AFNetworking async download GIF with placeholder - ios

Question

I've been using AFNetworking for downloading UIImage async with placeholder, it works fine with JPEG and PNG, however I'm using a library for my GIF pictures. It works well when I'm doing it in sync. However I would like to use AFNetworking to download the image in async while showing a placeholder image in the ImageView. How can I do that? Thanks!
Here are my codes:
- (void) downloadAllImagesForComment
{
if (_imageLinkList.count > 0)
{
if (images == nil)
images = [[NSMutableDictionary alloc] init];
for (NSDictionary *URL in _imageLinkList) {
if ([images objectForKey:[URL objectForKey:#"link"]] == nil)
{
/*
* imageType = 0 <= other
* imageType = 1 <= gif
*/
int imageType = 0;
NSURL *url = [NSURL URLWithString:[URL objectForKey:#"link"]];
NSError *error = [[NSError alloc] init];
NSLog(#"Retrieving imageData...");
NSData *imageData = [NSData dataWithContentsOfURL:url options:NSDataReadingMappedIfSafe error:&error];
NSLog(#"Retrived imageData.");
uint8_t c;
[imageData getBytes:&c length:1];
switch (c) {
case 0xFF:
NSLog(#"image/jpeg");
imageType = 0;
break;
case 0x89:
NSLog(#"image/png");
imageType = 0;
break;
case 0x47:
NSLog(#"image/gif");
imageType = 1;
break;
case 0x49:
imageType = 0;
break;
case 0x4D:
NSLog(#"image/tiff");
imageType = 0;
break;
}
UIImageView *temp_imageView;
if (imageType == 1)
{
// GIF IMAGE SHOULD BE INITIALIZED HERE!!!!!!
// image = [UIImage animatedImageWithAnimatedGIFData:imageData];
}
else
{
temp_imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 280, 250)];
[temp_imageView setImageWithURL:url placeholderImage:[UIImage imageNamed:#"patch_la"]];
}
[images setValue:temp_imageView forKey:[URL objectForKey:#"link"]];
NSLog(#"Done downloading image: %#", [URL objectForKey:#"link"]);
}
}
}
}

Answer 1

I'd recommend using the SDWebImage library. It has async animated Gif support built in.
After including the library, it's simple (just have the NSURL point to the remote Gif):
[imageView setImageWithURL:[NSURL] completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType){}];