I have implemented following in my applicationDidEnterBackground.
It will work for three minutes in background and after three minutes beginBackgroundTaskWithExpirationHandler will run, How can i make it work for longer?
- (void)applicationDidEnterBackground:(UIApplication *)application
{
bgTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
NSLog(#"ending background task");
[[UIApplication sharedApplication] endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
NSTimer *timerlocation = [NSTimer scheduledTimerWithTimeInterval:30.0
target:locationManager
selector:#selector(startUpdatingLocation)
userInfo:nil
repeats:YES];
}
Make sure to use the background mode for "receiving location updates." Then if you call startUpdatingLocation while the app is in the foreground, it will continue to check the location in the background.
Related
I call a method from background thread as follows.
- (void)applicationDidEnterBackground:(UIApplication *)application
{
UIApplication *app = [UIApplication sharedApplication];
//create new uiBackgroundTask
__block UIBackgroundTaskIdentifier bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
[app endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
//and create new timer with async call:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
//run function methodRunAfterBackground
NSTimer* t = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(methodRunAfterBackground) userInfo:nil repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:t forMode:NSDefaultRunLoopMode];
[[NSRunLoop currentRunLoop] run];
});
}
After 15 seconds, I have to make a call to a number. I use [[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:#"tel://%#",_number]]];but unable to make a call while application is in background state. Can we make a call from background state? If yes, how?
I want to fetch service for every 15 mins,so i am using NSTimer.It is working fine.But how to call same service while app is in background state by using nstimer.Nstimer is not working in background state.Please suggest me.
//when the application is about to move from active to inactive state.
- (void)applicationWillResignActive:(UIApplication *)application
{
[self sendBackgroundLocationToServer];
}
- (void) sendBackgroundLocationToServer
{
UIBackgroundTaskIdentifier bgTask = UIBackgroundTaskInvalid;
bgTask = [[UIApplication sharedApplication]
beginBackgroundTaskWithExpirationHandler:^{
[[UIApplication sharedApplication] endBackgroundTask:bgTask];
}];
//Start Timer
[self startTimer];
//Close the task
if (bgTask != UIBackgroundTaskInvalid)
{
[[UIApplication sharedApplication] endBackgroundTask:bgTask];
}
}
-(void) closeUpShopBeforeBackgrounding {
// this listen to the UIApplicationDidEnterBackgroundNotification
[self beginBackgroundUpdateTask];
// do some closing stuff
[self endBackgroundUpdateTask]; }
- (void) beginBackgroundUpdateTask {
self.backgroundTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
[self endBackgroundUpdateTask];
}]; }
- (void) endBackgroundUpdateTask {
[[UIApplication sharedApplication] endBackgroundTask: self.backgroundTask];
self.backgroundTask = UIBackgroundTaskInvalid; }
This code is working fine for me, but when I foreground the app again, its dead in the water. Its as if the viewDidLoads are not firing, and nothing is happening.
Is there anything I need to do when the app foregrounds to kick it back into life?
Hello everyone I need to call a method when the app is in background. This is now i am trying to achieve this but the timer is never called.
- (void)applicationDidEnterBackground:(UIApplication *)application
{
UIApplication* app = [UIApplication sharedApplication];
bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
[app endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
// Start the long-running task and return immediately.
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// Do the work associated with the task.
self.timer = nil;
[self initTimer];
});
}
- (void)initTimer {
DebugLog(#"timer INIT!!!!!");
if (self.timer == nil) {
self.timer = [NSTimer scheduledTimerWithTimeInterval:0.3
target:self
selector:#selector(checkUpdates:)
userInfo:nil
repeats:YES];
}
}
- (void)checkUpdates:(NSTimer *)timer{
[UIApplication sharedApplication].applicationIconBadgeNumber++;
DebugLog(#"timer FIRED!!!!!");
[self initTimer];
}
I need to call the method checkUpdates every Nth minute or seconds while the app is in background.Please note that initTimer is called when the app enters background but the timer is never called.
Apple will not allow the use the application in background if you want to use the application in background you have to use the 'UIBackgroundModes'.
and after that from Appdeligate you can manage this thread
you should check
http://developer.apple.com/library/ios/#documentation/General/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html
hope this will help you
I'm making an iphone app(Live radio app).
My app is supported background mode.
But, if the phone rings when radio app is playing in background mode, my app stop with errors .
MP AVAudioSessionDelegateMediaPlayerOnly end interruption. Interruptor <Phone> category <completed> resumable <0>, _state = 6
MP endInterruptionFromInterruptor :: resuming playback
So, I modified my code, but useless.
I'll add my code. Please tell me my faults. Thanks.
AppDelegate.h
#interface AppDelegate : UIResponder <UIApplicationDelegate, AVAudioSessionDelegate>
#property (assign, nonatomic) UIBackgroundTaskIdentifier bgTask;
... ...
#end
AppDelegate.m
- (void)applicationDidEnterBackground:(UIApplication *)application
{
bgTask = [application beginBackgroundTaskWithExpirationHandler:^{
// Clean up any unfinished task business by marking where you.
// stopped or ending the task outright.
[application endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
// Start the long-running task and return immediately.
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// Do the work associated with the task, preferably in chunks.
[application endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
});
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
bgTask = [application beginBackgroundTaskWithExpirationHandler:^{
[application endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
}
viewController.m
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
moviePlayer = [[MPMoviePlayerController alloc] init];
[moviePlayer setContentURL:... m3u8];
[moviePlayer play];
you need to add this:
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];