ios - iOS编程中的可达性AlertView

因此，我使警报视图检测到是否存在 Activity 的互联网连接。

，这是代码:

- (void)viewDidLoad
{
    [super viewDidLoad];

    [[NSNotificationCenter defaultCenter] addObserver:self
    selector:@selector(reachabilityChanged:)
    name:kReachabilityChangedNotification
    object:nil];
    Reachability * reach = [Reachability reachabilityWithHostname:@"www.google.com"];
    reach.reachableBlock = ^(Reachability * reachability)
    {
     dispatch_async(dispatch_get_main_queue(), ^{
     blockLabel.text = @"";
     });
    };
    reach.unreachableBlock = ^(Reachability * reachability)
    {
     dispatch_async(dispatch_get_main_queue(), ^{
     blockLabel.text = @"You are not connected to the Internet";
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Please connect to Internet"
     message:nil
     delegate:self
     cancelButtonTitle:nil
     otherButtonTitles:nil];
     UIActivityIndicatorView *progress= [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(125, 50, 30, 30)];
     progress.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;
            [alert addSubview:progress];
            [progress startAnimating];
            [alert show];
        });
    };
    [reach startNotifier];
    // Do any additional setup after loading the view, typically from a nib.
}

因此，我的应用程序检测是否有Internet连接。但是问题是，如果我在iPhone上打开互联网并打开该应用程序，它仍然说没有互联网连接。我该怎么办…

最佳答案

好吧，我通过使用通知来解决此问题。参考代码

-(void)reachabilityChanged:(NSNotification*)note
{
    Reachability * reach = [note object];

    if([reach isReachable])
    {
        notificationLabel.text = @"Notification Says Reachable";
        NSLog(@"Internet is Up");
    }
    else
    {
        notificationLabel.text = @"Notification Says Unreachable";
        NSLog(@"Internet is Down");
    }
}

关于ios - iOS编程中的可达性AlertView，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/13519157/