I have a UITableView populated with a bunch of music players that I've made using a custom UITableViewCell. (as shown in the screenshot linked here: screenshot).
The problem with the way I have it coded is that since each cell is completely independent, there's no way for one tableviewcell to check if any other the other cells have audio playing. This means that when I run my app, I am able to play more than one audio file at the same time.
Ultimately, how would I go about putting some sort of check in place so that when the user hits the play button, the app first checks to see if any other cell is playing audio, and, if so, stops them before playing its own audio file?
Please let me know if you would like me to post my project.
Thank you!
For starters I can't think of any good reason the cells themselves should be responsible for playing the audio. They should be responsible for telling some other object (like whatever controller is responsible for the UITableView) to play the audio. That controller would obviously then know to stop whatever it was already playing before playing something else.
In general, it's not a great idea to be putting that much logic into a 'view.'
It would probably be easiest to use notifications (NSNotification and NSNotificationCenter).
Use a common notification name for starting and stopping.
MusicPlayerWillPlay
MusicPlayerWillStop
When you create each player, register for both notifications. Then when playerA is going to play, it posts a MusicPlayerWillPlay notification. playerB, playerC and playerD, will get this notification, and if they are playing, will stop.
One caveat is that each player is unaware of the others, so you have to register with a nil object, which means playerA will get it's own notification. So in your notification method, you'll probably want to do something like
{
//...
if (sender == self)
return;
//...
}
Related
I'm using SPTAudioStreamingController.sharedInstance().metadata.currentTrack?.uri to get the currently playing track, but sometimes it returns the next song on the playlist, instead of what is playing right now.
Edit: I think it may have to do with the playlist it is playing from, since whenever I skip a track, it deletes from the playlist. Is there a way to play from the top song in the playlist every time a skip occurs?
Or even better: Is there a way to refresh a playlist?
You can use a delegate method and locally keep track of what track is playing:
func audioStreaming(_ audioStreaming: SPTAudioStreamingController!, didStartPlayingTrack trackUri: String!) {
self.currentURI = trackURI
}
Whenever a track starts playing, the delegate method will fire and you can locally store the current URI. Just make sure to also utilize the other delegate methods like didStopPlayingTrack in order to ensure you have all the correct information.
Anyone know how to code and have a fake call pop up in an Application, so I can use my own audio? I know several apps have done this, just don't know where to start.
Create a UIView that look likes the interface when someone is calling you.
Prepare an audio file playback using AVAudioPlayer
When the apps runs, show that interface, and playback the audio file.
You can include stuff like timer settings and notification so that it will fires off 5 minutes later or something.
I want to add a "subtitles" to a video played in an iPhone app. I don't want those subtitles encoded into the video itself - ideally I'd love to have a view showing the video (with pause, play, volume and such standard controls) together with a view displaying the text that changes together with movie time changing.
If I drawn that, it's something like this,
So, basicly, I would need a way to get a method called when movie is playing, and then synchronize the text displayed on the label with the movie timing.
Anyone used a solution that was able to do it?
I've recently done something that syncs graphics to times in an audio track. The way I did it was by using the currentPlaybackTime property of the MPMediaPlayback interface (which the MoviePlayer controller should also conform to). This returns the seconds elapsed in the media, in a double (typedef'ed as NSTimeInterval). The actual synchronisation in my app was not done in notifications, as I couldn't find any resembling a "tick", but instead I created a timer, calling a function queried the currentPlaybackTime, and updated the graphics based on this.
In terms of your implementation, I would assume you have some kind of system for associating label text (subtitles) with a particular time. You could then compare the text's time range with the time returned from currentPlaybackTime to find the correct text to display.
I want a functionality in which i want to detect if my device is being shaked.The problem is i can detect the shake with didAccelerate method of UIAcceleratorDelegate , but i dont know how to detect if the device is still shaking. I want to play an audio file when the user shakes the device for first time,i have to check if the user is still shaking the device while playing the 1st audio file,if it is still being shaked, then i have to play another file.
See the sample project GLPaint from Apple which was found by visiting http://developer.apple.com/iphone and entering "shake" in the search box. Developer account not required.
You might consider writing a Method that runs in a separate thread that polls wether your device is being shaken every now and then and fire events that you handle somewhere else in your code (or instead of that, handle whatever you want to handle within the threads context itself, even tough i would not recommend doing that).
You just have to make sure, that your "shake-detektor"-thread exits at some point in time, you probably want to do that when the second audio file stopped playing. So your loop could test on that condition.
Hope I could help a bit.
If I use MPMoviePlayerController to play video in my iPhone app, it opens, loads the movie, plays it and then closes. Is it possible to force it to stay open after the movie finishes, so that user can replay it using its controls, instead of using controls in parent view? Also, is it possible to start MPMoviePlayerController in the paused mode?
thanks for any advice.
None of that is possible using the available API in the Pre-3.2 OS. One thing you could do is take a scerenshot of the last frame and stick that behind the movie so when it's done playing, it looks like it's still there, then just stick a button on it to replay. you could make an interface that looks/behaves similar to the standard movie player interface just for the play button if you need to.
For anyone stumbling over this now... There is a way to do this. Check out this question :)