Check Internet Connection fails in iOS 9? - ios

Question

after iOS 9, I used to check if my app had connection with my server with the next part of code, and If there is no response, I asked user to activate wifi, etc.
Alert which show the dialog:
#pragma mark - SHOW ALERTVIEW FOR IOS 7 or less AND IOS 8
-(void) alertNoInternet:(NSString*)alertTitle withMessage:(NSString *)alertMessage{
NSString *alert3gButtonText = #"Mobile Data";
NSString *alertWifiButtonText = #"WIFI";
NSString *alertCancelButtonText = #"Cancel";
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO( NSFoundationVersionNumber_iOS_8_0 ) ) {
NSLog(#"SQA: iOS 8 dialog process");
/*id rootViewController = [UIApplication sharedApplication].delegate.window.rootViewController;
if([rootViewController isKindOfClass:[UINavigationController class]])
{
rootViewController = [((UINavigationController *)rootViewController).viewControllers objectAtIndex:0];
}*/
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:alertTitle
message:alertMessage
preferredStyle:UIAlertControllerStyleActionSheet];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *action3g = [UIAlertAction actionWithTitle:alert3gButtonText
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action)
{
NSURL *urlCellular = [NSURL URLWithString:#"prefs:root=General&path=USAGE/CELLULAR_USAGE"];
if([[UIApplication sharedApplication] canOpenURL:urlCellular]) {
[[UIApplication sharedApplication] openURL:urlCellular];
}
[alertController dismissViewControllerAnimated:YES completion:nil];
//home button press programmatically
UIApplication *app = [UIApplication sharedApplication];
[app performSelector:#selector(suspend)];
//wait 2 seconds while app is going background
[NSThread sleepForTimeInterval:2.0];
//exit app when app is in background
exit(0);
}];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *actionWifi = [UIAlertAction actionWithTitle:alertWifiButtonText
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action)
{
NSURL *urlWifi = [NSURL URLWithString:#"prefs:root=WIFI"];
if ([[UIApplication sharedApplication] canOpenURL:urlWifi]) {
[[UIApplication sharedApplication] openURL:urlWifi];
}
[alertController dismissViewControllerAnimated:YES completion:nil];
//home button press programmatically
UIApplication *app = [UIApplication sharedApplication];
[app performSelector:#selector(suspend)];
//wait 2 seconds while app is going background
[NSThread sleepForTimeInterval:2.0];
//exit app when app is in background
exit(0);
}];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *actionCancel = [UIAlertAction actionWithTitle:alertCancelButtonText
style:UIAlertActionStyleCancel
handler:^(UIAlertAction * action)
{
[alertController dismissViewControllerAnimated:YES completion:nil];
//home button press programmatically
UIApplication *app = [UIApplication sharedApplication];
[app performSelector:#selector(suspend)];
//wait 2 seconds while app is going background
[NSThread sleepForTimeInterval:2.0];
//exit app when app is in background
exit(0);
}];
//[alertController addAction:action3g];
[alertController addAction:actionWifi];
[alertController addAction:actionCancel];
[self presentViewController:alertController animated:YES completion:nil];
}
if (SYSTEM_VERSION_LESS_THAN(NSFoundationVersionNumber_iOS_7_0) ) {
NSLog(#"SQA: iOS 7 or less dialog process");
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:alertTitle
message:alertMessage
delegate:nil
cancelButtonTitle:alertCancelButtonText
otherButtonTitles:alertWifiButtonText, nil];
alertView.tag = TAG_ALERT_NOINTERNET;
[alertView show];
}
}
And this is the source code to check the connection:
- (void)checkInternet:(connection)block
{
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
NSURL *url = [NSURL URLWithString:#"http://www.tempdevserver.com/"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = #"HEAD";
request.cachePolicy = NSURLRequestReloadIgnoringLocalAndRemoteCacheData;
request.timeoutInterval = 10.0;
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:
^(NSURLResponse *response, NSData *data, NSError *connectionError)
{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
block([(NSHTTPURLResponse *)response statusCode] == 200);
}];
}
Now, on iOS 9, dialog is always shown, and never let me pass from there.
What has changed?

Answer 1

Here is the perfect solution, might be helpful to you.
**in your Appdelegate.m File**
//Check Internet Plugin
#include<unistd.h>
#include<netdb.h>
/////
#pragma mark Check Internet connection
-(BOOL)checkInternetConnection {
char *hostname;
struct hostent *hostinfo;
hostname = "google.com";
hostinfo = gethostbyname (hostname);
if (hostinfo == NULL)
{
NSLog(#"-> no connection!\n");
return NO;
}
else{
NSLog(#"-> connection established!\n");
return YES;
}
}
Try above code, it is working fine and perfect.