檢測設備是否超出WiFi範圍

有任何事件或任何其他方式來檢測iPad或iPhone何時超出特定WiFi範圍。我搜索了這一點，只能找到可達性類，這也是我將不得不在連續檢查連接，這是不是在我的情況下首選。任何幫助將不勝感激...檢測設備是否超出WiFi範圍

2012-12-19 spider1983

好，如果你應該這樣做的方式是「不首選」，還有什麼是首選？ – jimpic

連續檢查wifi會減慢我的應用程序，因爲我已經有太多的後臺事件正在進行。如果我能得到一個事件，那麼將是最好的事情。 – spider1983

檢查http://stackoverflow.com/questions/11083369/ios-wifi-notification-api – jimpic

這是示例代碼，你可以用它來找到WIFI /互聯網conncetivity

.h文件中

@class Reachability; 

@interface AppDelegate : UIResponder <UIApplicationDelegate> 
{ 
    Reachability* wifiReach; 
}

.m文件

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; 
    // Override point for customization after application launch 
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) { 
     self.viewController = [[HPViewController alloc] initWithNibName:@"HPViewController_iPhone" bundle:nil]; 
    } else { 
     self.viewController = [[HPViewController alloc] initWithNibName:@"HPViewController_iPad" bundle:nil]; 
    } 

    _navCon =[[UINavigationController alloc] initWithRootViewController:self.viewController]; 
    self.window.rootViewController = _navCon; 

    // Observe the kNetworkReachabilityChangedNotification. When that notification is posted, the 
    // method "reachabilityChanged" will be called. 
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reachabilityChanged:) name: kReachabilityChangedNotification object: nil]; 
    //Change the host name here to change the server your monitoring 
    wifiReach = [[Reachability reachabilityForLocalWiFi] retain]; 
    [wifiReach startNotifier]; 
    [self showAlertOfInternetConncetion: wifiReach]; 

    return YES; 
} 
//Called by Reachability whenever status changes. 
- (void) reachabilityChanged: (NSNotification*)note 
{ 
    Reachability* curReach = [note object]; 
    NSParameterAssert([curReach isKindOfClass: [Reachability class]]); 
    [self showAlertOfInternetConncetion: curReach]; 
} 
- (void)showAlertOfInternetConncetion : (Reachability*) curReach 
{ 
    NetworkStatus netStatus = [curReach currentReachabilityStatus]; 
    switch (netStatus) 
    { 
     case NotReachable: 
     { 
      UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Internet connection" message:@"Your internet connection has stopped working. Please check it." delegate:self cancelButtonTitle:nil otherButtonTitles:@"Exit App", nil]; 
      [alert show]; 
      [alert release]; 
     } 
     case ReachableViaWWAN: 
     { 
      NSLog(@"ReachableVia WWAN"); 
     } 
     case ReachableViaWiFi: 
     { 
      NSLog(@"ReachableVia WiFi"); 
     } 
    } 
} 
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex 
{ 
    if (buttonIndex == 0) { 
     exit(0); 
    } 
}

來源

2012-12-19 10:53:26

感謝您的答案將今天自己嘗試.... – spider1983

@ spider1983你試過這個，發現它的工作原理？如果沒有，請不要接受答案，直到您確定他們回答您的問題。此外，這只是你說你已經找到的可達性代碼，它不會爲你工作..... –

@NickBull哦確定我確定我已經退出知道方式本身...我會糾正.. .. 。我爲此感到抱歉。 – spider1983

使用Apple的SCNetworkReachability類。閱讀SCNetworkReachability documentation。測試使用：

(ReachabilityInst.currentReachabilityStatus().value == ReachableViaWiFi.value)

來源

2016-02-11 08:19:21

檢測設備是否超出WiFi範圍

回答

相關問題