I'm uisng this code to display a movie:
MPMoviePlayerViewController *mp = [[MPMoviePlayerViewController alloc]
initWithContentURL:movieURL];
mp.moviePlayer.movieSourceType = MPMovieSourceTypeUnknown;
[self presentMoviePlayerViewControllerAnimated:mp]; [mp.moviePlayer play];
The code is working fine. However when the application goes to the background while playing a movie, when the app comes back in the foreground the movieplayer is not displayed. (I see the view of the controller that called presentMoviePlayerViewControllerAnimated:mp
Is it possible when entering the foregound to resume the movie that was playing before the app went to the background?
Have you set the UIBackgroundmode to audio and also there has been problem with playing the video after app enters foreground .Refer this Tutorial on MPMoviePlayerViewController Also you can try using MPMoviePlayerViewController which has options for implementing various notifications .
you can implement notification techniques to handle it. Add a notification in the class where movie player is playing and associate with it a selector. When app goes to background then in the delegate method
- (void)applicationDidEnterBackground:(UIApplication *)application
{
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
UIApplication *app = [UIApplication sharedApplication];
UIBackgroundTaskIdentifier bgTask = 0;
bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
[app endBackgroundTask:bgTask];
}];
}
write this code.Actually when app goes background it pauses the MPMoviePlayerController so when it is coming to foreground you post the notification which call the method in class where movie controller is implemented and play it again in this method.
-(void)playIntroAnimationAgain
{
[[NSNotificationCenter defaultCenter]removeObserver:self name:NOTIFICATION_PlayAgain_Player object:nil];
[self.moviePlayerController play];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(playIntroAnimationAgain)name:NOTIFICATION_PlayAgain_Player object:nil];
}
It solved my problem.
Related
I created a MPMoviePlayerViewController which plays a live video. However, if I play the video twice meaning opening the player, clicking done, and playing the stream again. The result is only a black screen with no controls of the MPMoviePlayerViewController. And I need to stop the simulator cause I think the application is crashing. Here's how I did it
- (void) playUrl:(NSURL *)movieInfo
{
NSURL *streamUrl = movieInfo;
MPMoviePlayerViewController *mpvc = [[MPMoviePlayerViewController alloc] initWithContentURL:streamUrl];
[[mpvc view] setFrame:self.view.bounds];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(movieFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
mpvc.moviePlayer.movieSourceType = MPMovieSourceTypeStreaming;
[mpvc.moviePlayer setControlStyle:MPMovieControlStyleFullscreen];
[mpvc.moviePlayer setShouldAutoplay:YES];
[mpvc.moviePlayer setFullscreen:NO animated:YES];
[mpvc setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[mpvc.moviePlayer setScalingMode:MPMovieScalingModeNone];
[mpvc.moviePlayer setUseApplicationAudioSession:NO];
[self presentMoviePlayerViewControllerAnimated:mpvc];
}
- (void) movieFinishedCallback:(NSNotification*) aNotification
{
MPMoviePlayerController *player = [aNotification object];
[player stop];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:player];
[player.view removeFromSuperview];
NSLog(#"stopped?");
}
I see that in your movieFinishedCallback: implementation, you remove the MPMoviePlayerController view, but in your playUrl: implementation, you are only setting the view's frame, presumably after you have already added the view in viewDidLoad.
One obvious change which is worth trying, is update you code to use the AVPictureInPictureController or AVPlayerViewController class from the AVKit framework, or the WKWebView class from WebKit. According to the MPMoviePlayerViewController docs, it is deprecated as of iOS 9:
The MPMoviePlayerViewController class is formally deprecated in iOS 9. (The MPMoviePlayerController class is also formally deprecated.) To play video content in iOS 9 and later, instead use the AVPictureInPictureController or AVPlayerViewController class from the AVKit framework, or the WKWebView class from WebKit.
Try moving the line where you add the view to the hierarchy, to the playUrl: method. Generally, it is good practice to have countering implementations in opposing methods for your event counterparts. For instance, implement a method to build and add a view when an event starts, and have a corresponding method where you tear down and remove the same view when the same event ends. But, I say 'generally' because there are always exceptions, and you may have very compelling reasons for not doing so. So, in this case, the opposing calls are presentMoviePlayerViewControllerAnimated: and dismissMoviePlayerViewControllerAnimated:, available from the UIViewController category.
After changing the view access to using dot-notation, to be consistent with your callback implementation, here is what your new playUrl: implemntation would look like, assuming you're adding the view to self.view:
- (void) playUrl:(NSURL *)movieInfo
{
NSURL *streamUrl = movieInfo;
MPMoviePlayerViewController *mpvc = [[MPMoviePlayerViewController alloc] initWithContentURL:streamUrl];
[mpvc.view setFrame:self.view.bounds];
[self.view addSubview:mpvc.view];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(movieFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
mpvc.moviePlayer.movieSourceType = MPMovieSourceTypeStreaming;
[mpvc.moviePlayer setControlStyle:MPMovieControlStyleFullscreen];
[mpvc.moviePlayer setShouldAutoplay:YES];
[mpvc.moviePlayer setFullscreen:NO animated:YES];
[mpvc setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[mpvc.moviePlayer setScalingMode:MPMovieScalingModeNone];
[mpvc.moviePlayer setUseApplicationAudioSession:NO];
[self presentMoviePlayerViewControllerAnimated:mpvc];
}
Another option is to simply not remove the player's view in your callback method. If that is not the culprit, then the next thing I would investigate is check if you are sending messages to nil objects. Also, see what happens when you take out all the implementation from movieFinishedCallback:, except for getting and stopping the player.
I hope that helps!
Fixed the issue by removing the [player.view removeFromSuperview] line
My NSUserNotification is being delivered, playing the given sound, but doesn't show visually on the screen if my app is not the top-most application.
If my application is in the background, the notification does not show. If my application is active, it shows. In both cases the sound plays.
Here is how I'm sending the notification:
NSUserNotification *notification = [[NSUserNotification alloc] init];
[notification setTitle: #"hi"];
[notification setSoundName: NSUserNotificationDefaultSoundName];
[notification setDeliveryDate: [NSDate dateWithTimeIntervalSinceNow: 3]];
[[NSUserNotificationCenter defaultUserNotificationCenter] scheduleNotification: notification];
And I am overriding shouldPresentNotification to always present it.
[NSUserNotificationCenter defaultUserNotificationCenter].delegate = self;
...
- (BOOL)userNotificationCenter:(NSUserNotificationCenter *)center shouldPresentNotification:(NSUserNotification *)notification {
return YES;
}
OSX 10.10.1 Yosemite
How do I make this notification always display, just like it always plays the sound?
I found two ways to make a notification always display:
Remove all previous notifications with
[[NSUserNotificationCenter defaultUserNotificationCenter] removeAllDeliveredNotifications];
Or by changing the identifier
notification.identifier = #"com.yourcompany.yourapp.notificationidentifier";
My app needs to do some internet related operation then pop that view when I send the application to background. And then the root view controller fetches some data and updates the collection view. Do you have any idea how can I solve following issues related to above operations(by the way, I use local notifications to start the process):
1) UI related operations(popping current view controller) seems to fail in the background.
2) When I pop my view to root view controller, Root view has some nsurlconnection which sends data to its delegate. Since long running tasks run in global queue, nsurlconnection seems to fail sending any information to its delegate.
I use the following code for this process:
UIBackgroundTaskIdentifier __block bgTask;
UIApplication *app = [UIApplication sharedApplication];
bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
[app endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self performOperation];
NSLog(#"Operation finished");
});
As matt pointed out, you can't do UI operations like popping the view controller when the app is in the background. When the app comes back to the foreground (e.g. the user taps on the icon again), the pop may take place then (if the app wasn't completely terminated in the interim).
I assume matt's observation answered your second question. If it didn't, please clarify what you mean. But this use of UIBackgroundTaskIdentifier doesn't care whether you used global queues or custom queues or whatever. The only restriction is that some UI operations will not take place, so anything contingent upon, for example, viewDidAppear, won't take place.
As an aside, I wanted to point out that you really want to call endBackgroundTask when the code that is doing the task completes, which your code sample does not appear to do. See the Executing a Finite-Length Task in the Background of the App States and Multitasking chapter of the iOS App Programming Guide.
Thus, you might do something like:
UIApplication *app = [UIApplication sharedApplication];
UIBackgroundTaskIdentifier __block bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
NSLog(#"Operation did not finish!!!");
[app endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self performOperation];
NSLog(#"Operation finished");
if (bgTask != UIBackgroundTaskInvalid) {
[app endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}
});
I have an UIActivityIndicator that starts animating on the top of all of my views. Right after he starts animating, the parent view of this current view is popped. Now, after he's animating, I'm calling another class with a block and runs some server commands.
My problem is, that in the other class im getting the response from the server, but I cannot tell the
UIActivityIndicator to stop, because he is in the other class. (I have to say that I don't want to implement nothing on the Application Delegate).
On the server class, after I get the response, a UIAlertView appears, but the UIAlertView is implemented inside the server class. That's where I want the UIActivityIndicator to stop.
I Hope that I understand it well, if not, please tell me.
Thank you.
- (void)buttonPressed:(id)sender
{
UIView * darkView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
darkView.backgroundColor = [UIColor blackColor];
darkView.alpha = 0.5f;
UIActivityIndicatorView * activityIndicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[darkView addSubview:activityIndicator];
activityIndicator.center = darkView.center;
[activityIndicator startAnimating];
[[UIApplication sharedApplication].keyWindow addSubview:darkView];
// Inside this class (ShareByEmail) there is a UIAlertView that should stop the
// animation that already running right now.
ShareByEmail *sbe = [[ShareByEmail alloc]init];
[sbe share];
[self.navigationController popViewControllerAnimated:YES];
}
One option is to keep the UIActivityIndicator as singleton object and use it from anywhere in the project. Another option is to try this with notifications. You need to add and remove observer to this activity indicator and whenever a request is fired/executed, you need to post a notification to start/stop activity indicator.
Update:
In your case either you can set it as [[NSNotificationCenter defaultCenter] addObserver:activityIndicator selector:#selector(startAnimating) name:#"startActivityIndicator" object:nil] and [[NSNotificationCenter defaultCenter] addObserver:activityIndicator selector:#selector(stopAnimating) name:#"stopActivityIndicator" object:nil] immediately after allocating memory for the activity indicator. Now whenever you want to start or stop it, call [[NSNotificationCenter defaultCenter] postNotificationName:#"startActivityIndicator" object:nil] or [[NSNotificationCenter defaultCenter] postNotificationName:#"stopActivityIndicator" object:nil]. Make sure that the activity indicator is not released. I would suggest you to declare your activity indicator as a class level variable in this class and allocate memory in init method or so. In your button pressed method, you can just use [darkView addSubview:activityIndicator];
I trying to show video on my App. The App hides the iPhone top panel. The player seems to work fine. There is just one annoying problem: when the player shows the video, it sometimes show the top panel and sometime hides it. When it is hidden, the video player panel is pushed a little (the same size of the panel that used to be there). Is is Apple bug? Am I doing something wrong?
Here is my code:
- (void) showFullscreenMediaWithURL: (NSURL *) mediaURL
{
MPMoviePlayerViewController *ctrl = [[MPMoviePlayerViewController alloc] initWithContentURL: mediaURL];
[[NSNotificationCenter defaultCenter] addObserver:self selector: #selector(playbackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:ctrl.moviePlayer];
ctrl.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
ctrl.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[ctrl setWantsFullScreenLayout:YES];
[self presentMoviePlayerViewControllerAnimated:ctrl];
[ctrl release];
}
-(void) playbackDidFinish:(NSNotification*)aNotification
{
NSLog(#"Finished playback");
MPMoviePlayerController *player = [aNotification object];
[[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification
object:player];
[player stop];
[self dismissMoviePlayerViewControllerAnimated];
[[captureManager session] startRunning];
}
if by iPhone top panel you mean the iPhone Status bar, then the solution should be simple.
Just before present/dismissMoviePlayerViewControllerAnimated add the following:
// Hide Status Bar
[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationNone];
// Show Status Bar
[[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationNone];
Update: I can see what seems to be your problem.
First, the upper bar with the network indication icons and other information is the status bar (and nothing else). Your problem seems to be more ViewController related then a MediaPlayer. In other words, If you would have try to "push" some other ViewController to full screen (as the player is) you would have experience the exact same issue.
Second, the proper way, or I might say: my preferred way, of loading a view controller to full screen is the following:
Setup a full screen rootViewController which will be loaded on applicationDidFinishLaunchingWithOptions on your appDelegate.
On the rootViewController init put your default viewController (the one you used to load from appDelegate). Make sure that the rootViewController.view's frame is filling the screen.
Create 2 messages on rootViewController: LoadFullscreen:viewController and dismissFullscreen using present/dismissModelViewController. the setStatusBarHidden messages should be called from here.
To Lunch the player on full screen, create the player viewController and perform [rootViewController LoadFullscreen:player];
There are some other ways, but generally, this is the best practice and the method I recommend. It's relatively "a lot of code" to implement, thats why I couldn't help you with code snippers, but the general idea is relatively simple.
I hope that's help, E.G :)