IOS programming-Network Monitoring

IOS programming-Network Monitoring

 

In network applications, You need to monitor the network status of your devices in real time for two purposes:

(1) let users know their network status and prevent misunderstandings (for example, the application is incompetent)

(2) Smart processing based on the user's network status, saving user traffic and improving user experience

WIFIG Network: Automatically downloads HD Images

Low-speed network: only downloading thumbnails

No network: Only offline cached data is displayed.

Apple officially provides an example program called Reachability to help developers detect the network status.

Www.bkjia.com

 

2. Monitoring Network Status

Reachability usage steps

Add framework SystemConfiguration. framework

Add source code

　

Include header files

# Import Reachability. h

# Import QYViewController. h

# Import Reachability. h

@ Interface QYViewController ()

@ Property (nonatomic, strong) Reachability * conn;

@ End

 

@ Implementation QYViewController

 

-(Void) viewDidLoad

{

[Super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

[[Nsicationcenter center defacenter center] addObserver: self selector: @ selector (networkStateChange) name: kReachabilityChangedNotification object: nil];

Self. conn = [Reachability reachabilityForInternetConnection];

[Self. conn startNotifier];

 

}

 

-(Void) dealloc

{

[Self. conn stopNotifier];

[[Nsicationcenter center defacenter center] removeObserver: self];

}

 

-(Void) networkStateChange

{

[Self checkNetworkState];

}

-(Void) checkNetworkState

{

// 1. Check the wifi status

Reachability * wifi = [Reachability reachabilityForLocalWiFi];

// 2. Check whether the mobile phone can be connected to the network (wifig.5 g)

Reachability * conn = [Reachability reachabilityForInternetConnection];

 

// 3. Determine the network status

If ([wifi currentReachabilityStatus]! = NotReachable) {// wifi available

NSLog (@ wifi available );

 

} Else if ([conn currentReachabilityStatus]! = NotReachable) {// no wifi is used. Use the network provided by your mobile phone to access the Internet.

NSLog (@ use your mobile phone to access the Internet );

 

} Else {// No network

NSLog (@ No network );

}

}