音频文件没有播放iphone sdk

Question

I am trying to play audio file in my iphone app.I have used this code

#import <AVFoundation/AVFoundation.h>

 NSBundle *bundle = [NSBundle mainBundle];
    NSString *musicPath = [bundle pathForResource:@"audioSample" ofType:@"mp3"];
    NSURL *musicURL = [NSURL fileURLWithPath:musicPath];
    NSError *error= [NSError errorWithDomain:@"Domain" code:0 userInfo:nil];

    AVAudioPlayer *aplayer= [[AVAudioPlayer alloc] initWithContentsOfURL:musicURL error:&error];
    aplayer.delegate = self;
    [aplayer play];

But will running this app i am getting this error.Can anyone please help me to solve this.I am not getting that why this error is occurring.

System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn:  dlopen(/System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn, 262): Symbol not found: ___CFObjCIsCollectable
  Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security
  Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
 in /System/Library/Frameworks/Security.framework/Versions/A/Security
2012-08-03 10:12:07.330 SampleAudioCode[591:12003] Error loading /Library/Audio/Plug-Ins/HAL/Digidesign CoreAudio.plugin/Contents/MacOS/Digidesign CoreAudio:  dlopen(/Library/Audio/Plug-Ins/HAL/Digidesign CoreAudio.plugin/Contents/MacOS/Digidesign CoreAudio, 262): Symbol not found: ___CFObjCIsCollectable
  Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security
  Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
 in /System/Library/Frameworks/Security.framework/Versions/A/Security
2012-08-03 10:12:07.330 SampleAudioCode[591:12003] Cannot find function pointer NewDigiCoreAudioPlugIn for factory B8A063B5-2F3D-444A-88CB-D0B8F1B22042 in CFBundle/CFPlugIn 0xdc50f50 </Library/Audio/Plug-Ins/HAL/Digidesign CoreAudio.plugin> (bundle, not loaded)

Thank you for your answer..

Answer 1

This seems to be a problem with the AVAudio frameworks when using the iOS simulator only. Testing on actual hardware (an iPad 2 & iPad 1, in my case) does not produce these same errors

This error is just console noise from a System framework, you should ignore it, it doesn't affect you. If your app is crashing or failing to play the real reason is elsewhere.

and please also add CoreFoundation framwork.

Answer 2

First you have to Add The AVFoundation Framework

For that follow this Step

• Expand the Targets branch in the Groups & Files panel of the project
• Control-click or right-click the AudioPlayer item
• Choose Add > Existing Frameworks…
• Click the + button at the bottom left beneath Linked Libraries
• Choose AVFoundation.framework and click Add
• AVFoundation.framework will now be listed under Linked Libraries. Close the window

Now in .h file Include this framework And Create instance of avaudio player

#import <AVFoundation/AVFoundation.h>

and in interface section

AVAudioPlayer *audioPlayer;

Now in Your .M file Use this code where you want to play .mp3 file.

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

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

if (audioPlayer == nil)
    NSLog([error description]);             
else 
    [audioPlayer play];

Answer 3

I think this is Useful for AudioPlayer...

-(void)play
{
    [audioPlayer stop];

    NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@",[soundArry objectAtIndex:pageNo.currentPage]] ofType:@"mp3"]]; 

    audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    [audioPlayer play];


}

soundArry is My SoundArray. pageNo is My PageControl.

Answer 4

I think this is Useful for Audio play:

NSString *filePath=[[NSBundle mainBundle] pathForResource:@"audiofile" ofType:@"mp3"]; 

NSURL *url = [NSURL fileURLWithPath:filePath];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = -1;
if (audioPlayer == nil)
      NSLog([error description]);               
else 
     [audioPlayer play];