Static method variable issue

Question

I created class for handling sounds. But I've problem to stop sound? I can't send variable from playSound to stopSound AudioServicesDisposeSystemSoundID(soundID). How to handle this? I really don't want instantiate it or I've to?

@implementation SoundPlayer
+(void)playSound:(NSString *)filename ofType:(NSString *)extension {
    SystemSoundID soundID;
    NSString *soundFile = [[NSBundle mainBundle] pathForResource:filename ofType:extension];
    AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath:soundFile], &soundID);
    AudioServicesPlaySystemSound(soundID); // error - soundID is undeclared
}

+(void)stopSound
{
    AudioServicesDisposeSystemSoundID(soundID);
}

@end

score 1 · Accepted Answer · answered Nov 22 '12 at 12:21

1

You'll either have to pass the id to stopSound (the same as when you play sound), or else if your audio player only plays 1 sound at a time, store the soundID as a static param on the class when you play.

answered Nov 22 '12 at 12:21

cleverbit

5,514
5
28
38

and how can I declare static param? – alexhajdu Nov 22 '12 at 12:30
`@interface TheClass : NSObject + (int)count; @end` see: http://stackoverflow.com/questions/6035824/objective-c-static-class-variables – cleverbit Nov 22 '12 at 12:32

score 0 · Answer 2 · answered Nov 22 '12 at 12:21

0

You can create soundID as ivar, something like:

@interface SoundPlayer(){
     SystemSoundID soundID;
}
@end

Other way use it as global variable

answered Nov 22 '12 at 12:21

aknew

1,101
7
23

I tried it as a first option before posting to stackverflow. Instance variable accessed in class method. – alexhajdu Nov 22 '12 at 12:28

Static method variable issue

2 Answers2