Vibrator - nothing happens

[yocal]

Heya all,

Still new to this, but im trying the best i can :-) Right now i've ran into a wall though...

I'm trying to make the phone vibrate by the click of a button.

- I've added the AudioToolbox-framework and imported it.
- I've connected my button to the method
- The button triggers the alert im making in the very same method
- The vibration is completely ignored
- The app doesnt crash - it just doesnt vibrate >.<

Any idea why? I've tried on several phones (All 4's with iOS 4.1):

- (IBAction)activateVibrator:(id)sender {

    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
    
    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"It vibrated!"
                          message:nil
                          delegate:nil
                          cancelButtonTitle:nil
                          otherButtonTitles:@"OK", nil];
    [alert show];
    [alert release];
    
}

Im kinda confused

// Yoc.

[rickrets]

Did you do this:

#import <AudioToolbox/AudioToolbox.h>

??

[Justinmichael]

Had to laugh at the thread title. lol. Immature, I know.

[yocal]

Originally Posted by yocal

- I've added the AudioToolbox-framework and imported it.

Certainly did, rickrets :-) I guess it wouldnt have compiled if i didnt :-P

It runs just fine, shows altert; but no vibration >.<

Justinmichael; heh - it wasnt even on purpose :-P

// Yoc.

[rickrets]

Yeah I noticed, after this thread I found a place to use vibration in the app I'm working on

But I can't test it at the moment, I had to download SDK 4.1 *sigh*, downloading @ work place is NOT going fast! In 60 minutes I can test it and will tell you by then if it worked at my project or not!

Cheers

[Justinmichael]

Heh, wish I could help though bud. Not sure why it isn't working. Are you definitely trying on a phone and not an iPod? Heard that iPod doesn't vibrate.

Documentation suggests what you have wrote is correct. I'll have a dig around.

[yocal]

Originally Posted by Justinmichael

Heh, wish I could help though bud. Not sure why it isn't working. Are you definitely trying on a phone and not an iPod? Heard that iPod doesn't vibrate.

Documentation suggests what you have wrote is correct. I'll have a dig around.

Yeah, im pretty sure that my phone is an iPhone 4 It's happy to vibrate on incomming calls, so it isnt because the vibrator is broken either, hehe.

[Justinmichael]

I imported AudioToolkit and put the same code into an init method and it vibrated fine on my iPhone 4. It was very short though (and quite weak).

Try moving the vibrate call into your init method and see if it fires.

[Justinmichael]

You do have to remember to add the AudioToolkit to your Target. If you do getInfo on the target and click '+' then choose 'AudioToolkit'

[yocal]

Originally Posted by Justinmichael

You do have to remember to add the AudioToolkit to your Target. If you do getInfo on the target and click '+' then choose 'AudioToolkit'

Bleh, still nothing...

I've tried to attach the code - would you give it a shot and see if it works for you?

Im using xcode 4, preview 3 - could that be why?

// Yoc.

[Justinmichael]

Yeah, I've had a look. The libraries are showing up red so think something has gone wrong with the import. Delete the Red libraries and then add them again by pressing 'applekey + I Key' on Targets -> HelloItaly and then pressing + and add AudioToolbox + AVFoundation + CoreMotion + CoreLocation.

[Justinmichael]

Cancel that, was nothing to do with it. For some reason it doesn't work when you put it in the IBAction but putting it in ViewDidLoad works fine.

I'm trying to figure out why.

[yocal]

Originally Posted by Justinmichael

Yeah, I've had a look. The libraries are showing up red so think something has gone wrong with the import. Delete the Red libraries and then add them again by pressing 'applekey + I Key' on Targets -> HelloItaly and then pressing + and add AudioToolbox + AVFoundation + CoreMotion + CoreLocation.

I think its because im using xcode 4, inthere they seem fine. If i open the project in xcode 3, they're red, even the UIKit, Foundation and CoreGraphics are red >.<

And i cant seem to add AVFoundation, CoreMotion or CoreLocation; they arent listed...

Anyways, wouldnt it fail to compile if it cannot find the framework?

// Yoc.

[Justinmichael]

It is fine in xCode 4 and in your code if it is in the viewDidLoad method. For some reason it doesn't like it coming off the IBAction which I can't figure out. I've tried all sorts of different perform selector methods to trick it.

Really not sure on this one. Anyone have any ideas why vibrate would work on viewDidLoad but not in an IBAction method (that is definitely being called).

[rickrets]

It works perfectly fine here, in a void method...

[Justinmichael]

Yeah, that's what I thought. Just hates IBAction for some reason.

[Kalimba]

Is it possible that the vibration "sound" is queued up properly, but showing the alert causes all pending sounds to be canceled? According to to docs, AudioServicesPlaySystemSound() does not allow simultaneous playback of multiple sounds, so perhaps showing the alert causes the vibration sound to get stomped by... something else. Try playing the vibration after you show the alert and see what happens.

[yocal]

Originally Posted by Kalimba

Is it possible that the vibration "sound" is queued up properly, but showing the alert causes all pending sounds to be canceled? According to to docs, AudioServicesPlaySystemSound() does not allow simultaneous playback of multiple sounds, so perhaps showing the alert causes the vibration sound to get stomped by... something else. Try playing the vibration after you show the alert and see what happens.

I've tried moving it to the viewDidLoad, and it vibrates just fine... Then i tried to put the vibration in a void method and calling that from my IBOutlet:

- (IBAction)activateVibrator:(id)sender {

    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"It vibrated!"
                          message:nil
                          delegate:nil
                          cancelButtonTitle:nil
                          otherButtonTitles:@"OK", nil];
	[alert show];
    [alert release];
    
    [self buzz];
} 

- (void)buzz {
    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
}

But that was a nogo as well :-(

// Yoc.

[rTicker]

Try making a NSTimer in the IBAction endpoint it to -(void)buzz?