On Aug 11, 2010, at 12:46 AM, SanthoshKumarGundu wrote:

> Can any one  have an idea of  what is the maximum  image limit(size and 
> resolution) in iphone?.
> 
> There are some images in web server. In my application , I am  getting  these 
> as NSData (one image at a time)  and displaying the image  using the 
> following code
> 
> NSData *imageData = [[NSData alloc]initWithContentsOfURL:[NSURL 
> URLWithString:imageURLString]];
> UIImage *sampleImage = [UIImage imageWithData:imageData];
> 
> This is working fine for small images ( upto  1MB of size and resolution of 
> 1024*1024).
> 
> But for large images ( 3MB size and resolution of 2500*2500), the application 
> is getting crashed.


What kind of crash are you getting? I would bet that the exception code is 
0x8badf00d (see TN2151 for information on what that means and how to read crash 
reports).

You are actually pretty lucky that the first version works at all, and I bet 
that if you are on a slow or broken network that it won't work and you will get 
a similar crash.

Generally any using -initWithContentsOfURL: for remote URLs will fail if you 
are trying to do so on the main thread (and if you are using UIKit, you are 
probably trying to do so on the main thread, like the above code).

The correct solution here is to use asynchronous networking to download the 
data and once you finish the download you can create a UIImage from the 
gathered data. Using synchronous networking (like you are above) is generally 
discouraged.
--
David Duncan

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