Cocos2d fade in/out action to repeat forever

Question

I'm trying to make a method for my CCSprite based Player class to start the player instance fading in and out until stopped by calling stopAllActions.

In my Player class I have:

- (void)pulse
{
    [self setOpacity:1.0];
    CCAction *fadeIn = [CCFadeTo actionWithDuration:0.5 opacity:0.5];
    CCAction *fadeOut = [CCFadeTo actionWithDuration:0.5 opacity:1.0];

    CCSequence *pulseSequence = [CCSequence actions:
                                 fadeIn, // I get a warning about incompatible pointer types...
                                 fadeOut, 
                                 nil];
    [self runAction:pulseSequence];
}

This doesn't work and doesn't address the repeat forever part. I know I should probably use CCRepeatForever but I'm not seeing how to implement it correctly.

Thanks!

Solution

I have not run this, but I think others have succeeded with something like:

- (void)pulse
{
    [self setOpacity:1.0];
    CCFadeTo *fadeIn = [CCFadeTo actionWithDuration:0.5 opacity:127];
    CCFadeTo *fadeOut = [CCFadeTo actionWithDuration:0.5 opacity:255];

    CCSequence *pulseSequence = [CCSequence actionOne:fadeIn two:fadeOut];
    CCRepeatForever *repeat = [CCRepeatForever actionWithAction:pulseSequence];
    [self runAction:repeat];
}

Comments

[Steve]

I'm still gettting the incompatible pointer errors for both fade actions. ~/Player.m: warning: Semantic Issue: Incompatible pointer types sending 'CCAction *' to parameter of type 'CCFiniteTimeAction *'

[Steve]

although if I change CCAction to CCFiniteTimeAction the error goes away and it works... why would that be?

[Steinbitglis]

I understand now, you typecasted to CCAction when you didn't have to. CCFadeTo inherits CCFiniteTimeAction. That is all CCSequence needs to know. I edited my answer accordingly.

[Steve]

Thanks - works now too. One more thing... the opacity property should be set to 255 in the first line if I want it fully visible, right?

[Steinbitglis]

Yes, it's the equivalent of 0xff

[Ankish Jain]

if for above pulse animation i want to increase or decrease animation speed dynamically on some action , how do to ?? Been searchin a lot , dint get an answer.got a deadline soon ! thnx

[Ankish Jain]

How do you change the duration of the above fade to dynamically?