Hello. I am attempting to display the music inside of my app in Now Playing. I've tried a few different methods and keep running into unknown issues. I'm new to Objective-C and Apple development so I'm at a loss of how to continue.
Currently, I have an external call to viewDidLoad upon initialization. Then, when I'm ready to play the music, I call playMusic. I have it hardcoded to play an mp3 called "1". I believe I have all the signing set up as the music plays after I exit the app. However, there is nothing in Now Playing. There are no errors or issues that I can see while the app is running. This is the only file I have in Xcode relating to this feature.
Please let me know where I'm going wrong or if there is another object I need to use!
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import <MediaPlayer/MediaPlayer.h>
#import <AVFoundation/AVFoundation.h>
@interface ViewController : UIViewController <AVAudioPlayerDelegate>
@property (nonatomic, strong) AVPlayer *player;
@property (nonatomic, strong) MPRemoteCommandCenter *commandCenter;
@property (nonatomic, strong) MPMusicPlayerController *controller;
@property (nonatomic, strong) MPNowPlayingSession *nowPlayingSession;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(@"viewDidLoad started.");
[self setupAudioSession];
[self initializePlayer];
[self createNowPlayingSession];
[self configureNowPlayingInfo];
NSLog(@"viewDidLoad completed.");
}
- (void)setupAudioSession {
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *setCategoryError = nil;
if (![audioSession setCategory:AVAudioSessionCategoryPlayback error:&setCategoryError]) {
NSLog(@"Error setting category: %@", [setCategoryError localizedDescription]);
} else {
NSLog(@"Audio session category set.");
}
NSError *activationError = nil;
if (![audioSession setActive:YES error:&activationError]) {
NSLog(@"Error activating audio session: %@", [activationError localizedDescription]);
} else {
NSLog(@"Audio session activated.");
}
}
- (void)initializePlayer {
NSString *soundFilePath = [NSString stringWithFormat:@"%@/base/game/%@",[[NSBundle mainBundle] resourcePath], @"bgm/1.mp3"];
if (!soundFilePath) {
NSLog(@"Audio file not found.");
return;
}
NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
self.player = [AVPlayer playerWithURL:soundFileURL];
NSLog(@"Player initialized with URL: %@", soundFileURL);
}
- (void)createNowPlayingSession {
self.nowPlayingSession = [[MPNowPlayingSession alloc] initWithPlayers:@[self.player]];
NSLog(@"Now Playing Session created with players: %@", self.nowPlayingSession.players);
}
- (void)configureNowPlayingInfo {
MPNowPlayingInfoCenter *infoCenter = [MPNowPlayingInfoCenter defaultCenter];
CMTime duration = self.player.currentItem.duration;
Float64 durationSeconds = CMTimeGetSeconds(duration);
CMTime currentTime = self.player.currentTime;
Float64 currentTimeSeconds = CMTimeGetSeconds(currentTime);
NSDictionary *nowPlayingInfo = @{
MPMediaItemPropertyTitle: @"Example Title",
MPMediaItemPropertyArtist: @"Example Artist",
MPMediaItemPropertyPlaybackDuration: @(durationSeconds),
MPNowPlayingInfoPropertyElapsedPlaybackTime: @(currentTimeSeconds),
MPNowPlayingInfoPropertyPlaybackRate: @(self.player.rate)
};
infoCenter.nowPlayingInfo = nowPlayingInfo;
NSLog(@"Now Playing info configured: %@", nowPlayingInfo);
}
- (void)playMusic {
[self.player play];
[self createNowPlayingSession];
[self configureNowPlayingInfo];
}
- (void)pauseMusic {
[self.player pause];
[self configureNowPlayingInfo];
}
@end