使用iPhone SDK播放MP3文件

Question

使用暂停按钮播放音乐文件（如Mp3）最简单的方法是什么？ 非常非常简单的按钮播放和另一个按钮暂停音乐.. 你可以写代码！

Answer 1

这些是请求的操作的代码， appSoundPlayer是在h文件中声明的AVAudioPlayer的属性。另外这个例子在资源文件夹中播放歌曲。

#pragma mark - 
    #pragma mark *play* 
    - (IBAction) playaction { 

     NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"songname" ofType:@"mp3"]; 
     NSURL *newURL = [[NSURL alloc] initFileURLWithPath: soundFilePath]; 
     self.soundFileURL = newURL; 
     [newURL release]; 
     [[AVAudioSession sharedInstance] setDelegate: self]; 
     [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryAmbient error: nil]; 

    // Registers the audio route change listener callback function 
    AudioSessionAddPropertyListener (
            kAudioSessionProperty_AudioRouteChange, 
            audioRouteChangeListenerCallback, 
            self 
            ); 

    // Activates the audio session. 

    NSError *activationError = nil; 
    [[AVAudioSession sharedInstance] setActive: YES error: &activationError]; 

    AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: soundFileURL error: nil]; 
    self.appSoundPlayer = newPlayer; 
    [newPlayer release]; 
    [appSoundPlayer prepareToPlay]; 
    [appSoundPlayer setVolume: 1.0]; 
    [appSoundPlayer setDelegate: self]; 
    [appSoundPlayer play]; 


    [stopbutton setEnabled:YES]; 
    [playbutton setEnabled: NO]; 
    playbutton.hidden=YES; 
    pausebutton.hidden =NO; 
}//playbutton touch up inside 

#pragma mark - 
#pragma mark *pause* 
-(IBAction)pauseaction { 
    [appSoundPlayer pause]; 
    pausebutton.hidden = YES; 
    resumebutton.hidden = NO; 

}//pausebutton touch up inside 

#pragma mark - 
#pragma mark *resume* 
-(IBAction)resumeaction{ 
    [appSoundPlayer prepareToPlay]; 
    [appSoundPlayer setVolume:1.0]; 
    [appSoundPlayer setDelegate: self]; 
    [appSoundPlayer play]; 
    playbutton.hidden=YES; 
    resumebutton.hidden =YES; 
    pausebutton.hidden = NO; 

}//resumebutton touch up inside 

#pragma mark - 
#pragma mark *stop* 
-(IBAction)stopaction{ 

    [appSoundPlayer stop]; 
    [playbutton setEnabled:YES]; 
    [stopbutton setEnabled:NO]; 
    playbutton.hidden=NO; 
    resumebutton.hidden =YES; 
    pausebutton.hidden = YES; 

}//stopbutton touch up inside 

Answer 2

The Apple documentation here应该有你需要知道的一切。

Answer 3

well here是一个很好的教程。

的主题是

NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/audiofile.mp3", [[NSBundle mainBundle] resourcePath]]]; 

    NSError *error; 
    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error]; 
    audioPlayer.numberOfLoops = -1; 

[audioPlayer play]; 

，当要暂停;

[audioPlayer pause]; 

希望这有助于。

Answer 4

短的声音，或者当MP3上不建议代码打得好，你可以随时使用：

SystemSoundID soundID; 
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/sound.mp3", [[NSBundle mainBundle] resourcePath]]]; 

AudioServicesCreateSystemSoundID((CFURLRef)url, &soundID); 
AudioServicesPlaySystemSound (soundID); 

不要忘了补充：对

#import <AudioToolbox/AudioToolbox.h> 

Answer 5

的oalTouch示例代码Apple iOS开发人员网站可以完成您想要的任务，并且可以运行。

它还显示了如何测试另一个应用程序（例如ipod）是否已经在播放文件，如果您想允许用户听自己的音乐而不是您的音乐，这很方便。

Answer 6

DIRAC API是免费的并且非常易于使用。 我们已经用它在我说话的机器人应用http://itunes.apple.com/us/app/daidai/id484833168，它一直令人惊异的是我怎么设法改变速度和语音的音调

http://www.dspdimension.com/download/

Answer 7

恐怕答案中规定不再适用iOS 7及以上版本。您将需要使用下面的代码：

在头文件（.h）中

为了处理委托方法时，音频的播放结束audioPlayerDidFinishPlaying像:,从AVAudioPlayerDelegate继承。

@property (nonatomic, strong) AVAudioPlayer *player; 

在实现文件（.M）

NSString *soundFilePath = [[NSBundle mainBundle] pathForResource: resourceName 
                  ofType: @"mp3"]; 
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath]; 

AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: fileURL 
                    error: nil]; 
_player = newPlayer; 
[_player prepareToPlay]; 
[_player setDelegate: self]; 
[_player play]; 

Answer 8

我喜欢简单的代码，这里是我的解决方案：（记住添加开关按钮让音乐播放玩得开心）

#import "ViewController.h" 
#import <AVFoundation/AVFoundation.h> 

@interface ViewController() 
{ 
    NSURL*     bgURL; 
    AVAudioPlayer*   bgPlayer; 
} 
@end 

@implementation ViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    bgURL = [[NSURL alloc] initFileURLWithPath: [[NSBundle mainBundle] pathForResource:@"sample" ofType:@"mp3"]]; 
    bgPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:bgURL error:nil]; 
} 

#pragma mark AVAudioPlayer 
- (IBAction)toggleMusic:(UISwitch*)sender { 
    NSLog(@"togging music %s", sender.on ? "on" : "off"); 

    if (bgPlayer) { 

     if (sender.on) { 
      [bgPlayer play]; 
     } 
     else { 
      [bgPlayer stop]; 
     } 
    } 
}