display animation but get black square?

[jetwilson]

Hi, Once again another problem has reared its ugly head! I created a basic animation using a UIImageView and wanted to expand on that by making the code more reusable as I want multiples of that animation displayed on the screen

My idea was to create a UIView class called explosionView.m and .h and write the UIImageView animation code there.

This is the init code within the explosionView.m UIView object file:

- (id)init {
	UIImage *image = [UIImage imageNamed:@"RGB0001.png"];
	CGRect frame = CGRectMake(0, 0, image.size.width, image.size.height);
	aExplosionView = [[UIImageView alloc] initWithFrame:frame];
	[image release];
	
	self.opaque = NO;
	aExplosionView.animationImages = [NSArray arrayWithObjects:
				[UIImage imageNamed:@"RGB0001.png"],
				[UIImage imageNamed:@"RGB0002.png"],
				[UIImage imageNamed:@"RGB0003.png"],
				[UIImage imageNamed:@"RGB0004.png"],
				[UIImage imageNamed:@"RGB0005.png"],
				[UIImage imageNamed:@"RGB0006.png"],
				[UIImage imageNamed:@"RGB0007.png"],
				[UIImage imageNamed:@"RGB0008.png"],
				[UIImage imageNamed:@"RGB0009.png"],
				[UIImage imageNamed:@"RGB0010.png"],
				[UIImage imageNamed:@"RGB0011.png"],
				[UIImage imageNamed:@"RGB0012.png"],
				[UIImage imageNamed:@"RGB0013.png"],
				[UIImage imageNamed:@"RGB0014.png"],
				[UIImage imageNamed:@"RGB0015.png"],
				nil];
		
	aExplosionView.animationRepeatCount = 1;
	aExplosionView.animationDuration = 1;
	aExplosionView.center = CGPointMake(0, 0);
	[aExplosionView startAnimating];
	
	return self;
}

and in my mainViewController.m I do this to create an instance of the explosionView class in viewDidLoad:

UIImage *image = [UIImage imageNamed:@"RGB0001.png"];
CGRect frame = CGRectMake(0, 0, image.size.width, image.size.height);
explosionView *explo = [[explosionView alloc] initWithFrame:frame];
[image release];
explo.center = CGPointMake(100, 100);
[self.view addSubview:explo];

I have done this before with UIImages for non-animation images - but when I tried with this animating UIImageView, a black square where my animation should be displayed is displayed. No crash, no nothing. Just a black square. Not terribly useful!

Anyone know what's happening?

Thanks

Jetwilson

[kelvinkao]

Try taking out the explo.center = CGPointMake(100, 100); line.

[jetwilson]

Originally Posted by kelvinkao

Try taking out the explo.center = CGPointMake(100, 100); line.

That makes no differance. The black square just appears at 0, 0.

I don't completely understand why that would have worked anyway.

[finefin]

I have the same problem:

myUIImageView.animationImages
doesnt work in instances of an UIView.

did you (anyone?) come up with a solution?


EDIT:

Really strange. I believe I'm missing something fundamental here...
When I use an UIView the "normal" way, the animation works fine and the animation array is filled correctly:

   
    // after creating an myAnimationImages-array
	myUIImageView.animationImages = myAnimationImages;
	NSLog(@"animation: %@", myUIImageView.animationImages);

/* output:

animation: (
    <UIImage: 0xd3ccc0>,
    <UIImage: 0xd39820>,
    <UIImage: 0xd3b530>,
    <UIImage: 0xd398d0>,
)

When I do the same in my UIView-Instance the output is:

animation: (null)

any help is appreciated.


EDIT II:

oh. and I may add, that setImage using the same array of images works perfectly fine:

[myUIImageView setImage:[UIImage imageWithContentsOfFile:[myAnimationImages objectAtIndex: 1]]];

EDIT III:

okay. i'm using a NSTimer to shoot off a sequence of "setImage" now.