Question

我正在为电影歌手写一个小的音板应用程序，我是iPhone SDK的新手

我已使用以下代码将所有按钮链接到他们的Mp3文件，但只有部分按钮播放他们的声音？

我检查了所有文件名，它们都匹配代码：


- (IBAction)canWeBeAlone:(id)sender {
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef soundfileURLRef;
    soundfileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"Can We Be Alone", CFSTR ("mp3"), NULL);
    UInt32 soundID;
    AudioServicesCreateSystemSoundID (soundfileURLRef, &soundID);
    AudioServicesPlaySystemSound(soundID);
}

- (IBAction)itsThreeAM:(id)sender {
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef soundfileURLRef;
    soundfileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"Its 3AM", CFSTR ("mp3"), NULL);
    UInt32 soundID;
    AudioServicesCreateSystemSoundID (soundfileURLRef, &soundID);
    AudioServicesPlaySystemSound(soundID);
}

- (IBAction)iHaveSinned:(id)sender {
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef soundfileURLRef;
    soundfileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"I Have Sinned", CFSTR ("mp3"), NULL);
    UInt32 soundID;
    AudioServicesCreateSystemSoundID (soundfileURLRef, &soundID);
    AudioServicesPlaySystemSound(soundID);
}

- (IBAction)mowMyLawn:(id)sender {
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef soundfileURLRef;
    soundfileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"Mow My Lawn", CFSTR ("mp3"), NULL);
    UInt32 soundID;
    AudioServicesCreateSystemSoundID (soundfileURLRef, &soundID);
    AudioServicesPlaySystemSound(soundID);
}

- (IBAction)theyAreMyFriends:(id)sender {
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef soundfileURLRef;
    soundfileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"They Are My Friends", CFSTR ("mp3"), NULL);
    UInt32 soundID;
    AudioServicesCreateSystemSoundID (soundfileURLRef, &soundID);
    AudioServicesPlaySystemSound(soundID);
}

- (IBAction)itsSteve:(id)sender {
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef soundfileURLRef;
    soundfileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"Its Not Jeffy Its Steve", CFSTR ("mp3"), NULL);
    UInt32 soundID;
    AudioServicesCreateSystemSoundID (soundfileURLRef, &soundID);
    AudioServicesPlaySystemSound(soundID);
}

- (IBAction)itWasWrongOfMe:(id)sender {

    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef soundfileURLRef;
    soundfileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"It Was Wrong of Me", CFSTR ("mp3"), NULL);
    UInt32 soundID;
    AudioServicesCreateSystemSoundID (soundfileURLRef, &soundID);
    AudioServicesPlaySystemSound(soundID);

}

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Answer 1

我相信您应该使用AVAudioPlayer播放MP3文件而不是AudioServicesPlaySystemSound。 AVAudioPlayer支持播放“...同时发出多个声音，每个音频播放器发出一个声音，具有精确同步”。请参阅AVAudioPlayer类参考。这里还有一个项目的链接，显示你如何使用AVAudioPlayer：[http://www.techotopia.com/index.php/Playing_Audio_on_an_iPhone_using_AVAudioPlayer_（iOS_4）] [1]

使用多个按钮播放多个MP3文件 - iPhone SDK - xCode

1 个答案: