ios - Why I can't pass data using segue -

i have plist contains key , value... let say:

key: alpha_male_body_language value: alpha male body language key: building_attraction value: building attraction key: fifteen_lessons value: fifteen lessons key: how_can_it_have_gone_wrong value: how can have gone wrong 

here implementation of tableview:

#import "booktitleviewcontroller.h" #import "booklessonviewcontroller.h"  @interface booktitleviewcontroller ()  @end  @implementation booktitleviewcontroller{     nsdictionary *booktitles; }  @synthesize tableview; @synthesize booktitles;  - (void)viewdidload {     [super viewdidload];      self.booktitles = [nsdictionary dictionarywithcontentsoffile:[[nsbundle mainbundle] pathforresource:@"book" oftype:@"plist"]];  }  - (void)viewdidunload {     [super viewdidunload];     // release retained subviews of main view.      self.booktitles = nil; }  - (void)didreceivememorywarning {     [super didreceivememorywarning];     // dispose of resources can recreated. }  - (bool)shouldautorotatetointerfaceorientation:(uiinterfaceorientation)interfaceorientation {     return (interfaceorientation != uiinterfaceorientationportraitupsidedown); }  - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {     return [self.booktitles count]; }  - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     static nsstring *simpletableidentifier = @"recipecell";      uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:simpletableidentifier];      if (cell == nil) {         cell = [[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:simpletableidentifier];     }      nsstring *value = [[self.booktitles allvalues] objectatindex:indexpath.row];      //cell.textlabel.text = [recipes objectatindex:indexpath.row];     cell.textlabel.text = value;      return cell; }  - (void)prepareforsegue:(uistoryboardsegue *)segue sender:(id)sender {     if ([segue.identifier isequaltostring:@"showbooklesson"]) {         nsindexpath *indexpath = [self.tableview indexpathforselectedrow];         booklessonviewcontroller *destviewcontroller = segue.destinationviewcontroller;          destviewcontroller.booktitlekey = [[self.booktitles allkeys] objectatindex:indexpath.row];         destviewcontroller.booktitlevalue = [[self.booktitles allvalues] objectatindex:indexpath.row];          //destviewcontroller.recipename = [recipes objectatindex:indexpath.row];     } }  @end 

i have 2 problems using code above:

1. the list not shown in order after reading plist. example, title "how can have gone wrong" shown on first list, knowing fact listed on 4th.

2. i exception saying:

   -[uinavigationcontroller setbooktitlevalue:]: unrecognized selector sent instance 0x894c230

this referring line:

 destviewcontroller.booktitlekey = [[self.booktitles allkeys]     objectatindex:indexpath.row];  destviewcontroller.booktitlevalue = [[self.booktitles allvalues] objectatindex:indexpath.row]; 

(inside prepareforsegue function).

please helps me solve problem. thank , appreciate it!

more detail on possible solution problem 2:

1. add uistoryboardsegue+mmnavigationcontroller.h project, found in this github repo
2. import header file in view controller's implementation file
3. change 1 line in implementation of prepareforsegue:sender: so:

booklessonviewcontroller *destviewcontroller = segue.topleveldestinationviewcontroller; 

explanation: if storyboard segue points points destination view controller wrapped in uinavigationcontroller, segue's destinationviewcontroller value navigation controller object. code referenced here handle checking whether destinationviewcontroller instance of uinavigationcontroller class, , if so, return topviewcontroller instead. implemented on uistoryboardsegue class; categories way add methods or properties existing class extend functionality without needing use inheritance, etc.