Get a specific image from any URL like Facebook does - ios

Question

My Question might be looks like similar to other questions but really this is not.(according to my knowledge). i can't understand that how to fetch a specific image from any URL Like Facebook does, i can't show you screen shot because i don't have real device. but i can show you Skype's screen shot taken from MAC. any help will be appreciated. thanks.
EDIT:i got favicon using this link but it is very small i want that in bigger size.

Answer 1

finally, i got the answer. this might be helpful to you thats why i post this answer.use this macro#define FACEBOOK_GRAPH #"https://graph.facebook.com/v2.3/oauth/access_token?client_id=USE_YOUR_CLIENT_ID&client_secret=USE_YOUR_CLIENT_SECRET&grant_type=client_credentials"NOTE: you can get "client_id" and "client_secret" by registering your Application on developer.facebook.com now make a call for FACEBOOK_GRAPH Like bellow.
AFHTTPRequestOperationManager* manager = [AFHTTPRequestOperationManager manager];
//manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.responseSerializer=[AFJSONResponseSerializer new];
AFHTTPRequestOperation* operation = [manager POST:FACEBOOK_GRAPH parameters:nil
success:^(AFHTTPRequestOperation* op, id responseObject){
//here pass your URL as a string and access Token as a string, access token will found in responseObject
}
failure:^(AFHTTPRequestOperation* op, NSError* error){
NSLog(#"\n\nerror--->%#\n\n",error.localizedDescription);
}];
[operation start];
now the second method to get image from our URL, use our URL and access Token got from above method
url = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
token = [token stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
AFHTTPRequestOperationManager* manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer=[AFJSONResponseSerializer new];
AFHTTPRequestOperation* operation = [manager POST:[NSString stringWithFormat:#"https://graph.facebook.com/v2.3/?id=%#&access_token=%#&scrape=true",url,token] parameters:nil success:^(AFHTTPRequestOperation* op, id responseObject){
NSLog(#"\n\nData Response==\n%#\n",responseObject);
//you will get Image URL in response
}failure:^(AFHTTPRequestOperation* op, NSError* error){
NSLog(#"##error--->\n%#",error.localizedDescription);
}];
[operation start];