NSMutableData disappearing - ios

Question

in my Program, I have a NSMutableData variable that collect the information from http://www.nhara.org/scored_races-2013.htm. After about the third time it gets information from a website, when it contains 90810 bytes, it either disappears or becomes null because if I print it a NSString, it is null. Here is the code
- (void)viewWillAppear:(BOOL)animated
{
// Create a new data container for the stuff that comes back from the service
xmlData = [[NSMutableData alloc] initWithCapacity:180000];
[self fetchEntries];
[super viewWillAppear:animated];
}
- (void)fetchEntries
{
// Construct a URL that will ask the service for what you want
NSURL *url = [NSURL URLWithString: #"http://www.nhara.org/scored_races-2013.htm"];//
// Put that URL into an NSURLRequest
NSURLRequest *req = [NSURLRequest requestWithURL:url];
// Create a connection that will exchange this request for data from the URL
connection = [[NSURLConnection alloc] initWithRequest:req delegate:self startImmediately:YES];
}
- (void)connection:(NSURLConnection *)conn didReceiveData:(NSData *)data
{
// Add the incoming chunk of data to the container we are keeping
// The data always comes in the correct order
[xmlData appendData:data];
NSLog(#"%#",xmlData);
NSString *xmlCheck = [[[NSString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding]autorelease];
NSLog(#"xmlCheck = %#", xmlCheck);
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"error= %#",error);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)conn {
// We are just checking to make sure we are getting the XML
NSString *xmlCheck = [[[NSString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding] autorelease];
NSLog(#"xmlCheck2 = %#", xmlCheck);
}
What confuses me the most is that my NSMutableData stores data, but then loses it while claiming to have the same number of bytes.
Is there a constraint to the NSMutableData's size or is my problem just memory management?

Answer 1

You need to create a property for your xmlData variable. In your header file after your
#interface MyClass, make one like so
#property (nonatomic, retain) NSMutableData * xmlData;
If you are using ARC you leave it as strong if you using below ARC you change strong to retain. When you want to use your variable you do self.xmlData