如何在ios中檢查互聯網連接？

Question

如何檢查應用程序是否已連接到互聯網？ 當前，我在我的appdelegate.m文件中使用此代碼

dispatch_queue_t connectivityThread = dispatch_queue_create("com.gm.kart.connectivity", NULL);

dispatch_async(connectivityThread, ^{
    while (true){
        if([GMMConnectivity hasConnectivity])
            NSLog(@"%@", @"connected");
        else
            NSLog(@"Not connected");

        usleep(10000000);
    }
});

當我單擊登錄按鈕時，我想使用NSnotificationcenter檢查互聯網是否已連接？

請幫我

Answer 1

下載后的例子如下。

http://developer.apple.com/iphone/library/samplecode/Reachability/index.html

您可以像下面的步驟一樣在項目中使用它：-

included Apple's Reachability.h & .m from their Reachability example.

add the SystemConfiguration framework.

將波紋管方法放入您的appdelegare.m文件中：-

- (BOOL) connectedToNetwork{
    Reachability* reachability = [Reachability reachabilityWithHostName:@"google.com"];
    NetworkStatus remoteHostStatus = [reachability currentReachabilityStatus];

    if(remoteHostStatus == NotReachable)
    {
        isInternet =NO;
    }
    else if (remoteHostStatus == ReachableViaWWAN)
    {
        isInternet = TRUE;
    }
    else if (remoteHostStatus == ReachableViaWiFi)
    { isInternet = TRUE;

    }
    return isInternet;
}

isInternet是您的.h類的BOOL

根據您的代碼：-

dispatch_queue_t connectivityThread = dispatch_queue_create("com.GMM.assamkart.connectivity", NULL);

dispatch_async(connectivityThread, ^{
    while (true){
       isInternet =[self connectedToNetwork];
    if (isInternet)
    {
           NSLog(@"connected");
        }
        else
        {
            NSLog(@"Not connected");
        }
       // usleep(10000000);
    }
});

Answer 2

-(BOOL) connectedToInternet

{
    NSString *URLString = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://www.google.com"]];

return ( URLString != NULL ) ? YES : NO;

}