Unchecking a switch depending on user decision - ios

Question

I'm building an app that asks the user for permission to post notifications when the user enables a switch. I'm using this code:
- (IBAction)mySwitchValueChanged:(id)sender {
if ([UIApplication instancesRespondToSelector:#selector(registerUserNotificationSettings:)]){
[[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]]; // ask the user for permission
}
if ([[UIApplication sharedApplication] respondsToSelector:#selector(currentUserNotificationSettings)]) { // Check it's iOS 8 and above
UIUserNotificationSettings *grantedSettings = [[UIApplication sharedApplication] currentUserNotificationSettings];
if (grantedSettings.types != UIUserNotificationTypeNone)
{
// Accepted
} else
{
[self.mySwitch setOn:NO]; // Declined
}
}
}
The desired behaviour is as follows:
User slides switch
Alert asks for permission
Code waits for user to decide
Either does whatever I code where I've put // accepted, or disables the switch.
The current behaviour makes the code run through at once, and doesn't wait for the user to decide. How can I change this to get the desired behaviour?
Thanks!

Answer 1

Note: This is workaround idea
Once you call this method :- [UIApplication sharedApplication] registerUserNotificationSettings and user grants push notification for the app, then didRegisterForRemoteNotificationsWithDeviceToken in AppDelegate get fired,
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
//call a notification when user granted Push Notifiaction
[[NSNotificationCenter defaultCenter]
postNotificationName:#"PushNotificationSuccess"
object:self];
}
So what you have to do, you can call a NSNotification from the mentioned method, to update the UI accordingly.
- (void)updateUIOnNotification:(NSNotification *) notification
{
// Accepted
}

Answer 2

//Call the below method in your else part and remove the line
//[self.mySwitch setOn:NO];
-(void)Showalert{
UIAlertview*Temp=[[UIAlertview alloc]initWithTitle:#"Need Permission to Send Notifications" message:#"The App Wants The Permission to Work Properly!\nPermit The App in Notification settings"delegate:self cancelButtonTitle:#"Okay!" otherButtonTitles:nil];
[Temp show];
}
#pragma mark Alertview delegate method
- (void)alertViewCancel:(UIAlertView *)alertView{
//Remove the Below line From Else part of your code
[self.mySwitch setOn:NO];
}