How to get Apps Using WLAN & Cellular Setting setting status in the picture below ?
How can I check that status(None, WLAN, WLAN&Cellular) for my App, so that I can show an alert to remind user of open this switch ~
When Reachability is NotReachable, there are 2 situation ,
The wifi is not connected
The Apps Using WLAN & Cellular Setting
is off
If we can get the SSID of current wifi, we can judge that the wifi is connected and the network switch is off ~
#import <SystemConfiguration/CaptiveNetwork.h>
BOOL networkSwitchOff = NO;
Reachability *reach = [Reachability reachabilityForInternetConnection];
NetworkStatus status = [reach currentReachabilityStatus];
if(status==NotReachable){ //Reachability NotReachable
NSArray *supportedInterfaces = (__bridge_transfer id)CNCopySupportedInterfaces();
id info = nil;
NSString *ssid = nil;
for (NSString *networkInfo in supportedInterfaces) {
info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)networkInfo);
if (info && [info count])
break;
}
if (info) {
NSDictionary *dctySSID = (NSDictionary *)info;
//we can't get ssid if wifi is not connected
ssid = [dctySSID objectForKey:#"SSID"];
}
networkSwitchOff = (ssid!=nil);
}
Related
I want to be able to check to see if the user is connected to WiFi, but not connected to a network. So basically I want to check the state of the WiFi button on the device setting page to check if button is enabled or disabled.
At the moment I can check to see if the Wifi is connected to a network or not connected to an network doing the following:
BOOL hasWiFiNetwork = NO;
NSArray *interfaces = CFBridgingRelease(CNCopySupportedInterfaces());
for (NSString *interface in interfaces)
{
NSDictionary *networkInfo = CFBridgingRelease(CNCopyCurrentNetworkInfo((__bridge CFStringRef)(interface)));
if (networkInfo != NULL)
{
hasWiFiNetwork = YES;
break;
}
else
{
hasWiFiNetwork = NO;
break;
}
}
Try this code and use Reachability class.
BOOL isConnectedProperly = ([[Reachability reachabilityForInternetConnection] currentReachabilityStatus] == ReachableViaWiFi);
Update
It turns out that it isn't possible, there is no API/Framework/BOOL value that can do this because Apple havn't added any kind of ability to check to see if the WiFi is switched on or off for developers. As explained nicely here: https://stackoverflow.com/a/12906461/4657588
Then this SO post should be what you want: https://stackoverflow.com/a/7938778/4657588
Reachability *reachability = [Reachability reachabilityForInternetConnection];
[reachability startNotifier];
NetworkStatus status = [reachability currentReachabilityStatus];
if (status == ReachableViaWiFi) {
// WiFi
}
else {
// Either WiFi is off or we are not connected to a WiFi network.
}
First you need to download reachability file from apple developer site
and after that add these piece of code every time where ever yu want to check.
-(BOOL)isConnectedTointernet{
BOOL status = NO;
Reachability *reachability = [Reachability reachabilityForInternetConnection];
int networkStatus = reachability.currentReachabilityStatus;
status = (networkStatus != NotReachable)? YES:NO;
return status;}
Is it possible to query WiFi state (enabled/disabled) on iOS programmatically? The query should return true when WiFi is enabled and device is not connected to any network.
EDIT: I am aware of the functionality provided by Reachability class and as far as I understand it does not recognize enabled but not connected state of WIFI. I.e. the following code will return NetworkStatus NotReachable, which is not what I need.
Reachability* r = [Reachability reachabilityForLocalWiFi];
NetworkStatus ns = [r currentReachabilityStatus];
Disclaimer: The following solution is not robust and there is no guarantee it will pass AppStore.
The only viable solution I was able to find so far is to request and evaluate a list of available interfaces using getifaddrs function. The list looks differently in case WiFi disabled/enabled/connected:
NSCountedSet * cset = [NSCountedSet new];
struct ifaddrs *interfaces;
if( ! getifaddrs(&interfaces) ) {
for( struct ifaddrs *interface = interfaces; interface; interface = interface->ifa_next) {
if ( (interface->ifa_flags & IFF_UP) == IFF_UP ) {
[cset addObject:[NSString stringWithUTF8String:interface->ifa_name]];
}
}
}
freeifaddrs(interfaces);
return [cset countForObject:#"awdl0"] > 1 ? WIFI_ON : WIFI_OFF;
You can use Reachability to check this. Import the files, then you can do this:
Reachability *networkReachability = [Reachability reachabilityWithHostName:#"http://google.com];
NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];
if (networkStatus == ReachableViaWiFi) {
//wifi
}
You could use the Reachability class that apple has provided here then check for this:
[Reachability reachabilityForLocalWiFi];
I wrote a connection checker using Apple's Reachability class' reachabilityWithHostName: method. Here is my code.
-(BOOL)checkConnection{
Reachability *reachability = [Reachability reachabilityWithHostName:#"www.example.com"];
NetworkStatus remoteHostStatus = [reachability currentReachabilityStatus];
if (remoteHostStatus != NotReachable) {
return YES;
}
else {return NO;}
}
SO here is the use cases:
if I have wifi connection** : returns YES as expected.
If I have cellular connection : returns YES as expected.
If cellular and Wifi is disabled : returns NO as expected.
If I have WiFi connection; but the DSL cable is unplugged (so the host shouldn't
be reachable, internet connection is not available.) : returns YES and it's unexpected.
Also if cellular is enabled but at my current position I have no signal : returns YES and it's unexpected.
How can I solve these unexpected results?
Thank you.
With #Martin Koles' help I added a html file into the server. It only has a random value inside. Now I check reachability. If server is reachable, I am trying to get the value from html file. Than, if I could get the value returning YES. If I couldn't (the serverValue should be nil) returning NO..
-(BOOL)checkConnection{
Reachability *reachability = [Reachability reachabilityWithHostName:#"www.izmirmobil.com"];
NetworkStatus remoteHostStatus = [reachability currentReachabilityStatus];
if (remoteHostStatus != NotReachable) {
NSURL *url = [NSURL URLWithString:#"http://www.example.com/getAValue.html"];
NSError *errr = nil;
NSStringEncoding enc;
NSString *serverValue = [[NSString alloc] initWithContentsOfURL:url usedEncoding:&enc error:&errr];
if(serverValue)return YES;
else return NO;
}
else {return NO;}
}
Hi i need to find out whether iPhone internet connected 3G or 2G or WIFI network
any suggestions
Thanks
Sravan
Download Reachability Class for iOS from this link:- https://github.com/tonymillion/Reachability
1)Add Reachability.h &.m in your Project, make sure you make it ARC compatible by adding flag -fno-objc-arc
2)Now, check the connection type in your view controller
Reachability *reachability = [Reachability reachabilityForInternetConnection];
[reachability startNotifier];
NetworkStatus status = [reachability currentReachabilityStatus];
if(status == NotReachable)
{
//No internet
}
else if (status == ReachableViaWiFi)
{
//WiFi
}
else if (status == ReachableViaWWAN)
{
//3G
}
You can use the Reachability library written by tonymillion.
If you don't wan to use ARC, there is also the Apple Reachability library.
Also take a look inside of < CoreTelephony/CTTelephonyNetworkInfo.h >
You will see that there is a currentRadioAccessTechnology property exposed on CTTelephonyNetworkInfo.
CTTelephonyNetworkInfo *netInfo = [[CTTelephonyNetworkInfo alloc] init];
NSLog(#"Radio access technology:\n%#",
netInfo.currentRadioAccessTechnology);
You can subscribe to changes via:
[NSNotificationCenter.defaultCenter
addObserverForName:CTRadioAccessTechnologyDidChangeNotification
object:nil
queue:nil
usingBlock:^(NSNotification __unused *notification) {
CTTelephonyNetworkInfo *current =
[[CTTelephonyNetworkInfo alloc] init];
NSLog(#"Updated Radio access technology:\n%#",
current.currentRadioAccessTechnology);
}];
This question already has answers here:
How can I check for an active Internet connection on iOS or macOS?
(46 answers)
Closed 9 years ago.
I have the following code:
- (void) testInternetConnection {
internetConnection = [Reachability reachabilityWithHostname:#"www.google.com"];
// Internet is reachable
internetConnection.reachableBlock = ^(Reachability*reach)
{
// Update the UI on the main thread
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(#"Yayyy, we have the interwebs!");
});
};
// Internet is not reachable
internetConnection.unreachableBlock = ^(Reachability*reach)
{
// Update the UI on the main thread
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(#"Someone broke the internet :(");
});
};
[internetConnection startNotifier];
}
How do I tell if my internet has changed using the notifier? I understand the singleton method and use that when needed.
try to test your code on device when ever possible.
ensure
BOOL status = ([[Reachability reachabilityForInternetConnection] currentReachabilityStatus] != NotReachable)
, on device if you are testing in simulator
The simulator just uses your default Mac network connection so you need to disconnect your mac from the network and the simulator will experience the same loss of network connectivity.
Thanks
you can check reachability by this code,
//to make reachability object
reachability = [Reachability reachabilityForInternetConnection];
//start notifier
[reachability startNotifier];
//get reachability status
remoteHostStatus = [reachability currentReachabilityStatus];
Thanks.
//First import Reachability classes
// In Appdelegate .h file create variables
Reachability *hostReach,*internetReach,*wifiReach;
Reachability *internetReachable;
// After that add this code didfinish lonching with options
internetReachable = [Reachability reachabilityForInternetConnection] ;
[internetReachable startNotifier];
-(BOOL) connectedToNetwork
{
const char *host_name = "www.google.com";
BOOL _isDataSourceAvailable = NO;
Boolean success;
SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithName(NULL,host_name);
SCNetworkReachabilityFlags flags;
success = SCNetworkReachabilityGetFlags(reachability, &flags);
_isDataSourceAvailable = success &&
(flags & kSCNetworkFlagsReachable) &&
!(flags & kSCNetworkFlagsConnectionRequired);
CFRelease(reachability);
return _isDataSourceAvailable;
}