Application shows low memory warning and crashes while loading images?
- by Bhoomi
I am using following code for loading images from server using following code.When i scroll UITableView application crashes.
AsynchrohousImageView class .m file
- (void)dealloc {
[connection cancel]; //in case the URL is still downloading
[connection release];
[data release];
[_imageView release];
[_activityIndicator release];
[super dealloc];
}
- (void)loadImageFromURL:(NSURL*)url
defaultImageName:(NSString *)defaultImageName
showDefaultImage:(BOOL)defaultImageIsShown
showActivityIndicator:(BOOL)activityIndicatorIsShown
activityIndicatorRect:(CGRect)activityIndicatorRect
activityIndicatorStyle:(UIActivityIndicatorViewStyle)activityIndicatorStyle {
if (connection!=nil) { [connection release]; } if (data!=nil) { [data release]; }
if ([[self subviews] count]>0) {
[[[self subviews] objectAtIndex:0] removeFromSuperview]; // }
if (defaultImageIsShown) {
self.imageView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:defaultImageName]] autorelease];
} else {
self.imageView = [[[UIImageView alloc] init] autorelease];
}
[self addSubview:_imageView];
_imageView.frame = self.bounds;
[_imageView setNeedsLayout];
[self setNeedsLayout];
if (activityIndicatorIsShown) {
self.activityIndicator = [[[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:activityIndicatorStyle] autorelease];
[self addSubview:_activityIndicator];
_activityIndicator.frame = activityIndicatorRect;
_activityIndicator.center = CGPointMake(_imageView.frame.size.width/2, _imageView.frame.size.height/2);
[_activityIndicator setHidesWhenStopped:YES];
[_activityIndicator startAnimating];
}
NSURLRequest* request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)theConnection didReceiveData:(NSData *)incrementalData {
if (data==nil) { data = [[NSMutableData alloc] initWithCapacity:2048]; }
[data appendData:incrementalData];
}
- (void)connectionDidFinishLoading:(NSURLConnection*)theConnection {
[connection release];
connection=nil;
_imageView.image = [UIImage imageWithData:data];
if (_activityIndicator) {
[_activityIndicator stopAnimating];
}
[data release]; data=nil;
}
- (UIImage*) image {
UIImageView* iv = [[self subviews] objectAtIndex:0];
return [iv image];
}
In ViewController Class Which loads image
- (UITableViewCell *)tableView:(UITableView *)tV cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *reuseIdentifier =@"CellIdentifier";
ListCell *cell = (ListCell *)[tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
if (cell==nil) {
cell = [[ListCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier];
NSMutableDictionary *dicResult = [arrResults objectAtIndex:indexPath.row];
NSURL *url=[NSURL URLWithString:[dicResult objectForKey:@"Image"]];
AsynchronousImageView *asyncImageView = [[AsynchronousImageView alloc] initWithFrame:CGRectMake(5, 10,80,80)];
[asyncImageView loadImageFromURL:url
defaultImageName:@"DefaultImage.png"
showDefaultImage:NO
showActivityIndicator:YES
activityIndicatorRect:CGRectMake(5, 10,30,30)
activityIndicatorStyle:UIActivityIndicatorViewStyleGray]; // load our image with URL asynchronously
[cell.contentView addSubview:asyncImageView];
// cell.imgLocationView.image = [UIImage imageNamed:[dicResult valueForKey:@"Image"]];
[asyncImageView release];
}
if([arrResults count]==1)
{
UITableViewCell *cell1=[tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
if(cell1==nil)
cell1=[[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier] autorelease];
NSMutableDictionary *dicResult = [arrResults objectAtIndex:0];
cell1.textLabel.text=[dicResult valueForKey:@"NoResults"];
return cell1;
}
else
{
NSMutableDictionary *dicResult = [arrResults objectAtIndex:indexPath.row];
NSString *title = [NSString stringWithFormat:@"%@ Bedrooms-%@", [dicResult valueForKey:KEY_NUMBER_OF_BEDROOMS],[dicResult valueForKey:KEY_PROPERTY_TYPE]];
NSString *strAddress = [dicResult valueForKey:KEY_DISPLAY_NAME];
NSString *address = [strAddress stringByReplacingOccurrencesOfString:@", " withString:@"\n"];
NSString *price = [dicResult valueForKey:KEY_PRICE];
NSString *distance = [dicResult valueForKey:KEY_DISTANCE];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.lblTitle.text = title;
cell.lblAddress.text = address;
if ([price length]>0) {
cell.lblPrice.text = [NSString stringWithFormat:@"£%@",price];
}else{
cell.lblPrice.text = @"";
}
if ([distance length]>0) {
cell.lblmiles.text = [NSString stringWithFormat:@"%.2f miles",[distance floatValue]];
}else{
cell.lblmiles.text = @"";
}
}
return cell;
}
How can i resolve this?
I have attached heapshot analysis screen shot of it.Here non Object consumes so much of memory what is that?
