[SWIFT]네트워크 상태체크

import SystemConfiguration

/// 네트워크 상태 확인 (싱글톤)
class DeviceManager {
    static let shared: DeviceManager = DeviceManager()
    
    var networkStatus: Bool {
        get {
            return checkDeviceNetworkStatus()
        }
    }
    
    private init() {
    }
    
    private func checkDeviceNetworkStatus() -> Bool {
        print("Check to Device Natwork Status....")
        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
    }
}

 

사용방법

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        //네트워크 연결상태 체크
        guard DeviceManager.shared.networkStatus else {
            let alert = UIAlertController(title: "네트워크 체크", message: "네트워크가 연결되어있지 않습니다.", preferredStyle: .alert)
            let okAction = UIAlertAction(title: "종료", style: .default) { (action) in
                exit(0)
            }
            alert.addAction(okAction)
            self.present(alert, animated: true, completion: nil)
            return
        }
        
 }