如何播放多种声音？

Question

我需要播放多个声音文件。我有以下代码：

我的.h课程：

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

@interface ViewController : UIViewController {
    AVAudioPlayer *musicPlayer;
}

- (IBAction)music1:(id)sender;
- (IBAction)music2:(id)sender;
- (IBAction)music3:(id)sender;
- (IBAction)music4:(id)sender;
- (IBAction)music5:(id)sender;

@end

我的.m文件

#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

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

- (IBAction)music1:(id)sender {

    if(musicPlayer.isPlaying)
    {
        [musicPlayer pause];
        return;
    }
    if(musicPlayer == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music1" ofType:@"wav" ]];
        musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [musicPlayer play];
}

- (IBAction) music2:(id)sender {

    if(musicPlayer.isPlaying)
    {
        [musicPlayer pause];
        return;
    }
    if(musicPlayer == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music2" ofType:@"wav" ]];
        musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [musicPlayer play];
}

- (IBAction) music3:(id)sender {

    if(musicPlayer.isPlaying)
    {
        [musicPlayer pause];
        return;
    }
    if(musicPlayer == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music3" ofType:@"wav" ]];
        musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [musicPlayer play];
}

- (IBAction) music4:(id)sender {

    if(musicPlayer.isPlaying)
    {
        [musicPlayer pause];
        return;
    }
    if(musicPlayer == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music4" ofType:@"wav" ]];
        musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [musicPlayer play];
}

- (IBAction) music5:(id)sender {

    if(musicPlayer.isPlaying)
    {
        [musicPlayer pause];
        return;
    }
    if(musicPlayer == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music5" ofType:@"wav" ]];
        musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [musicPlayer play];
}
@end

但是这段代码不起作用：只播放一个音乐文件。其他文件不是。

另外，还有一个例子：
Music1正在播放。

我按下Music2按钮 - ＆gt; Music1结束，Music2开始。

我如何修改代码？

Answer 1

每个声音都需要AVAudioPlayer：

·H：

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

            @interface ViewController : UIViewController {
                AVAudioPlayer *musicPlayer1;
                AVAudioPlayer *musicPlayer2;
                AVAudioPlayer *musicPlayer3;
                AVAudioPlayer *musicPlayer4;
                AVAudioPlayer *musicPlayer5;

NSMutableArray playingMusicArray;

            }

            - (IBAction)music1:(id)sender;
            - (IBAction)music2:(id)sender;
            - (IBAction)music3:(id)sender;
            - (IBAction)music4:(id)sender;
            - (IBAction)music5:(id)sender;

        @end

.m：

#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    playingMusicArray = [[NSMutableArray alloc] init];
}

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



- (void)stopPlayingMusic {
    for(AVAudioPlayer *audioPlayer in playingMusicArray)
    {
        [audioPlayer pause];
        [playingMusicArray removeObject:audioPlayer];


    }
}
- (IBAction)music1:(id)sender {


    [self stopPlayingMusic];
    if(musicPlayer1 == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music1" ofType:@"wav" ]];
        musicPlayer1 = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [playingMusicArray addObject:musicPlayer1];
    [musicPlayer1 play];
}

- (IBAction) music2:(id)sender {

    [self stopPlayingMusic];
    if(musicPlayer2 == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music2" ofType:@"wav" ]];
        musicPlayer2 = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [playingMusicArray addObject:musicPlayer2];

    [musicPlayer2 play];
}

- (IBAction) music3:(id)sender {

    [self stopPlayingMusic];

    if(musicPlayer3 == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music3" ofType:@"wav" ]];
        musicPlayer3 = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [playingMusicArray addObject:musicPlayer3];

    [musicPlayer3 play];
}

- (IBAction) music4:(id)sender {

    [self stopPlayingMusic];

    if(musicPlayer4 == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music4" ofType:@"wav" ]];
        musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [playingMusicArray addObject:musicPlayer4];

    [musicPlayer4 play];
}

- (IBAction) music5:(id)sender {

    [self stopPlayingMusic];

    if(musicPlayer5 == nil)
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music5" ofType:@"wav" ]];
        musicPlayer5 = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    }
    [playingMusicArray addObject:musicPlayer5];

    [musicPlayer5 play];
}
@end