AVAudioPlayer的问题 [英] Problems with AVAudioPlayer

问题描述

我是iPhone-Development的新手。

I'm new to the iPhone-Development.

我想在点击UIButton时播放声音。我尝试了以下内容：

I want to play a Sound when an UIButton is tapped. I tried the following:

ViewController.h：

ViewController.h:

@interface JahrenzeitenViewController : UIViewController <AVAudioPlayerDelegate> {

    UIButton *button_PlaySound;
    AVAudioPlayer *audioPlayer;
}

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

ViewController.m

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App，我会收到以下错误：

If I try to run the App, I get the following error:

架构i386的未定义符号：
_ OBJC_CLASS _ $ _ AVAudioPlayer，引自：
objc-class-ref in JahrenzeitenViewController.o
ld：找不到架构的符号i386
collect2：ld返回1退出状态

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

我也尝试过更改行

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，我得到了DebugMessage我的NSLog在playSound中 - 方法：

Then I don't get the error above, but its still not playing and i get the DebugMessage from my NSLog in the "playSound"-Method:

播放声音时出错。 （NULL）

Error playing sound. (NULL)

我希望你能帮助我。提前谢谢：）

I hope you can help me. Thank you in advance :)

推荐答案

您需要添加 AVFoundation 您项目的框架。 （右键单击主目标，然后添加现有框架）。

You need to add the AVFoundation framework to your project. (right-click on your main target then add existing framework).

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