AVAudioPlayer的问题

Question

我是iPhone-Development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:

没有找到符号(S)为i386硬件架构collect2:为i386硬件架构未定义的符号: "_OBJC_CLASS _ $ _ AVAudioPlayer",从引用:objc级,裁判在JahrenzeitenViewController.o LD LD返回1个退出状态

我也试过换线

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

至

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"中从我的NSLog获取DebugMessage -Method:

播放声音时出错.(空值)

我希望你能帮助我.先感谢您 :)

Answer 1

您需要将AVFoundation框架添加到项目中.(右键单击主目标,然后添加现有框架).

Answer 2

添加到其他答案.

您应该始终查看类'Ie AVAudioPlayer的文档.当您打算使用它时,您不熟悉.在类的文档(类引用)的顶部,是一个表,显示该类属于哪个框架:

一旦你知道这个,就把框架添加到项目中.并且还将其导入到标题(.h)文件中,正如其他人指出的那样