Asynchronus way of image in for loop [closed]

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Closed 6 years ago.

I have an for loop , which consists of uiimageview inside it, everytime i add the image from the array which consits of url , i convert it to data and imagewithdata method am using it, it works for me perfectly but it takes long time , can we acheive it in lazy loading which is used in uitableview?

Pls help

Thanks in advance

回答1:

Instead of Lazzy Loading I used following way in UItableView and its working for me without scrolling issue .

 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^(void) {

            NSData *imageData ;

            imageData = [UICommonUtils imageDataFromString:profile.Photo];

            dispatch_sync(dispatch_get_main_queue(), ^(void) {


                    if([imageData length] > 1)
                    {
                        //UIImageView* imageView = (UIImageView*)[cell viewWithTag:100];
                        cell.ProfileImage.image = [UIImage imageWithData:imageData];
                    }
                    else
                    {
                        cell.ProfileImage.image = [UIImage imageNamed:kDefaultProfileImage];
                    }

                });

            imageData = nil;
        });

来源：https://stackoverflow.com/questions/18510909/asynchronus-way-of-image-in-for-loop