NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
@"Friend FB id", @"to",
@"Say Hello", @"message",
@"Your Descriptive message", @"description",
@"Your link", @"link",
@"Your photo link", @"picture",
@"Facebook app id",@"app_id"
@"feed",@"method"
nil];
Prepare Dictionary with These much Parameter and Then Call Method
[FBWebDialogs presentFeedDialogModallyWithSession:session//[FBSession activeSession]
parameters:params
handler:
^(FBWebDialogResult result, NSURL *resultURL, NSError *error){
}];
Make sure that Before calling this your facebook Session should be valid.