自動檢測我的手機是否連接到互聯網

Question

-(BOOL)IsConnectionAvailable{ 
    Reachability *reachability = [Reachability reachabilityForInternetConnection]; 
    NetworkStatus networkStatus = [reachability currentReachabilityStatus]; 
    return !(networkStatus == NotReachable); 
} 

我正在使用上面的代碼，並且必須定期調用以檢查是否有網絡連接。 我正在聊天應用程序，我想立即發送消息一個設備連接到網絡。

感謝

Answer 1

可以使用kReachabilityChangedNotification

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkForReachability:) name:kReachabilityChangedNotification object:nil]; 

} 

- (void) checkForReachability:(NSNotification *)notification 
{ 
    if([self IsConnectionAvailable])// use your method here 
    { 
     // net available 
    } 
    else 
    { 
     // no internet 
    } 

}