IOS代码笔记之网络嗅探功能

#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 

#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;
  
  
  //启动网络嗅探功能
  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 -网络嗅探
- (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网络" 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:@"您正在使用移动网络，运营商会收取流量费，建议使用WiFi网络" 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:@"没有网络" message:Nil delegate:self cancelButtonTitle:Nil otherButtonTitles:@"本次不再提醒",@"知道了", nil];
      [alert show];
      break;
    }
  }
}