如何在 swift 2.2 中检查 3G、4G 和 wifi 互联网连接 [英] How to check 3G,4G and wifi internet connection in swift 2.2

问题描述

导入基础导入系统配置

公共类可达性{

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

}

}

我正在使用上面编写的代码来检查我的应用程序的互联网连接，这仅检查 3G 和 WIFI 连接.但我还需要检查 4G 连接.谁能帮我找到解决方案.

I am using the above written code for checking internet connection for my app, this checks only 3G and WIFI connections. But I need to check for 4G Connections also. Can anyone help me to find the solution.

推荐答案

这里是 Reachability 来自 Apple，您需要下载 Reachability.h/.m 并将其拖到您的项目中.

Here is the Reachability from Apple, you need to download and drag Reachability.h/.m to your project.

然后导入 CoreTelephony 并尝试以下操作.

Then import CoreTelephony and try below.

    if let reachability = Reachability.forInternetConnection() {
        reachability.startNotifier()
        let status = reachability.currentReachabilityStatus()
        if status == .init(0) {
            // .NotReachable
            print("Not Reachable")
        }
        else if status == .init(1) {
            // .ReachableViaWiFi
            print("Reachable Via WiFi")

        }
        else if status == .init(2) {
            // .ReachableViaWWAN
            let netInfo = CTTelephonyNetworkInfo()
            if let cRAT = netInfo.currentRadioAccessTechnology  {
                switch cRAT {
                case CTRadioAccessTechnologyGPRS,
                     CTRadioAccessTechnologyEdge,
                     CTRadioAccessTechnologyCDMA1x:
                    print("Reachable Via 2G")
                case CTRadioAccessTechnologyWCDMA,
                     CTRadioAccessTechnologyHSDPA,
                     CTRadioAccessTechnologyHSUPA,
                     CTRadioAccessTechnologyCDMAEVDORev0,
                     CTRadioAccessTechnologyCDMAEVDORevA,
                     CTRadioAccessTechnologyCDMAEVDORevB,
                     CTRadioAccessTechnologyeHRPD:
                    print("Reachable Via 3G")
                case CTRadioAccessTechnologyLTE:
                    print("Reachable Via 4G")
                default:
                    fatalError("error")
                }
            }
        }
    }

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