I have asked this question before few days but nobody answer me and I could not find the solution.
So I want to ask the same question again and please answer me if you know the answer.
I want to assign these buttons in the picture to my avplayer play/pause button.
Note: My application icons appear in the now playing bar instead of Music icon, my application works fine in background .
Any help please.
To allow delivery of remote-control events, you must call the beginReceivingRemoteControlEvents method of UIApplication.
You then respond to the remote control events by implementing the remoteControlReceivedWithEvent: method like this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
...
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[[UIApplication sharedApplication] becomeFirstResponder];
return YES;
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)event
{
switch (event.subtype)
{
case UIEventSubtypeRemoteControlPlay:
// play code
...
break;
case UIEventSubtypeRemoteControlTogglePlayPause:
// toggle code
...
break;
case UIEventSubtypeRemoteControlNextTrack:
// next code
...
break;
default:
break;
}
}
Note:
"In iOS 7.1 and later, use the shared MPRemoteCommandCenter object to register for remote control events. You do not need to call this method (note: beginReceivingRemoteControlEvents) when using the shared command center object."
(Source)
Related
I have an iOS application that streams music using RadioKit SDK. The audio plays fine while switching between different views of a tab bar controller, however when a headset is plugged in and the user is viewing one of the secondary tab views (there are 5 total, 1 primary for when the app launches, and 4 others) if they try to hit the play/pause button the app does not recognize the action. If it's playing, it won't pause, if it's paused, it won't play. The app does, however, recognize volume changes from the headset.
This behavior is consistent whether the app is in view or if in background or if the device is locked.
I've done some heavy searching and can't seem to figure this out. Help is appreciated, thank you!
iOS version 6.1.3
iOS SDK version 6.1
xCode version 4.6.3
You want to listen to -(void)remoteControlReceivedWithEvent:(UIEvent *)event
Make a base UIViewController, let's call it BaseViewController and add the following :
-(void)remoteControlReceivedWithEvent:(UIEvent *)event {
if (event.type == UIEventTypeRemoteControl) {
switch(event.subtype) {
case UIEventSubtypeRemoteControlTogglePlayPause:
break;
case UIEventSubtypeRemoteControlPlay:
break;
case UIEventSubtypeRemoteControlPause:
break;
case UIEventSubtypeRemoteControlStop:
break;
default:
break;
}
}
else{
[super remoteControlReceivedWithEvent:event];
}
}
Also you want to include the following, in the base class, so that you can actually receive any remote control events.
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
UIApplication *application = [UIApplication sharedApplication];
if ([application respondsToSelector:#selector(beginReceivingRemoteControlEvents)]) {
[application beginReceivingRemoteControlEvents];
}
[self becomeFirstResponder];
}
And finally have all the UIViewControllers be subclass of the BaseViewController.
I am using Avplayer to show video clips and when i go back (app in background) video stop. How can i keep playing the video?
I have search about background task & background thread ,IOS only support music in background (Not video)
http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html
here is some discussion about play video in background
1) https://discussions.apple.com/thread/2799090?start=0&tstart=0
2) http://www.cocoawithlove.com/2011/04/background-audio-through-ios-movie.html
But there are many apps in AppStore, that play video in Background like
Swift Player : https://itunes.apple.com/us/app/swift-player-speed-up-video/id545216639?mt=8&ign-mpt=uo%3D2
SpeedUpTV : https://itunes.apple.com/ua/app/speeduptv/id386986953?mt=8
This method supports all the possibilities:
Screen locked by the user;
List item
Home button pressed;
As long as you have an instance of AVPlayer running iOS prevents auto lock of the device.
First you need to configure the application to support audio background from the Info.plist file adding in the UIBackgroundModes array the audio element.
Then put in your AppDelegate.m into
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions:
these methods
[[AVAudioSession sharedInstance] setDelegate: self];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
and #import < AVFoundation/AVFoundation.h >
Then in your view controller that controls AVPlayer
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
and
- (void)viewWillDisappear:(BOOL)animated
{
[mPlayer pause];
[super viewWillDisappear:animated];
[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
[self resignFirstResponder];
}
then respond to the
- (void)remoteControlReceivedWithEvent:(UIEvent *)event {
switch (event.subtype) {
case UIEventSubtypeRemoteControlTogglePlayPause:
if([mPlayer rate] == 0){
[mPlayer play];
} else {
[mPlayer pause];
}
break;
case UIEventSubtypeRemoteControlPlay:
[mPlayer play];
break;
case UIEventSubtypeRemoteControlPause:
[mPlayer pause];
break;
default:
break;
}
}
Another trick is needed to resume the reproduction if the user presses the home button (in which case the reproduction is suspended with a fade out).
When you control the reproduction of the video (I have play methods) set
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(applicationDidEnterBackground:) name:UIApplicationDidEnterBackgroundNotification object:nil];
and the corresponding method to be invoked that will launch a timer and resume the reproduction.
- (void)applicationDidEnterBackground:(NSNotification *)notification
{
[mPlayer performSelector:#selector(play) withObject:nil afterDelay:0.01];
}
Its works for me to play video in Backgorund.
Thanks to all.
If you try to change the background mode:
Sorry, App store wont approve it.MPMoviePlayerViewController playback video after going to background for youtube
In my research, someone would take the sound track out to play in te background when it goes into background as the video would be pause and get the playbacktime for resume playing when go into foreground
It is not possible to play background music/video using Avplayer. But it is possible using
MPMoviePlayerViewController. I have done this in one of my app using this player & this app
is run successfully to appstore.
Try with this snippet, I've already integrated this with my app & it's being useful for me..hope this will work for you!!
Follow the steps given below:
Add UIBackgroundModes in the APPNAME-Info.plist, with the selection
App plays audio
Then add the AudioToolBox framework to the folder frameworks.
In the APPNAMEAppDelegate.h add:
-- #import < AVFoundation/AVFoundation.h>
-- #import < AudioToolbox/AudioToolbox.h>
In the APPNAMEAppDelegate.m add the following:
// Set AudioSession
NSError *sessionError = nil;
[[AVAudioSession sharedInstance] setDelegate:self];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];
/* Pick any one of them */
// 1. Overriding the output audio route
//UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
//AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute,
sizeof(audioRouteOverride), &audioRouteOverride);
========================================================================
// 2. Changing the default output audio route
UInt32 doChangeDefaultRoute = 1;
AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryDefaultToSpeaker, sizeof(doChangeDefaultRoute), &doChangeDefaultRoute);
into the
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
but before the two lines:
[self.window addSubview:viewController.view];
[self.window makeKeyAndVisible];
Enjoy Programming!!
Swift version for the accepted answer.
In the delegate:
AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, error: nil)
AVAudioSession.sharedInstance().setActive(true, error: nil)
In the view controller that controls AVPlayer
override func viewDidAppear(animated: Bool) {
UIApplication.sharedApplication().beginReceivingRemoteControlEvents()
self.becomeFirstResponder()
}
override func viewWillDisappear(animated: Bool) {
mPlayer.pause()
UIApplication.sharedApplication().endReceivingRemoteControlEvents()
self.resignFirstResponder()
}
Don't forget to "import AVFoundation"
In addition to fattomhk's response, here's what you can do to achieve video forwarding to the time it should be after your application comes in foreground:
Get currentPlaybackTime of playing video when go to background and store it in lastPlayBackTime
Store the time when application goes to background (in userDefault probably)
Again get the time when application comes in foreground
Calculate the duration between background and foreground time
Set current playback time of video to lastPlayBackTime + duration
If you are Playing video using WebView you can handle using javascript to play video on background.
strVideoHTML = #"<html><head><style>body.........</style></head> <body><div id=\"overlay\"><div id=\"youtubelogo1\"></div></div><div id=\"player\"></div> <script> var tag = document.createElement('script'); tag.src = \"http://www.youtube.com/player_api\"; var firstScriptTag = document.getElementsByTagName('script')[0]; firstScriptTag.parentNode.insertBefore(tag, firstScriptTag); var player; events: { 'onReady': onPlayerReady, } }); } function onPlayerReady(event) { event.target.playVideo(); } function changeBG(url){ document.getElementById('overlay').style.backgroundImage=url;} function manualPlay() { player.playVideo(); } function manualPause() { player.pauseVideo(); } </script></body> </html>";
NSString *html = [NSString stringWithFormat:strVideoHTML,url, width, height,videoid;
webvideoView.delegate = self;
[webvideoView loadHTMLString:html baseURL:[NSURL URLWithString:#"http://www.your-url.com"]];
On view diappear call
strscript = #"manualPlay();
[webvideoView stringByEvaluatingJavaScriptFromString:strscript];
I'd like to add something that for some reason ended up being the culprit for me. I had used AVPlayer and background play for a long time without problems, but this one time I just couldn't get it to work.
I found out that when you go background, the rate property of the AVPlayer sometimes seems to dip to 0.0 (i.e. paused), and for that reason we simply need to KVO check the rate property at all times, or at least when we go to background. If the rate dips below 0.0 and we can assume that the user wants to play (i.e. the user did not deliberately tap pause in remote controls, the movie ended, etc) we need to call .play() on the AVPlayer again.
AFAIK there is no other toggle on the AVPlayer to keep it from pausing itself when app goes to background.
I am creating a local UILocalNotification and displaying it to the user as a banner. Is it possible to set it up so that when the user taps it and returns to the app, the app will receive some kind of data on the specific kind of notification it was? I want to open a specific view controller in the app. I think the best way would be to essentially send a URL to the app, or is there a way to get access to the UILocalNotification so that I can test which kind is was and do the right action?
To get data from the local NSUserNotification that is passed to an iOS app, all that you need to do is implement the following method: - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification.
The problem is, this is called both when a local notification is posted when the app is in the background (i.e. when the user taps on the notification and then returns to the app), and also if the app is in the foreground at the time when the local notification fires (it is on a timer, after all). So how should one figure out if the notification was fired when the app was in the background or foreground? It's pretty simple. Here's my code:
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
UIApplicationState state = [application applicationState];
if (state == UIApplicationStateInactive) {
// Application was in the background when notification was delivered.
} else {
// App was running in the foreground. Perhaps
// show a UIAlertView to ask them what they want to do?
}
}
At this point you can handle the notification based on notification.userInfo, which holds a NSDictionary.
ust implement the NSUserNotificationCenterDelegate and define this method:
- (void)userNotificationCenter:(NSUserNotificationCenter *)center didActivateNotification:(NSUserNotification *)notification
Example:
This is what I did in a "notifier" application.
- (void) userNotificationCenter:(NSUserNotificationCenter *)center didActivateNotification:(NSUserNotification *)notification
{
NSRunAlertPanel([notification title], [notification informativeText], #"Ok", nil, nil);
}
- (void) userNotificationCenter:(NSUserNotificationCenter *)center didDeliverNotification:(NSUserNotification *)notification
{
notifications=nil;
[tableView reloadData];
[center removeDeliveredNotification: notification];
}
When the notification is activated (click by the user) I just inform the user with a panel (I could use a hud window).In this case I immediately remove the delivered notification, but this is not what happens usually.The notification could stay there some time and be removed after 1/2 hours (it depends on the application that you are developing).
1 - Define some class in your project to implement NSUserNoficationCenterDelegate protocol (documented here)
#interface someObject : NSObject <NSUserNotificationCenterDelegate>
{
- (void)userNotificationCenter:(NSUserNotificationCenter *)center didActivateNotification:(NSUserNotification *)notification;
}
2 - Set an instance of the object defined #1 as the delegate of default notification center.
[[NSUserNotificationCenter defaultNotificationCenter] setDelegate: someObject];
Now you will get called on didActivateNotification any time the user taps/clicks on the notification. You will have the original notification you created. So any information that you need should be available to you.
If you want/need special information (other than notification title, message, etc) you will probably need to set additional application specific information in your notification before you schedule it to be sent. For example:
NSUserNotification* notification = [[NSUserNotification alloc] init];
NSDictionary* specialInformation = [NSDictionary dictionaryWithObjectsAndKeys: #"specialValue", #"specialKey", nil];
[notification setUserInfo:specialInformation];
I want to set a switch to off when the app enters into background. I am trying to do it using the following code. It isn't working :( When I resume app the switch is still "on" on animation on the screen. How can I fix this?
- (void)applicationWillResignActive:(UIApplication *)application {
[registrationSwitch setOn:NO animated:YES];
}
You need to set the value in userDefaults. Add a boolean check like:
if (userDefaultBool == 1){
registrationSwitch setOn
}
else{
registration setOff
}
put that in your viewDidLoad
I'm trying to detect user input (a click) on the headphones connected to an iPhone. So far I've only found how to detect interruptions using AVAudioSession. Is AVAudioSession right or is there another way? how?
You want this:
beginReceivingRemoteControlEvents
You implement something this in one of your VCs classes:
// If using a nonmixable audio session category, as this app does, you must activate reception of
// remote-control events to allow reactivation of the audio session when running in the background.
// Also, to receive remote-control events, the app must be eligible to become the first responder.
- (void) viewDidAppear: (BOOL) animated {
[super viewDidAppear: animated];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
- (BOOL) canBecomeFirstResponder {
return YES;
}
// Respond to remote control events
- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {
if (receivedEvent.type == UIEventTypeRemoteControl) {
switch (receivedEvent.subtype) {
case UIEventSubtypeRemoteControlTogglePlayPause:
[self playOrStop: nil];
break;
default:
break;
}
}
}
See the sample code here.
It is even easier now, as of iOS 7. To execute a block when the headphone play/pause button is pressed:
MPRemoteCommandCenter *commandCenter = [MPRemoteCommandCenter sharedCommandCenter];
[commandCenter.togglePlayPauseCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
NSLog(#"toggle button pressed");
return MPRemoteCommandHandlerStatusSuccess;
}];
or, if you prefer to use a method instead of a block:
[commandCenter.togglePlayPauseCommand addTarget:self action:#selector(toggleButtonAction)];
To stop:
[commandCenter.togglePlayPauseCommand removeTarget:self];
or:
[commandCenter.togglePlayPauseCommand removeTarget:self action:#selector(toggleButtonAction)];
You'll need to add this to the includes area of your file:
#import MediaPlayer;