2人のオーディオプレーヤーが2つの異なる曲を同時に再生するにはどうすればよいですか？

Question

さて、私はできるだけこのように説明しようとします。私のアプリには2つのオーディオプレーヤーがあり、私は自分の音楽ライブラリから各プレイヤーの曲を再生できるようにしたいと考えています。私が最初の曲を選んで作品を選んだとき、別の曲を選んだときに最初の曲がオフになり、両方のオーディオプレイヤーだけが選んだ曲を再生できるという問題があります。オーディオプレーヤーに2種類の曲を再生させるにはどうすればよいですか？ここに私が現在持っているコードは：

//EDITED CODE: 
class GameScene: SKScene, MPMediaPickerControllerDelegate, AVAudioPlayerDelegate { 

var mediaPicker: MPMediaPickerController? 
var mediaPicker2: MPMediaPickerController? 

var music2 = MPMediaItem() 
var music = MPMediaItem() 

var musicPlayer2 = AVAudioPlayer() 
var musicPlayer = AVAudioPlayer() 


func mediaPicker(mediaPicker: MPMediaPickerController, didPickMediaItems mediaItemCollection: MPMediaItemCollection) { 
mediaPicker.dismissViewControllerAnimated(true, completion: nil) 

let aMediaItem = mediaItemCollection.items[0] as MPMediaItem 
music = aMediaItem 
NSLog("\(aMediaItem.title)selected") 


let url: NSURL = (music.valueForProperty(MPMediaItemPropertyAssetURL) as? NSURL)! 

    do { 
     musicPlayer = try AVAudioPlayer(contentsOfURL: url) 

    } catch { 
     return 
    } 
     musicPlayer.pause() 
     leftPlayButton.hidden = false 




if mediaItemCollection.items.count > 1 { 
    let aMediaItem2 = mediaItemCollection.items[1] as MPMediaItem 
    music2 = aMediaItem2 

    let url2: NSURL = (music2.valueForProperty(MPMediaItemPropertyAssetURL) as? NSURL)! 

    do { 
     musicPlayer2 = try AVAudioPlayer(contentsOfURL: url2) 

    } catch { 
     return 
    } 
    musicPlayer2.pause() 
    rightPlayButton.hidden = false 

} 
} 
      if node.name == "addmusictoleft" { 
      mediaPicker = MPMediaPickerController(mediaTypes: .Music) 

      if let picker2 = mediaPicker{ 


       print("Successfully open media picker Left") 
       picker2.delegate = self 
       picker2.allowsPickingMultipleItems = true 
       picker2.showsCloudItems = false 
       picker2.prompt = "Pick a song for left player" 
       self.view?.window?.rootViewController!.presentViewController(picker2, animated: true, completion: nil) 

      } else { 
       print("PICKER WONT OPEN") 
      } 
     } 


      if node.name == "addmusictoright" { 
      mediaPicker2 = MPMediaPickerController(mediaTypes: .Music) 
      if let picker = mediaPicker2{ 


       print("Successfully open media picker Right") 
       picker.delegate = self 
       picker.allowsPickingMultipleItems = false 
       picker.showsCloudItems = false 
       picker.prompt = "Pick a song for right player" 
       self.view?.window?.rootViewController!.presentViewController(picker, animated: true, completion: nil) 

      } else { 
       print("PICKER WONT OPEN") 
      } 



     } 

Answer 1

私はデモプロジェクトを作って、それは私のiPadでうまく動作します。 ここに私のコードです。

ViewController.h

#import <UIKit/UIKit.h> 
#import <MediaPlayer/MediaPlayer.h> 
#import <AVFoundation/AVFoundation.h> 

@interface ViewController : UIViewController<MPMediaPickerControllerDelegate,AVAudioPlayerDelegate> 


@end 

ViewController.m

#import "ViewController.h" 


@interface ViewController(){ 

int counter; 

} 

@property AVAudioPlayer *avAudioPlayer; 
@property AVAudioPlayer *avAudioPlayer2; 

@end 

@implementation ViewController 

- (void)viewDidLoad { 

[super viewDidLoad]; 


counter = 0; 
self.avAudioPlayer.delegate = self; 
self.avAudioPlayer2.delegate = self; 

UIButton *button1 = [[UIButton alloc]initWithFrame:CGRectMake(120, 50, 80, 30)]; 
[button1 addTarget:self action:@selector(button1Click:) forControlEvents:UIControlEventTouchUpInside]; 
button1.backgroundColor = [UIColor yellowColor]; 
[button1 setTitle:@"play" forState:UIControlStateNormal]; 
[self.view addSubview:button1]; 


UIButton *button2 = [[UIButton alloc]initWithFrame:CGRectMake(120, 120, 80, 30)]; 
[button2 addTarget:self action:@selector(button2Click:) forControlEvents:UIControlEventTouchUpInside]; 
button2.backgroundColor = [UIColor yellowColor]; 
[button2 setTitle:@"Stop" forState:UIControlStateNormal]; 
[self.view addSubview:button2]; 

// Do any additional setup after loading the view, typically from a nib. 
} 

- (void)didReceiveMemoryWarning { 
[super didReceiveMemoryWarning]; 
// Dispose of any resources that can be recreated. 
} 

-(void)button2Click : (id)sender { 

if (counter == 0) { 

    [self.avAudioPlayer stop]; 
} 
if (counter == 1) { 

    [self.avAudioPlayer2 stop]; 
} 


counter ++; 

} 

-(void)button1Click : (id)sender { 

MPMediaPickerController *mediaPicker = [[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeMusic]; 

mediaPicker.delegate = self; 
mediaPicker.allowsPickingMultipleItems = YES; 
mediaPicker.prompt = @"Select songs to play"; 
mediaPicker.showsCloudItems = NO; 

[self presentViewController:mediaPicker animated:YES completion:nil]; 

} 

-(void)mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection { 

    [self dismissViewControllerAnimated:YES completion:nil]; 


MPMediaItem *item = [[mediaItemCollection items]objectAtIndex:0]; 
NSURL *myURL = [item valueForProperty:MPMediaItemPropertyAssetURL]; 


NSError *err1; 


self.avAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:myURL error:&err1]; 


if (err1) { 

    NSLog(@"@err1 : %@",[err1 localizedDescription]); 

} 


[self.avAudioPlayer play]; 


if ([mediaItemCollection items].count >1) { 

    MPMediaItem *item2 = [[mediaItemCollection items]objectAtIndex:1]; 
    NSURL *myURL2 = [item2 valueForProperty:MPMediaItemPropertyAssetURL]; 
    NSError *err2; 
    self.avAudioPlayer2 = [[AVAudioPlayer alloc]initWithContentsOfURL:myURL2 error:&err2]; 
    if (err2) { 
     NSLog(@"err2 : %@",[err2 localizedDescription]); 
    } 
    [self.avAudioPlayer2 play]; 

} 

// NSLog(@"mediaitemCollection : %@",[mediaItemCollection items]); 


} 

-(void)mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker { 

[self dismissViewControllerAnimated:YES completion:nil ]; 

} 

@end 

クリックして再生ボタンと、我々はYESにallowsPickingMultipleItemsを設定するので、2つの音楽ファイルを選びます。

私のipadでうまく動作します。必要に応じて迅速に変換してください。それは難しい仕事ではないと思います。

これがあなたの問題を解決することを願っています。 :)