Display time taken to download image from url and display in customtablecell - ios

Question

Here is my code, please help. In the below I need to get the time taken to load image from url and display the time in custom tableview cell. Which we can use either NSTimer or NSDate.
Thanks in advance.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"CustomCell";
TableViewCell *cell = (TableViewCell *)[_tableViewUsername dequeueReusableCellWithIdentifier:CellIdentifier];
NSDate *object = arrURL[indexPath.row];
rowCount = indexPath.row;
cell.userName.text = [arrUserNames objectAtIndex:indexPath.row];
if ([object valueForKey:#"status"])
{
if([[object valueForKey:#"status"]isEqualToString:#"completed"] && [object valueForKey: #"image"] && [[object valueForKey: #"image"] isKindOfClass:[UIImage class]])
{
cell.customImageView.contentMode = UIViewContentModeScaleToFill;
cell.customImageView.image = [object valueForKey:#"image" ];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
}
else
{
[object setValue:#"inprogress" forKey:#"status"];
[self.operationQueue addOperationWithBlock:^
{
UIImage * image = [UIImage imageWithData:[NSData dataWithContentsOfURL:
[NSURL URLWithString:[object valueForKey:#"url"]]]];
[object setValue:image forKey:#"image"];
[object setValue:#"completed" forKey:#"status"];
//count set
[[NSOperationQueue mainQueue] addOperationWithBlock:^
{
[_tableViewUsername reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];
}];
}];
}
return cell;
}

Answer 1

You can use following code. But for this you have to use SDWebImageCache
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
CustomTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cellId"];
__block NSDate *startTime = [NSDate date];
[cell.nImageView sd_setImageWithURL:[NSURL URLWithString:[imageUrlArray objectAtIndex:indexPath.row]] completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
NSDate *endTime = [NSDate date];
NSTimeInterval secs = [endTime timeIntervalSinceDate:startTime];
NSLog(#"Seconds (%ld) --------> %f",(long)indexPath.row, secs);
}];
return cell;
}
To download SDWebImage Use this link

Answer 2

Define below method in your .m file
- (void)downloadImageFrom:(NSString *)strURL response:(void (^)(NSData *data))handler
{
strURL = [strURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
[NSURLConnection sendAsynchronousRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:strURL]] queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if (data)
{
handler(data);
}
}];
}
And call from cellForRowAtIndexpath
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"CustomCell";
TableViewCell *cell = (TableViewCell *)[_tableViewUsername dequeueReusableCellWithIdentifier:CellIdentifier];
NSDate *object = arrURL[indexPath.row];
rowCount = indexPath.row;
cell.userName.text = [arrUserNames objectAtIndex:indexPath.row];
cell.customImageView.contentMode = UIViewContentModeScaleToFill;
cell.accessoryType = UITableViewCellAccessoryCheckmark;
[self downloadImageFrom:[object valueForKey:#"url"] response:^(NSData *data) {
if (data)
{
cell.customImageView.image = [[UIImage alloc] initWithData:data];
}
}];
}