ios6 - How to use OpenURL to pass in a URL and then performSegue while retaining the URL? -

i trying open file (csv) e-mail app, parse , import data (students) course. have parsed , imported data via file in itunes , dropbox, struggling on getting file passed in e-mail.

specifically, flow looks this: open e-mail > select file open app > app launches , reads file first view controller ... here stuck:

i modal view popup user can select course want imported data (students) go into.

the app delegate tells first view controller handle url:

// first view controller -(void) handleopenurl:(nsurl *)url {     _importedfileurl=url; // if nslog this, can see file makes in      [self performseguewithidentifier:@"select course import" sender:self]; // ***fail ***// } 

the storyboard wired correctly, because if use nsnotification can modal view appear (but lose value url). seems though view hasn't gotten chance appear , therefore can't handle segue.

any suggestions on how can modal view appear , retain _importedfileurl?

solved: using nsnotification center, suspected :d

in appdelegate(.m) added following routine within openurl

- (bool)application:(uiapplication *)application openurl:(nsurl *)url sourceapplication:(nsstring *)sourceapplication annotation:(id)annotation {   ... other code handle dropbox imported urls    // check see if file has been sent on via app, e-mail   if (url != nil && [url isfileurl])       {         mainviewcontroller  *firstviewcontroller = [[mainviewcontroller alloc]init];         [firstviewcontroller handleopenurl:url];         nsurl *filefromemail=url;         // add url dictionary item, can open nsnotificationcenter         nsdictionary *fileinfo=[nsdictionary dictionarywithobject:filefromemail forkey:@"filefromemail"];         // add notification named "seguelistener" , pass on dictionary object         [[nsnotificationcenter defaultcenter] postnotificationname:@"seguelistener" object:nil userinfo:fileinfo];          return yes;     } } 

and in mainviewcontroller(.m) in viewdidload, added added nsnotification observer:

- (void)viewdidload {         [super viewdidload];     ...      // if notification named "seguelistener" sent out, perform method: seguetoimportfile     [[nsnotificationcenter defaultcenter] addobserver:self selector:@selector(seguetoimportfile:) name:@"seguelistener" object:nil]; } 

and added handleopenurl method:

-(void) handleopenurl:(nsurl *)url {    // capture url , store _importedfileurl (nsurl)     _importedfileurl=url; } 

and seguetoimportfile method:

-(void)seguetoimportfile:(nsnotification *)notification {     nsdictionary *file=[notification userinfo]; // dictionary object userinfo     _importedfileurl=[file objectforkey:@"filefromemail"];      [self performseguewithidentifier:@"select course import" sender:self]; } 

and segue send on _importedfileurl new tableviewcontroller lists courses:

-(void)prepareforsegue:(uistoryboardsegue *)segue sender:(id)sender {     uinavigationcontroller *navigationcontroller=segue.destinationviewcontroller;     selectcoursetableviewcontroller *selectcoursetableviewcontroller=[[navigationcontroller viewcontrollers]objectatindex:0];     selectcoursetableviewcontroller.seguefrom=@"email import"; // storyboard     selectcoursetableviewcontroller.importedfile = _importedfileurl; }