Objective CのAudioToolboxへの参照エラー

Question

wavファイルを再生しようとしているシンプルなRoulettアプリケーションで、次のエラーが表示されます。私は何の警告フラグがコードに出てくるんので、エラーが何を意味するのかわからないんだけど、私はここで

をインポートしたエラーです：

Undefined symbols:
"_AudioServicesCreateSystemSoundID", referenced from: -[CustomPickerViewController playWinSound] in CustomPickerViewController.o -[CustomPickerViewController spin:] in CustomPickerViewController.o "_AudioServicesPlaySystemSound", referenced from: -[CustomPickerViewController playWinSound] in CustomPickerViewController.o -[CustomPickerViewController spin:] in CustomPickerViewController.o ld: symbol(s) not found collect2: ld returned 1 exit status
"_AudioServicesCreateSystemSoundID", referenced from: -[CustomPickerViewController playWinSound] in CustomPickerViewController.o -[CustomPickerViewController spin:] in CustomPickerViewController.o "_AudioServicesPlaySystemSound", referenced from: -[CustomPickerViewController playWinSound] in CustomPickerViewController.o -[CustomPickerViewController spin:] in CustomPickerViewController.o ld: symbol(s) not found collect2: ld returned 1 exit status

そして、ここのコードです：

#import "CustomPickerViewController.h" 
#import <AudioToolbox/AudioToolbox.h> 

@implementation CustomPickerViewController 
@synthesize picker; 
@synthesize winLabel; 
@synthesize column1; 
@synthesize column2; 
@synthesize column3; 
@synthesize column4; 
@synthesize column5; 
@synthesize button; 

- (void)showButton 
{ 
    button.hidden = NO; 
} 

-(void)playWinSound 
{ 
    NSString *path = [[NSBundle mainBundle] pathForResource:@"win" ofType:@"wav"]; 
    SystemSoundID soundID; 
    AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath:path], &soundID); 
    AudioServicesPlaySystemSound (soundID);  
    winLabel.text = @"WIN!"; 
    [self performSelector:@selector(showButton) withObject:nil afterDelay:1.5]; 
} 



-(IBAction)spin:(id)sender 
{ 
    BOOL win = NO; 
    int numInRow = 1; 
    int lastVal = -1; 
    for (int i = 0; i < 5; i++) 
    { 
     int newValue =random() % [self.column1 count]; 

     if (newValue == lastVal) 
      numInRow++; 
     else 
      numInRow = 1; 

     lastVal = newValue; 
     [picker selectRow:newValue inComponent:i animated: YES]; 
     [picker reloadComponent:i]; 
     if (numInRow >= 3) 
      win = YES; 
    } 

    button.hidden = YES; 
    NSString *path = [[NSBundle mainBundle] pathForResource:@"crunch"ofType:@"wav"]; 
    SystemSoundID soundID; 
    AudioServicesCreateSystemSoundID((CFURLRef) [NSURL fileURLWithPath:path], &soundID); 
    AudioServicesPlaySystemSound(soundID); 

    if (win) 
     [self performSelector:@selector(playWinSound) withObject: nil afterDelay: .5]; 
    else 
     [self performSelector:@selector(showButton) withObject: nil afterDelay: .5]; 

    winLabel.text = @""; 
} 

Answer 1

見つけました。私はフレームワークAudioToolbox.FrameworkをXCodeにインポートしていないと認識しました。 :)