【代碼筆記】網路嗅探

一，效果圖。

二，工程圖。

三，代碼。

AppDelegate.h

#import <UIKit/UIKit.h>
#import "Reachability.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate>
{
     Reachability *reachability;
     BOOL WarningViaWWAN;
}

@property (strong, nonatomic) UIWindow *window;


- (void)ReachabilitySniff:(Reachability*) curReach;
- (void)ReachabilitySniffNotification:(NSNotification* )notification;
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex;

@end

AppDelegate.m

#import "AppDelegate.h"
#import "RootViewController.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    
    RootViewController *rootVC=[[RootViewController alloc]init];
    UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:rootVC];
    self.window.rootViewController=nav;
    
    
    //啟動網路嗅探功能
    WarningViaWWAN = TRUE;
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(ReachabilitySniffNotification:) name:kReachabilityChangedNotification object:nil];
    
    if (!reachability) {
        reachability = [Reachability reachabilityForInternetConnection];
    }
    [reachability startNotifier];
    
    [self performSelector:@selector(ReachabilitySniff:) withObject:reachability afterDelay:20];

    
    
    
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}
#pragma mark -網路嗅探
- (void)ReachabilitySniffNotification:(NSNotification* )notification
{
    Reachability* curReach = [notification object];
    [self performSelector:@selector(ReachabilitySniff:) withObject:curReach afterDelay:2];
}

- (void)ReachabilitySniff:(Reachability*) curReach
{
    NSLog(@"ReachabilitySniffNewWorkStatus");
    if (!curReach) {
        return;
    }
    NetworkStatus status = [curReach currentReachabilityStatus];
    switch (status) {
        case ReachableViaWiFi:
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"您正在使用WiFi網路" message:Nil delegate:self cancelButtonTitle:Nil otherButtonTitles:@"本次不再提醒",@"知道了", nil];
            [alert show];
            break;
        }
        case ReachableViaWWAN:
        {
             UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"您正在使用移動網路，運營商會收取流量費，建議使用WiFi網路" message:Nil delegate:self cancelButtonTitle:Nil otherButtonTitles:@"本次不再提醒",@"知道了", nil];
                [alert show];
             break;
        }
        case NotReachable:
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"沒有網路" message:Nil delegate:self cancelButtonTitle:Nil otherButtonTitles:@"本次不再提醒",@"知道了", nil];
            [alert show];
            break;
        }
    }
}