我似乎无法弄明白。
我可以播放一个声音:
- (void) initSounds {
// Get the main bundle for the app
CFBundleRef mainBundle;
mainBundle = CFBundleGetMainBundle ();
// Get the URL to the sound file to play
soundFileURLRef = CFBundleCopyResourceURL (mainBundle,CFSTR ("1"),CFSTR ("wav"),NULL);
// Create a system sound object representing the sound file
AudioServicesCreateSystemSoundID (soundFileURLRef, &soundFileObject);
}
-(void) play {
AudioServicesPlaySystemSound(self.soundFileObject);
}
但我想创建一个SystemSoundID对象数组。当我尝试这样做时,我不断收到错误。有人能告诉我创建soundFileObjects数组的代码以及我如何在AudioServicesPlaySystemSound中使用该数组吗?
答案 0 :(得分:7)
SystemSoundID
是一个完整的非类类型,所以你需要使用像NSNumber
这样的包装器将它存储在像NSArray
这样的Cocoa容器中:
// assuming this property:
@property (copy) NSArray *soundFileObjects;
// creating the array:
soundFileObjects = [[NSArray alloc] initWithObjects:
[NSNumber numberWithUnsignedLong:soundId],
// more ?
nil];
// using it, e.g.:
SystemSoundID sid = [[self.soundFileObjects objectAtIndex:0] unsignedLongValue];
AudioServicesPlaySystemSound(sid);