Wait for FB request before UITableView loads - ios

Question

I am trying to use Facebook's iOS SDK and load a list of friends in a UITableView. When I put the following code in viewDidLoad it seemingly doesn't get added to the UITableView. (Where users is the NSMutableArray)
FBRequest* friendsRequest = [FBRequest requestForMyFriends];
[friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection,
NSDictionary* result,
NSError *error) {
NSArray* friends = [result objectForKey:#"data"];
NSLog(#"Found: %i friends", friends.count);
for (NSDictionary<FBGraphUser>* friend in friends) {
NSLog(#"I have a friend named %# with id %#", friend.name, friend.id);
[users addObject:friend.name];
}
}];
I've tried adding:
[friendsTableView beginUpdates];
[friendsTableView insertRowsAtIndexPaths:users withRowAnimation:UITableViewRowAnimationRight];
[friendsTableView endUpdates];
To update the UITableView after the request finishes with no change.
What can I do either load the UITableView after the request or update the UITableView when the request finishes?

Answer 1

you cannot just pass any array to insertRowsAtIndexPaths:withRowAnimation:. It expects an array filled with index paths — hence the name.
what you want is to reload the tableview once the response is received.
FBRequest* friendsRequest = [FBRequest requestForMyFriends];
[friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection,
NSDictionary* result,
NSError *error) {
NSArray* friends = [result objectForKey:#"data"];
NSLog(#"Found: %i friends", friends.count);
for (NSDictionary<FBGraphUser>* friend in friends) {
NSLog(#"I have a friend named %# with id %#", friend.name, friend.id);
[users addObject:friend.name];
}
[friendsTableView reloadData]; //<------
}];
while tableviews datasource & delegate methods use users as source.