Question

我正试图使用AFNetworking检测互联网是否正常运行;在这里提到答案 AFNetworking 2.0 Reachability。我能够检测到设备是连接WiFi还是3G ..

问题是实际上互联网不能像WIFI一样工作，但互联网不起作用。

我如何检测互联网是否有效。就像我们检查使用ping ....

我正在使用以下

进行检查

-(BOOL)connected {

  __block BOOL reachable;

// Setting block doesn't means you area running it right now
[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {

    switch (status) {
        case AFNetworkReachabilityStatusNotReachable:
            NSLog(@"No Internet Connection");
            reachable = NO;
            break;
        case AFNetworkReachabilityStatusReachableViaWiFi:
            NSLog(@"WIFI");

            reachable = YES;
            break;
        case AFNetworkReachabilityStatusReachableViaWWAN:
            NSLog(@"3G");
            reachable = YES;
            break;
        default:
            NSLog(@"Unkown network status");
            reachable = NO;
            break;

    }
}];
// and now activate monitoring
[[AFNetworkReachabilityManager sharedManager] startMonitoring];

return reachable;

}

Answer 1

添加通知观察员以了解网络状态的变化。就像在完成启动类

下的app delegate类中添加以下代码一样

 [[AFNetworkReachabilityManager sharedManager] startMonitoring];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveNetworkChnageNotification:) name:AFNetworkingReachabilityDidChangeNotification object:nil];

在.h文件中添加全局警报视图。因为它会在网络状态变化时出现和消失。

这里是通知功能：

- (void)receiveNetworkChnageNotification:(NSNotification *)notification
{
    if (![self isReachable])
    {
        self.alertView = [[UIAlertView alloc] initWithTitle:@"No Internet Connection" message:@"You have no internet connection on your device, please check and try again later." delegate:nil cancelButtonTitle:@"Cancel" otherButtonTitles:nil];
        [self.alertView show];
    }
    else
    {
        [self.alertView dismissWithClickedButtonIndex:0 animated:YES];
    }
}

Answer 2

您可以使用“可访问性”来确定您是否具有到网络的功能连接。但是，如果您确实需要确定您有可行的互联网连接，那么最好的方法是尝试建立实际连接并检查结果。使用NSURLConnection。

NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.apple.com/"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
NSMutableData *receivedData = [NSMutableData dataWithCapacity:0];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

if(!theConnection) { // Something went wrong.
    receivedData = nil;
}

要确定您是否建立了可行的连接，请使用委托方法检查连接的结果：

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    NSLog(@"Connection failed! Error - %@ %@", [error localizedDescription],
        [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
}

如何在ios中检查Internet是否正常工作

2 个答案: