我正在使用Reachability类来检查我何时收到互联网连接.
这是我的代码：
IN VIEW DID LOAD:
internetReachable = [Reachability reachabilityForInternetConnection];
[internetReachable startNotifier];
// check if a pathway to a random host exists
hostReachable = [Reachability reachabilityWithHostname:@"www.google.com"];
[hostReachable startNotifier];
Then the notification method
-(void) checkNetworkStatus:(NSNotification *)notice
{
// called after network status changes
NetworkStatus internetStatus = [internetReachable currentReachabilityStatus];
switch (internetStatus)
{
case NotReachable:
{
NSLog(@"The internet is down. IN AGENDA");
self.internetActive = NO;
break;
}
case ReachableViaWiFi:
{
NSLog(@"The internet is working via WIFI.IN AGENDA");
self.internetActive = YES;
break;
}
case ReachableViaWWAN:
{
NSLog(@"The internet is working via WWAN.IN AGENDA");
self.internetActive = YES;
break;
}
}
NetworkStatus hostStatus = [hostReachable currentReachabilityStatus];
switch (hostStatus)
{
case NotReachable:
{
NSLog(@"A gateway to the host server is down.IN AGENDA");
self.hostActive = NO;
break;
}
case ReachableViaWiFi:
{
NSLog(@"A gateway to the host server is working via WIFI.IN AGENDA");
self.hostActive = YES;
break;
}
case ReachableViaWWAN:
{
NSLog(@"A gateway to the host server is working via WWAN.IN AGENDA");
self.hostActive = YES;
break;
}
}
}
And finally how I add en remove the observer
-(void)viewWillAppear:(BOOL)animated{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkNetworkStatus:) name:kReachabilityChangedNotification object:nil];
}
-(void)viewDidDisappear:(BOOL)animated{
[[NSNotificationCenter defaultCenter] removeObserver:self name:kReachabilityChangedNotification object:nil];
}
问题
似乎viewcontroller多次获取通知.
这是我的NSLOG
2014-01-04 10:32:16.299 Adsolut[10009:333b] CALLED reachabilityChanged 2014-01-04 10:32:16.299 Adsolut[10009:470b] CALLED reachabilityChanged 2014-01-04 10:32:16.300 Adsolut[10009:70b] The internet is down. IN AGENDA 2014-01-04 10:32:16.301 Adsolut[10009:70b] A gateway to the host server is down.IN AGENDA 2014-01-04 10:32:16.301 Adsolut[10009:70b] The internet is down. IN AGENDA 2014-01-04 10:32:16.302 Adsolut[10009:70b] A gateway to the host server is down.IN AGENDA 2014-01-04 10:32:16.313 Adsolut[10009:470b] CALLED reachabilityChanged 2014-01-04 10:32:16.313 Adsolut[10009:4a03] CALLED reachabilityChanged 2014-01-04 10:32:16.314 Adsolut[10009:70b] The internet is working via WIFI.IN AGENDA 2014-01-04 10:32:16.314 Adsolut[10009:333b] CALLED reachabilityChanged 2014-01-04 10:32:16.315 Adsolut[10009:70b] A gateway to the host server is down.IN AGENDA 2014-01-04 10:32:16.314 Adsolut[10009:f63] CALLED reachabilityChanged 2014-01-04 10:32:16.315 Adsolut[10009:70b] The internet is working via WIFI.IN AGENDA 2014-01-04 10:32:16.316 Adsolut[10009:70b] A gateway to the host server is down.IN AGENDA 2014-01-04 10:32:16.316 Adsolut[10009:70b] The internet is working via WIFI.IN AGENDA 2014-01-04 10:32:16.317 Adsolut[10009:70b] A gateway to the host server is down.IN AGENDA 2014-01-04 10:32:16.317 Adsolut[10009:70b] The internet is working via WIFI.IN AGENDA 2014-01-04 10:32:16.318 Adsolut[10009:70b] A gateway to the host server is down.IN AGENDA
有人可以帮忙吗？
解决方法
仅在appdelegate didFinishLaunchingWithOptions中添加可达性通知,并在appDelegate中设置Bool变量isInternetAvailable中的可达性值
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(checkNetworkStatus:)
name:kReachabilityChangedNotification object:nil];
}
- (void)checkNetworkStatus:(NSNotification *)notice {
// called after network status changes
NetworkStatus internetStatus = [self.internetReachable currentReachabilityStatus];
switch (internetStatus)
{
case NotReachable:
{
//#######NSLog(@"The internet is down.");
self.isInternetAvailable = FALSE;
break;
}
case ReachableViaWiFi:
{
//#######NSLog(@"The internet is working via WIFI");
self.isInternetAvailable = TRUE;
break;
}
case ReachableViaWWAN:
{
//#######NSLog(@"The internet is working via WWAN!");
self.isInternetAvailable = TRUE;
break;
}
default:
{
//#######NSLog(@"The internet is working via mobile SIM!");
self.isInternetAvailable = FALSE;
break;
}
}
}
