How can I change Sprite Image every half a second? - ios

Question

I have been trying to achieve this from this morning but haven't figured it out. I have a SKSpriteNode which is an Image that displays the name of my game on the main screen. What I am trying to achieve is to change those images every half a second. I have made multiple images of the name with different colors so I can change images every half a second.That will give the effect of the title changing colors like a typical arcade game. This is what I have done so far...
- (void)viewDidLoad
{
[super viewDidLoad];
_images = [NSArray arrayWithObjects:#"YellowLabel.png", #"BlueLabel.png", #"GreenLabel.png", #"RedLabel.png", #"WhiteLabel.png", nil];
NSTimer *myTimer = [NSTimer timerWithTimeInterval:0.5 target:self selector:#selector(doAnimation) userInfo:nil repeats:YES];
// Configure the view.
SKView * skView = (SKView *)self.view;
skView.showsFPS = YES;
skView.showsNodeCount = YES;
// Create and configure the scene.
SKScene * scene = [TitleScene sceneWithSize:skView.bounds.size];
scene.scaleMode = SKSceneScaleModeAspectFill;
SKSpriteNode *labelNode = [SKSpriteNode spriteNodeWithImageNamed:#"WhiteLabel.png"];
labelNode.position = CGPointMake(160, 400);
// Present the scene.
[skView presentScene:scene];
[self doAnimation];
[scene addChild:labelNode];
}
And I also have this additional method:
-(void)doAnimation {
SKSpriteNode *labelNode = [SKSpriteNode spriteNodeWithImageNamed:#"WhiteLabel.png"];
static int counter = 0;
if ([_images count] == counter+1) {
counter = 0;
}
labelNode = [SKSpriteNode spriteNodeWithImageNamed:[_images objectAtIndex:counter]];
}
Thanks for any help!

Answer 1

Here's one way you could do this with SKAction :
SKAction *actionWait = [SKAction waitForDuration:.5];
SKAction *actionBlock = [SKAction runBlock:^(void)
{
// do whatever you want to do every half second here
}];
SKAction *actionSequence = [SKAction sequence:#[actionWait, actionBlock]];
SKAction *actionRepeat = [SKAction repeatActionForever:actionSequence]
[self runAction:actionRepeat];
Another way, could be like this, since I think you are just animating textures :
// create an NSArray called anim that includes all your SKATextures
SKAction *actionAnimate = [SKAction animateWithTextures:anim timePerFrame:.5 resize:YES restore:NO];
SKAction *actionRepeat = [SKAction repeatActionForever:actionAnimate];
[self runAction:actionRepeat];