iphone - AVAudioPlayer 的问题

Question

我是 iPhone 开发的新手。

我想在点击 UIButton 时播放声音。我尝试了以下方法:

ViewController.h:

@interface JahrenzeitenViewController : UIViewController <AVAudioPlayerDelegate> {

    UIButton *button_PlaySound;
    AVAudioPlayer *audioPlayer;
}

@property (nonatomic, retain) IBOutlet UIButton *button_PlaySound;

ViewController.m

- (IBAction)playSound {

    //[audioPlayer release];
    //audioPlayer = nil;

    NSString *audioFilePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"wav"];
    NSURL *audioFileURL = [NSURL fileURLWithPath:audioFilePath];
    NSError *error = nil;
    audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:&error];
    [audioPlayer setDelegate:self];
    [audioPlayer prepareToPlay];
    [audioPlayer play];
    if (audioPlayer == nil) 
        NSLog(@"Error playing sound. %@", [error description]);
    else
        [audioPlayer play];

如果我尝试运行应用程序，我会收到以下错误:

Undefined symbols for architecture i386: "_OBJC_CLASS_$_AVAudioPlayer", referenced from: objc-class-ref in JahrenzeitenViewController.o ld: symbol(s) not found for architecture i386 collect2: ld returned 1 exit status

我也试过改线

audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:&error];

到

audioPlayer = [audioPlayer initWithContentsOfURL:audioFileURL error:&error];

然后我没有得到上面的错误，但它仍然没有播放，我在“playSound”-Method 中从我的 NSLog 得到了 DebugMessage:

Error playing sound. (NULL)

我希望你能帮助我。提前谢谢你:)

Answer 1

您需要将AVFoundation 框架添加到您的项目中。 (右键单击您的主要目标，然后添加现有框架)。