ios - how to post route map on facebook not image -

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facebook providing new feature post route map , not image of map. have checked documentation , found code getting

they have given kind of code 

nsmutabledictionary<fbgraphobject> *action = [fbgraphobject graphobject];action[@"course"] = @"http://samples.ogp.me/136756249803614";  [fbrequestconnection startforpostwithgraphpath:@"me/fitness.walks"                                    graphobject:action                              completionhandler:^(fbrequestconnection *connection,                                                  id result,                                                  nserror *error) {                                  // handle result                              }];

i have done this. can not ios need use php need send array of longitude , latitude php side , php side posting on map on facebook job on ios not know how @ php side


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