What leak in following lines ?

Discussion in 'iPhone/iPad Programming' started by sujithkrishnan, Jul 15, 2008.

  1. macrumors 6502

    May 9, 2008

    I am attaching the screenshot of the INSTRUMENTS mem-leak stach trace.
    When i go to the line mentioned in INSTRUMENTS, i found leak is in the following lines....

    INSTRUMENTS Showing REALLOC in this line... ( I am calling this line many times in file, but i am not using any explicit alloc for any of variable)
    This line is in a method and method returns me the NSData it recieved from URL, when i pass the URL to it...
    -(NSData *)httpConnectionHandler:(NSString *)URL  xmlString:(NSMutableString *)xmlDataInStringForm
    	NSString *URLString = [NSString stringWithFormat:@"http://stage.digby.com/30ss/%@?%@",URL,xmlDataInStringForm];
    	URLString = [URLString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];	
    	NSMutableURLRequest *orderRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:URLString]];
    	[orderRequest addValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    	[orderRequest setHTTPMethod:@"GET"];
    	NSURLResponse *orderResponse=nil;
    	NSError *orderResponseError=nil;
    	[COLOR="Red"]NSData *recievedOrderData = [NSURLConnection sendSynchronousRequest:orderRequest returningResponse:&orderResponse error:&orderResponseError];[/COLOR]
    	return recievedOrderData;
    Another leak is showing in this line
    // praserObject is a property...
    [COLOR="Red"]parserObject = [[NSXMLParser alloc] initWithData:receivedData1];
    (I think in following line, the previous string is losing its reference, when we oveerwrite with new string...)
    URLString = [URLString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];	
    But what wrong woth following?????????
    Instruments showing
    BOOL success = [NSKeyedArchiver archiveRootObject:[CustomerInfo getCustomerObject] toFile:writableDBPath];
    if([[itemObject.iImg substringToIndex:4] isEqualToString:@"http"])
    		 //NSAutoreleasePool *poolObj = [[NSAutoreleasePool alloc]init];
    		 [COLOR="Red"]NSURL *urlString = [[NSURL alloc]initWithString:itemObject.imgName];[/COLOR]
    		 NSData *data  = [[NSData alloc]initWithContentsOfURL:urlString];
    		 UIImage *img = [[UIImage alloc]initWithData:data];
    		 cell.image = img; 
    		 [img release];
    		 [data release];
    		 [urlString release];     //[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:itemObject.iImg]]];
    		 //[poolObj drain];
    		 cell.image = [UIImage imageNamed:itemObject.iImg];
    	     state = 1;
    	return cell;

    Attached Files:

  2. macrumors regular

    Nov 20, 2008
    Remote and Local Server

    Hi all,

    May I know what is the server you are using , Remote server or local server.
    I found a strange behaviours for the http connection using NSURL.

    a) When I am using the remote server,
    I am not getting any memory leak.
    b) When I am using the local server
    i) with IP Address in the url, I am didnt got any memory leak.
    ii) with Domain name(eg: http://somelocalserver/test1.xml) I am getting the memory leaks.

    So If u find any issue related to this or any solution for the part b. or reasons for this behaviour please reply.

    Thank u.

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