使用iPhone SDK播放MP3文件

Question

使用暫停按鈕播放音樂文件（如Mp3）最簡單的方法是什麼？ 非常非常簡單的按鈕播放和另一個按鈕暫停音樂.. 你可以寫代碼！

Answer 1

這些是請求的操作的代碼， appSoundPlayer是在h文件中聲明的AVAudioPlayer的屬性。另外這個例子在資源文件夾中播放歌曲。

#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應該有你需要知道的一切。

Answer 3

well here是一個很好的教程。

的主題是

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]; 

，當要暫停;

[audioPlayer pause]; 

希望這有助於。

Answer 4

短的聲音，或者當MP3上不建議代碼打得好，你可以隨時使用：

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

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

不要忘了補充：對

#import <AudioToolbox/AudioToolbox.h> 

Answer 5

的oalTouch示例代碼Apple iOS開發人員網站可以完成您想要的任務，並且可以運行。

它還顯示瞭如何測試另一個應用程序（例如ipod）是否已經在播放文件，如果您想允許用戶聽自己的音樂而不是您的音樂，這很方便。

Answer 6

DIRAC API是免費的並且非常易於使用。 我們已經用它在我說話的機器人應用http://itunes.apple.com/us/app/daidai/id484833168，它一直令人驚異的是我怎麼設法改變速度和語音的音調

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

Answer 7

恐怕答案中規定不再適用iOS 7及以上版本。您將需要使用下面的代碼：

在頭文件（.h）中

爲了處理委託方法時，音頻的播放結束audioPlayerDidFinishPlaying像:,從AVAudioPlayerDelegate繼承。

@property (nonatomic, strong) AVAudioPlayer *player; 

在實現文件（.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

我喜歡簡單的代碼，這裏是我的解決方案：（記住添加開關按鈕讓音樂播放玩得開心）

#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]; 
     } 
    } 
}