Sparrow Forum

1. 

   bontakun
   Member

   Hi,

   First off,I have been using Sparrow Framework for a couple of weeks now and I have to say it is really easy to use with solid tutorials and documentation, so kudos to Sparrow Framework!

   I am at a pinch at the moment and I was hoping someone could help me out here.

   Basically, I have a class called Creatures and is of type SPMovieClip. I have set up a SPTween on the class itself in Creatures on a custom SPJuggler just like in the tutorial. What I am trying to do is to have the Creatures in a movie as well as move at the same time (SPMovieClip + SPTween). I manage to make it move but am failing at the SPMovieClip bit. Here's the code for my tween:

   Creatures.h

   @interface Creatures: SPMovieClip
   {
       SPJuggler *mJuggler;
   }
    
   Creatures.m
   - (void)startTween
   {
       SPTween *tween = [SPTween tweenWithTarget:self time:(double)((arc4random() % 3) + 1)
                                      transition:SP_TRANSITION_LINEAR];
       [tween addEventListener:@selector(onTweenCompleted:) atObject:self
                       forType:SP_EVENT_TYPE_TWEEN_COMPLETED];
    
       [tween animateProperty:@"x" targetValue:arc4random() % (int)([UIScreen mainScreen].bounds.size.height - (self.width/2))];
       [tween animateProperty:@"y" targetValue:arc4random() % (int)([UIScreen mainScreen].bounds.size.width - (self.height/2))];
    
       [mJuggler addObject:tween];
   }

   As you can see, mJuggler is my custom juggler which is being called using advanceTime in my scenes. Everything is working well and I got my Creatures class to move about in a linear fashion.

   However, I am having a lot of trouble trying to add a Movie into my Creature class. I did the following in my Creature class:

   Creatures.m

   NSArray *frames = [atlas texturesStartingWith:@"Alien"];
       [self initWithFrames:frames fps:3];
       self.x = -self.width/2;
       self.y = -self.height/2;

   This adds the texture to my Creature and since I have already got my tween to work, all I need to do is to add it into my custom SPJuggler. Problem is, it is not liking it and doing
   

   [mJuggler addObject:self]

   gives EXC_BAD_ACCESS on advanceTime in SPJuggler. How should I go about adding SPMovieClip in a SPMovieClip class (sounds ridiculous) using custom SPJuggler? I have been on this for a whole day so any help is very much appreciated..

   Thank you.

   Posted 4 months ago #
2. 

   enbr
   Moderator

   You are probably forgetting to create your SPJuggler like this.

   // Creatures.m
   - (id)init {
       if ((self = [super init])) {
           mJuggler = [[SPJuggler alloc] init];
       }
       return self;
   }
    
   - (void)dealloc {
       [mJuggler release];
       [super dealloc];
   }

   Also, I noticed that you are adding self to a juggler in self. I wouldn't recommend this style, but if you are doing this, you need to make self conform to the SPAnimatable protocol.

   // Creatures.h
   @interface Creatures: SPMovieClip <SPAnimatable>
   {
       SPJuggler *mJuggler;
   }
    
   // Creatures.m
   - (void)advanceTime {
       [mJuggler advanceTime];
   }

   Hope that helps,
   Brian

   Posted 4 months ago #
3. 

   bontakun
   Member

   Thanks Brian but that didn't seem to do the trick.

   I am also aware that it doesn't look right at all to conform self in a juggler in self but I would like to have a custom juggler for my SPMovieClip. What would be the best approach in this situation?

   Posted 4 months ago #
4. 

   bontakun
   Member

   Solved it! I just change my class to SPSPrite and put SPMovieClip instance variables then add them to my juggler. Doing so allows me to control them in a custom juggler, just like SPTween!

   Posted 4 months ago #

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