IOS 8 using the system to bring your own navigation

  viewcontroller.m//  app Self-guided////  created by wup on 15/ 5/23.//  copyright  (c)  2015 year  apple. all rights reserved.//#import   "ViewController.h" #import  <MapKit/MapKit.h> @interface  ViewController  () @property   (Nonatomic,strong)   CLGeocoder *geo; @end @implementation viewcontroller-  (void) Viewdidload {    [super viewdidload];    // do any  additional setup after loading the view, typically from a  nib.//    cllocationmanager *clmgr = [[cllocationmanager alloc]  init];//    [clmgr requestalwaysauthorization];    //     mkmapview *mv = [[mkmapview alloc] initwithframe:self.view.bounds];//     [self.view addsubview:mv];    [self.geo  geocodeaddressstring:@ "Lijiang"   completionhandler:^ (Nsarray *placemarks, nserror *error)  {                               //get to the beginning of the mkplacemark                 mkplacemark *startplace = [[mkplacemark alloc]  initWithPlacemark:[placemarks firstObject]];                 //waiting to get to the beginning of the placemarks after getting the end of the Placemarks,block callback delay problem          [self.geo  geocodeaddressstring:@ "Beijing"  completionhandler:^ (NSArray  *placemarks, nserror *error)  {                         /**                the mkplacemark,mkplacemark  that gets to the end point is the subclass of Clplacemark.              */             mkplacemark *endplace = [[mkplacemark alloc]  initWithPlacemark:[placemarks firstObject]];                         /**               convert Mkplacemark to Mkmapitem so that it can be put into the item array               */             mkmapitem *startitem = [[mkmapitem alloc  ] initWithPlacemark:startPlace];            mkmapitem *enditem = [[ mkmapitem alloc ] initwithplacemark:endplace];                         nsarray * item = @[startitem ,enditem];                         //setting the parameters of the dictionary store navigation              nsmutabledictionary *md = [ nsmutabledictionary dictionary];             md[mklaunchoptionsdirectionsmodekey] = mklaunchoptionsdirectionsmodedriving;             md[MKLaunchOptionsMapTypeKey] = [NSNumber  Numberwithinteger:mkmaptypehybrid];                                                               /**              * calls the app with its own navigation, it needs to pass in an array and a dictionary, and put the mkmapitem,         in the array.       dictionary to put the corresponding key value                             mklaunchoptionsdirectionsmodekey    Open Navigation mode               MKLaunchOptionsMapTypeKey   Map Mode                                                    mkmaptypestandard  = 0,                                                    mkmaptypesatellite,                                                    mkmaptypehybrid                           //  Navigation mode               mklaunchoptionsdirectionsmodedriving  Drive;              MKLaunchOptionsDirectionsModeWalking  Walking;              */#warning   In fact, all the code is for the following sentence, open the system comes with a gold map and perform certain actions, The parameters inside the launchoptions specify which actions to do             [mkmapitem  openMapsWithItems:item launchOptions:md];        }];  &NBSP;&NBSP;&NBSP;}];&NBSP,} #pragma  mark -  Super lazy load-(clgeocoder *) geo{     if  (!_geo)     {        _geo =  [[CLGeocoder alloc] init];             }    return  _geo;} @end

IOS 8 using the system to bring your own navigation