Quick way to determine current Network Connection Type (Offline, WiFi, or Cellular)

Reachability.swift

//
//  Reachability.swift
//  
//
//  Created by Andy Liang on 2016-03-06.
//  Copyright © 2015 Andy Liang. All rights reserved.
//

import SystemConfiguration

enum ConnectionType {
    case Offline
    case WiFi
    case Cellular
}

struct Reachability {
    
    static func currentConnectionType() -> ConnectionType {
        var zeroAddress = sockaddr_in()
        bzero(&zeroAddress, sizeofValue(zeroAddress))
        zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)
        guard let reachability = withUnsafePointer(&zeroAddress, {
            SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
        }) else {
            return .Offline
        }
        
        var flags: SCNetworkReachabilityFlags = []
        if !SCNetworkReachabilityGetFlags(reachability, &flags) {
            return .Offline
        }
        
        switch (flags.contains(.Reachable), flags.contains(.IsWWAN)) {
        case (false, _):
            return .Offline
        case (true, true):
            return .Cellular
        case (true, false):
            return .WiFi
        }
    }
    
}