iPhone image width limit?

[Stefan]

Is there a limitation for images that can be loaded in xCode? I'm loading an image to an active image with following dimensions: 4000x100, PNG, 10kb (background image) but it shows up as black box instead.

If I crop the size of the image to 1500x100 it shows up correctly. Is there a workaround for this behavior?

[iamjot]

I think i have posted this in another thread before. I am using a 2048 x 2048 picture and it works. I never tried it with bigger pictures (but i dont think it will work). Devide your 4000 picture (i guess a sky background or something) to 4 smaller parts and it should work. And (it´s been said here a lot of times so i guess it´s pretty important) always mind the x2 dimensions. 8 / 16 /.... 128 / 256 / 512 / 1024 -> to optimize your game / app on the iphone.

[Yos]

If you reduce the pic colors to 32k it might help (I assume that it is currently 24bit). Better do it with Photoshop or alike, and use error diffusion. You will hardly see any quality reduction.

[AyreGuitar]

Stefan - a black box suggests its a memory problem. Does your PNG have transparency? Try removing that as it eats memory. Another option is to store it at 1000x50 and scale it up by x2. Not sure size limit is in pixels for iOS, but do know that there's some code that will resize the image if both width and height are >2048

[Stefan]

Thanks for all your suggestions. I use Photoshop for all my images.

I'll try to split my images into 4 slices having a widrh of 1024 but its a bit tricky since the images have associated active objects to foster collision detection. I'll investigate this issue a bit further and let you know what the real reason for this behavior is.