ios - Why are my custom annotation images changing? -

i have 21 different images using custom annotations on map. when load map initially, perfect. when navigate off of area , in seems images change. annotation pins no longer correspond correct image (however title , subtitle still correct when press on annotation). images mixed up. way entering test information nsuserdefaults , using test functionality of displaying custom annotations on map. assuming has reusability of annotation views cannot code right.

mapviewcontroller.h

#import "viewcontroller.h" #import <mapkit/mapkit.h>  @interface mapviewcontroller : viewcontroller<mkmapviewdelegate> {     nsuserdefaults *defaults;     nsmutablearray *reportedsightings; }  @property (strong, nonatomic) iboutlet mkmapview *mapview;  @end 

mapviewcontroller.m

#import "mapviewcontroller.h" @import corelocation;  @interface mapviewcontroller ()<cllocationmanagerdelegate>  @property (strong, nonatomic) cllocationmanager *locationmanager;  @end  @implementation mapviewcontroller  - (void)viewdidload {     [super viewdidload];      defaults = [nsuserdefaults standarduserdefaults];     reportedsightings = [[nsmutablearray alloc] init];       [reportedsightings addobject:@"turtle1,44.008897,-77.743073"];     [reportedsightings addobject:@"turtle2,43.997620,-77.675193"];     [reportedsightings addobject:@"turtle3,44.001554,-77.689685"];     [reportedsightings addobject:@"turtle4,43.992655,-77.712643"];     [reportedsightings addobject:@"turtle5,44.005708,-77.725666"];      [reportedsightings addobject:@"snake1,43.993950,-77.720637"];     [reportedsightings addobject:@"snake2,43.994176,-77.717224"];     [reportedsightings addobject:@"snake3,43.998308,-77.677515"];     [reportedsightings addobject:@"snake4,44.007523,-77.719716"];     [reportedsightings addobject:@"snake5,43.997320,-77.731911"];     [reportedsightings addobject:@"snake6,43.995390,-77.716450"];      [reportedsightings addobject:@"amphibian1,43.996503,-77.694154"];     [reportedsightings addobject:@"amphibian2,43.989638,-77.704582"];     [reportedsightings addobject:@"amphibian3,44.009406,-77.738130"];     [reportedsightings addobject:@"amphibian4,44.001059,-77.733429"];     [reportedsightings addobject:@"amphibian5,44.005405,-77.713410"];     [reportedsightings addobject:@"amphibian6,44.002750,-77.699245"];     [reportedsightings addobject:@"amphibian7,43.999160,-77.692886"];     [reportedsightings addobject:@"amphibian8,43.993869,-77.722742"];     [reportedsightings addobject:@"amphibian9,43.995589,-77.714681"];     [reportedsightings addobject:@"amphibian10,43.998462,-77.675608"];       [defaults setobject:reportedsightings forkey:@"reportedsightings"];     [defaults synchronize];     reportedsightings = [nsmutablearray arraywitharray:[defaults objectforkey:@"reportedsightings"]];        self.locationmanager = [[cllocationmanager alloc] init];     self.locationmanager.delegate = self;      // check ios 8. without guard code crash "unknown selector" on ios 7.     if ([self.locationmanager respondstoselector:@selector(requestwheninuseauthorization)])         [self.locationmanager requestwheninuseauthorization];      [self.locationmanager startupdatinglocation];     self.mapview.showsuserlocation = yes;      mkcoordinateregion region = {{0.0, 0.0}, {0.0, 0.0}};     region.center.latitude = 43.998564;     region.center.longitude = -77.709888;      [self.mapview setregion:region];        for(int i=0; i<reportedsightings.count; i++)     {         nsstring *reportedsighting = reportedsightings[i];         nsstring *speciesname = [reportedsighting substringtoindex:[reportedsighting rangeofstring:@","].location];         reportedsighting = [reportedsighting substringfromindex:[reportedsighting rangeofstring:@","].location+1];         nsstring *sightinglatitude = [reportedsighting substringtoindex:[reportedsighting rangeofstring:@","].location];         reportedsighting = [reportedsighting substringfromindex:[reportedsighting rangeofstring:@","].location+1];         nsstring *sightinglongitude = reportedsighting;           float latitude = [sightinglatitude floatvalue];         float longitude = [sightinglongitude floatvalue];         cllocationcoordinate2d reportedsightingcoordinates = cllocationcoordinate2dmake(latitude, longitude);           mkpointannotation *point = [[mkpointannotation alloc] init];         point.coordinate = reportedsightingcoordinates;         point.title = speciesname;         point.subtitle = [nsstring stringwithformat:@"%f, %f", latitude, longitude];         [self.mapview addannotation:point];      }  }    - (void)viewdidappear:(bool)animated {     [super viewdidappear:animated];      if ([self.mapview respondstoselector:@selector(camera)])     {         mkmapcamera *newcamera = [[self.mapview camera] copy];          [newcamera setpitch:0.0];         [newcamera setheading:307.197710];         [newcamera setaltitude:14515.983058];          [self.mapview setcamera:newcamera animated:yes];     } }   - (mkannotationview *)mapview:(mkmapview *)mapview viewforannotation:(id <mkannotation>)annotation {     if([annotation iskindofclass:[mkuserlocation class]])         return nil;      if([annotation iskindofclass:[mkpointannotation class]])     {         mkannotationview *pinview = (mkannotationview*)[self.mapview dequeuereusableannotationviewwithidentifier:@"customviewannotation"];          if(!pinview)         {             pinview = [[mkannotationview alloc] initwithannotation:annotation reuseidentifier:@"customviewannotation"];             pinview.canshowcallout = yes;             pinview.image = [uiimage imagenamed:[nsstring stringwithformat:@"%@annotation", [annotation title]]];         }          else         {             pinview.annotation = annotation;         }          return pinview;     }      return nil; }   @end 

for section:

    if(!pinview)     {         pinview = [[mkannotationview alloc] initwithannotation:annotation reuseidentifier:@"customviewannotation"];         pinview.canshowcallout = yes;         pinview.image = [uiimage imagenamed:[nsstring stringwithformat:@"%@annotation", [annotation title]]];     }      else     {         pinview.annotation = annotation;     } 

add line:

pinview.image = [uiimage imagenamed:[nsstring stringwithformat:@"%@annotation", [annotation title]]]; 

also else, that:

if(!pinview)     {         pinview = [[mkannotationview alloc] initwithannotation:annotation reuseidentifier:@"customviewannotation"];         pinview.canshowcallout = yes;         pinview.image = [uiimage imagenamed:[nsstring stringwithformat:@"%@annotation", [annotation title]]];     }      else     {         pinview.image = [uiimage imagenamed:[nsstring stringwithformat:@"%@annotation", [annotation title]]];         pinview.annotation = annotation;     }