Question

我正在使用Tony Million的Reachability版本（问题与Apple的Reachability版本相同）来检查我的应用程序是否存在活动的互联网连接。

这就是我想要的：
当视图加载或出现时，它会检查是否存在互联网连接。如果没有，如果显示警报，并且单击，则再次尝试，直到存在活动连接。

如果存在连接，则视图正常加载。当Reachability通知连接丢失时，它会再次显示相同的警报。这是我的实际代码：

//in the implementation:
BOOL internetActivated;

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self testInternetConnection];
    NSLog(@"%d", internetActivated);
    if(internetActivated == NO)
    {
        UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Pas de connexion internet" message:@"Une connexion est requise pour utiliser l'application" delegate:self cancelButtonTitle:nil otherButtonTitles:@"Réessayer", nil];
        [alert show]; 
    }
    else {
        [self onAppearFunction];
    }
}


- (void)viewDidAppear:(BOOL)animated
{
    [self testInternetConnection];
    if(internetActivated == NO)
    {
        UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Pas de connexion internet" message:@"Une connexion est requise pour utiliser l'application" delegate:self cancelButtonTitle:nil otherButtonTitles:@"Réessayer", nil];
        [alert show]; 
    }
    else {
        [self onAppearFunction];
    }
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    if (buttonIndex == 0)
    {
        [self viewDidLoad];
    }
}

- (void)testInternetConnection
{
    __unsafe_unretained typeof(self) weakSelf = self;
    internetReachableFoo = [Reachability reachabilityWithHostname:@"www.google.com"];

    // Internet is reachable
    internetReachableFoo.reachableBlock = ^(Reachability*reach)
    {
        // Update the UI on the main thread
        dispatch_async(dispatch_get_main_queue(), ^{
            internetActivated = YES;
            NSLog(@"Yayyy, we have the interwebs!");
        });
    };

    // Internet is not reachable
    internetReachableFoo.unreachableBlock = ^(Reachability*reach)
    {
        // Update the UI on the main thread
        dispatch_async(dispatch_get_main_queue(), ^{
            internetActivated = NO;
            UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Pas de connexion internet" message:@"Une connexion est requise pour utiliser l'application" delegate:weakSelf cancelButtonTitle:nil otherButtonTitles:@"Réessayer", nil];
            [alert show];
            NSLog(@"Someone broke the internet :(");
        });
    };

    [internetReachableFoo startNotifier];
}

多个问题：
1）InternetActivated以“NO”开始，即使我在测试if条件之前调用[self testInternetConnection]。它应该更新为 YES ，不是吗？

2）即使我有互联网连接，UIAlertView方法中的testInternetConnection仍会被调用。实际上：调用第二个警报的三到四次（在testInternet方法中），然后调用第一个警报视图的三到四次，即viewDidLoad方法中的一个。

顺便说一下，我注意到这个NSLog：NSLog(@"Yayyy, we have the interwebs!"); 每次[self testInternetConnection]调用都会调用多次。

我完全弄乱了警报电话，这让我发疯了！

感谢您的帮助

更新：

我设法通过在加载BOOL时将BOOL设置为true来避免多重警报，并在单击时将其设置为false以避免堆叠多个警报。唯一的问题是我想在{... 1}} BOOL更新之前更新{<1}} BOOL。

Answer 1

从viewdidload中删除代码

Bool alertIsShowing = NO;

- (void)viewDidAppear:(BOOL)animated
{
    if (! alertIsShowing)
        [self testInternetConnection];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    alertIsShowing = NO;
    if (buttonIndex == 0)
    {
        [self testInternetConnection];
    }
}

- (void)testInternetConnection
{
    __unsafe_unretained typeof(self) weakSelf = self;
    internetReachableFoo = [Reachability reachabilityWithHostname:@"www.google.com"];

    // Internet is reachable
    internetReachableFoo.reachableBlock = ^(Reachability*reach)
    {
        // Update the UI on the main thread
        dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"Yayyy, we have the interwebs!");
            [self onAppearFunction];
        });
    };

    // Internet is not reachable
    internetReachableFoo.unreachableBlock = ^(Reachability*reach)
    {
        // Update the UI on the main thread
        dispatch_async(dispatch_get_main_queue(), ^{
            UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Pas de connexion internet" message:@"Une connexion est requise pour utiliser l'application" delegate:weakSelf cancelButtonTitle:nil otherButtonTitles:@"Réessayer", nil];
            [alert show];
            alertIsShowing = YES;
            NSLog(@"Someone broke the internet :(");
        });
    };

    [internetReachableFoo startNotifier];
}

ios - 可达性通知多个警报

1 个答案: