Cocos2d-iphone : Handle Button Press and Release

Question

Actually I need to move my sprite as long as button is pressed and the sprite should be stopped when button is released.

My code is below:

 CCMenuItemFont *item1 = [CCMenuItemFont itemFromString: @"icon.png" target:self selector:@selector(doit)]; CCMenu * taskMenu = [CCMenu menuWithItems:item1, nil]; [self addChild:taskMenu]; -void()doit { spritevelocity = 80; }

The above code makes my sprite keep on moving when the button is tapped, but I need to stop my sprite as soon as button is released.

I tried below code but no success:

-void()doit { buttonpressed = YES; if (buttonpressed) { spritevelocity = 80; } } - (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { buttonpressed = NO; }

Note:I just wanted to make spritevelocity = 0 to stop my sprite,,That is i want spritevelocity = 0 when button is released

The code you posted doesn't compile.

James Webster
– James Webster

2012-06-25 16:14:37 +00:00
Commented Jun 25, 2012 at 16:14 — James Webster
– James Webster, Commented Jun 25, 2012 at 16:14
How can we work with an example that doesn't work.

James Webster
– James Webster

2012-06-25 16:36:40 +00:00
Commented Jun 25, 2012 at 16:36 — James Webster
– James Webster, Commented Jun 25, 2012 at 16:36

SentineL · Accepted Answer · 2012-06-25 16:18:28Z

1

You need to subclass CCMenuItem in case to override selected, unselected and activate methods. there, you can force you button to act as you whant to. In this case, act not only on press, but on release too. Here is a good example of overriding CCMenu: http://johnehartzog.com/2009/10/easy-to-create-buttons-with-cocos2d/

answered Jun 25, 2012 at 16:18

SentineL

4,7225 gold badges23 silver badges38 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

vishnu Over a year ago

hello sentinel,, my button works fine...but the sprite keeps on moving when button is tapped .It is not stopping even after release,i want to stop when button is released

SentineL Over a year ago

to do this, you need to catch button release moment. to do this, you need subclass button.

vishnu Over a year ago

I cannot understand that example sentinel...can i get another example

YvesLeBorg Over a year ago

as @SentineL sais, subclass the type of button you want. Also override the 'unselected' method. Your class will be served a callback to that method when the button becomes unselected for any reason (finger off, finger slides off label, finger slides off screen). In that method, set the sprite velocity to 0.

SentineL Over a year ago

Sorry, I have no more examples. In my project I used that one. Hope, YvesLeBrog's post makes it more clear.

sergio · Accepted Answer · 2012-06-25 16:27:00Z

0

Why don't you set the velocity directly?

- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { buttonpressed = NO; spritevelocity = 0; }

Could you explain when is doIt called?

answered Jun 25, 2012 at 16:27

sergio

69k11 gold badges105 silver badges123 bronze badges

3 Comments

vishnu Over a year ago

Yea i tried it but it works when i touch somewhere else on screen , but not when i press and release CCMenu button.

vishnu Over a year ago

check CCMenuItemFont *item1 = [CCMenuItemFont itemFromString: @"icon.png" target:self selector:@selector(doit)]; ,,

sergio Over a year ago

I oversaw that, sorry... I think that @SentineL gave you the right answer... you need to override the standard behavior of cocos2d buttons to handle the "touchUp" event...

Collectives™ on Stack Overflow

Cocos2d-iphone : Handle Button Press and Release

2 Answers 2

5 Comments

3 Comments

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

5 Comments

3 Comments

Related