFI
        let isReachable = flags == .reachable
        let needsConnection = flags == .connectionRequired

        return isReachable && !needsConnection
        */

        // 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    }}

用法：

if Reachability.isConnectedToNetwork(){
    print("Internet Connection Available!")}else{
    print("Internet Connection not Available!")}