png images in memory.??

[AmitSrivastava]

hi everyone,
am facing a problem, in my game i am using 80-90 png images of different size. The problem is that game is slow and unplayable, is there any difference if I crush png images and then use with "imageNamed:" ...... before I used "imageWithContentsofFile" .... but it had taken lots of time to load...

Is there any way to solve this prob

Thanx in advance ..

[smasher]

Originally Posted by AmitSrivastava

hi everyone,
am facing a problem, in my game i am using 80-90 png images of different size. The problem is that game is slow and unplayable, is there any difference if I crush png images and then use with "imageNamed:" ...... before I used "imageWithContentsofFile" .... but it had taken lots of time to load...

Is there any way to solve this prob

Thanx in advance ..

Were you calling "imageWithContentsofFile" every frame? You probably need to load your images into an array at startup, and then reference them each frame without recreating them.

"imageNamed" is faster when you recreate the same image over and over, but you should not need to recreate them over and over; also imageNamed uses more memory (to cache the images.)

Also, how big are the images? If they are full-screen you'll probably only get about 20 images loaded at once before you run out of memory.

[AmitSrivastava]

Originally Posted by smasher

Were you calling "imageWithContentsofFile" every frame? You probably need to load your images into an array at startup, and then reference them each frame without recreating them.

"imageNamed" is faster when you recreate the same image over and over, but you should not need to recreate them over and over; also imageNamed uses more memory (to cache the images.)

Also, how big are the images? If they are full-screen you'll probably only get about 20 images loaded at once before you run out of memory.

Thanks for reply,
i am not recreating the images, i have stored in a NSMutable Array and using index of that Array,

- (void) initImages{
       XImg = [UIImage imageNamed:@"X.png"];
	[Xmages  addObject:XImg ];	
// 33 times	
}

- (void) XImage{		
	Ximageview.image = [Xmages objectAtIndex:XImageCount];
	
	XImageCount++;
	if(XImageCount>=33){
		XImageCount=0;	
	}
}

above all 33 image covers 70% of iPhone screen.

if i compress the png file, will it create any dfference?

[smasher]

Originally Posted by AmitSrivastava

above all 33 image covers 70% of iPhone screen.

if i compress the png file, will it create any dfference?

Good, you are not recreating the images. I do not think compressing the images will affect the speed.

You could try Ximageview.animationImages = Xmages ; that may run smoother than setting the image by hand.