Write the image data to disk as it comes in instead of putting in a NSData, so
that you don't need to put it all in memory.
Use NSFileHandle:writeData.
On 2010-08-19, at 5:48 AM, SanthoshKumarGundu wrote:
> Hi all,
>
> I have modified my code to send asynchronous request using the below
>
> NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:
> [NSURLRequest
> requestWithURL:
> [NSURL
> URLWithString:strURL]] delegate:self];
>
> - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
> {
> [self.activeDownload appendData:data];
> }
> - (void)connectionDidFinishLoading:(NSURLConnection *)connection
> {
> // Set appIcon and clear temporary data/image
>
> UIImage *image = [[UIImage alloc] initWithData:self.activeDownload];
>
> if (image != nil)
> {
> self.appRecord.appIcon = image;
> }
> else
> {
> self.appRecord.appIcon = [UIImage
> imageNamed:@"image_not_available.png"];
> }
> [image release];
>
> // Release the connection now that it's finished
> self.imageConnection = nil;
>
> // call our delegate and tell it that our icon is ready for display
> [delegate appImageDidLoad:self.indexPathInTableView];
> [delegate appSingleImageDidLoad:rowNumber];
>
> self.activeDownload = nil;
>
> // show in the status bar that network activity is starting
> [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
> }
>
> In simulator I am able to run the application without any crashes.
>
> But in device it is taking long time to download the first image, and from
> second image the application is getting crashed.
>
> I have seen crash reports , and it is of type "low memory".
>
> Can any one suggest me how to handle this situation?
>
> Also, I have overridden "didReceiveMemoryWarning" and added an alertview,
> it is not getting called.
>
> Thanks in advance.
>
> Thanks,
> Santhosh Kumar Gundu
>
> On Aug 12, 2010, at 2:19 AM, David Duncan wrote:
>
>> 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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