Xcodeでオーディオ（mp3）を再生する際の問題

Question

私のアプリケーションでは次の問題があります。再生ボタンを押すと、mp3が再生を開始し、アプリケーションも終了します。

SongDetailsViewController.h

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

@interface SongDetailsViewController : UIViewController <AVAudioPlayerDelegate> { 
    AVAudioPlayer *player; 
    NSString *songID; 
    NSString *species; 
} 
- (void) dismissModal:(id)sender; 
- (IBAction) playCall:(id)sender; 
- (IBAction) pauseCall:(id)sender; 
- (IBAction) stopCall:(id)sender; 

@property (nonatomic, retain)  AVAudioPlayer  *player; 
@property (nonatomic, copy)  NSString   *songID; 
@property (nonatomic, copy)  NSString   *species; 
@end 

そしてSongDetailsViewController.m

- (IBAction) pauseCall:(id)sender{ 
    [player pause]; 
} 
- (IBAction) stopCall:(id)sender 
{ 
    [player stop]; 
} 

- (IBAction) playCall:(id)sender{ 
    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
    NSString *documentsDir = [documentPaths objectAtIndex:0]; 
    NSString *songPath = [documentsDir stringByAppendingPathComponent:@"songs"]; 
    NSString *mySongPath = [songPath stringByAppendingPathComponent:[songID stringByAppendingString:@".mp3"]]; 

    NSURL *file = [[NSURL alloc] initFileURLWithPath:mySongPath]; 
    player = [[AVAudioPlayer alloc] initWithContentsOfURL:file error:nil]; 
    player.delegate=self; 
    [player prepareToPlay]; 
    [player play]; 
} 

エラー・スタック。

2011-12-29 20:04:40.508 Bird Call Player[6266:307] -[SongDetailsViewController playNote:]: unrecognized selector sent to instance 0x1bcdb0 
2011-12-29 20:04:40.531 Bird Call Player[6266:307] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[SongDetailsViewController playNote:]: unrecognized selector sent to instance 0x1bcdb0' 
*** Call stack at first throw: 
(
    0 CoreFoundation      0x344aaed3 __exceptionPreprocess + 114 
    1 libobjc.A.dylib      0x33975811 objc_exception_throw + 24 
    2 CoreFoundation      0x344ac683 -[NSObject(NSObject) doesNotRecognizeSelector:] + 102 
    3 CoreFoundation      0x344541d9 ___forwarding___ + 508 
    4 CoreFoundation      0x34453f90 _CF_forwarding_prep_0 + 48 
    5 CoreFoundation      0x34452719 -[NSObject(NSObject) performSelector:withObject:withObject:] + 24 
    6 UIKit        0x31b30141 -[UIApplication sendAction:to:from:forEvent:] + 84 
    7 UIKit        0x31b300e1 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 32 
    8 UIKit        0x31b300b3 -[UIControl sendAction:to:forEvent:] + 38 
    9 UIKit        0x31b2fe05 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 356 
    10 UIKit        0x31b30453 -[UIControl touchesEnded:withEvent:] + 342 
    11 UIKit        0x31b2eddd -[UIWindow _sendTouchesForEvent:] + 368 
    12 UIKit        0x31b2e757 -[UIWindow sendEvent:] + 262 
    13 UIKit        0x31b299ff -[UIApplication sendEvent:] + 298 
    14 UIKit        0x31b29337 _UIApplicationHandleEvent + 5110 
    15 GraphicsServices     0x3026c04b PurpleEventCallback + 666 
    16 CoreFoundation      0x3443fce3 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 26 
    17 CoreFoundation      0x3443fca7 __CFRunLoopDoSource1 + 166 
    18 CoreFoundation      0x3443256d __CFRunLoopRun + 520 
    19 CoreFoundation      0x34432277 CFRunLoopRunSpecific + 230 
    20 CoreFoundation      0x3443217f CFRunLoopRunInMode + 58 
    21 GraphicsServices     0x3026b5f3 GSEventRunModal + 114 
    22 GraphicsServices     0x3026b69f GSEventRun + 62 
    23 UIKit        0x31ad-[UIApplication _run] + 402 
    24 UIKit        0x31ace12f UIApplicationMain + 670 
    25 Bird Call Player     0x000026cb main + 122 
    26 Bird Call Player     0x00002114 start + 40 
) 
terminate called after throwing an instance of 'NSException' 

私はinitWithNibNameにplayCall内のコードを移動した場合、それが正常に動作します。誰かが私がやった間違いが何であるか把握する手助けができますか？

事前に

Answer 1

理由をあなたに感謝：「 - [SongDetailsViewController playNote：]：認識されていないセレクタはインスタンス0x1bcdb0に送られた」あなたはボタンのプレイにあなたのplayCall IBActionを設定するか、または別のアクション名がありましたXIBで ？