代码语言：javascript复制
1 import UIKit
2 import Alamofire
3
4 class MyNetworkReachabilityManager {
5
6 private static let sharedInstance =
MyNetworkReachabilityManager()
7 var manager =
NetworkReachabilityManager(host：“www.baidu.com”)
8
9 init(){
10 manager？.listener = { status in
11 print(“Network Status Changed：(status)”)
12 }
13 manager？.startListening()
14 }
15 class var sharedManager：
MyNetworkReachabilityManager {
16
17 let instance = self.sharedInstance
18 return instance
19 }
20
21 func networkReachabilityStatus() ->
Alamofire.NetworkReachabilityManager.NetworkReachabilityStatus
{
22 let status：
Alamofire.NetworkReachabilityManager.NetworkReachabilityStatus
= (manager？.networkReachabilityStatus)！
23 print(“当前网络状态：(status)”)
24 return status
25 }
26}
27 import UIKit
28 import Alamofire
29
30 class ViewController：UIViewController {
31 override func viewDidLoad() {
32 super.viewDidLoad()
33 // Do any additional setup after loading the view,
typically from a nib.
34 }
35
36 @IBAction func
touchupInsideCheckBtnAction(sender：UIButton) {
37 var message = “当前无网络”
38 let status：
NetworkReachabilityManager.NetworkReachabilityStatus =
MyNetworkReachabilityManager.sharedManager.networkReachabilityStatus()
39
40 switch status {
41 case .notReachable：
42 message = “当前无网络”
43 print(“当前无网络”)
44 break
45 case
.reachable(NetworkReachabilityManager.ConnectionType.ethernetOrWiFi)：
46 message = “是WIFI网络”
47 print(“是WIFI网络”)
48 break
49 case
.reachable(NetworkReachabilityManager.ConnectionType．
wwan)：
50 message = “是3G或4G网络”
51 print(“是3G或4G网络”)
52 break
53
54 default：
55 message = “当前无网络”
56 break
57 }
58
59 let alert = UIAlertController(title：“Information”,
message：message, preferredStyle：
UIAlertControllerStyle.alert)
60 let OKAction = UIAlertAction(title：“OK”, style：
UIAlertActionStyle.default, handler：nil)
61 alert.addAction(OKAction)
62 self.presentViewController(alert, animated：true,
completion：nil)
63 }
64 }
