xcode - 異なる色の注釈を作成しますか?

Question

私は XCode の開発を始めたばかりで、助けが得られるかどうか疑問に思っていました。地図上に場所を表示しようとしています。マップが機能していて、基本的な注釈もあります。ただし、たとえば、ガソリンスタンドの注釈を緑色にしたいと思います。そして、おそらく赤いショッピングモール。チュートリアルを見つけましたが、すべて別の色に変わります。特定の注釈のみを赤く、その他を緑色にするにはどうすればよいですか? （分解しても構わないのであれば、私はまだ学ぼうとしています）:)

ありがとう！

これが私のコードです。ViewController.h:

    #import <UIKit/UIKit.h>
    #import <MapKit/MapKit.h>

    @interface ViewController : UIViewController <MKMapViewDelegate>

    @property (nonatomic, strong) IBOutlet MKMapView *mapView;

    @end

ViewController.m:

      #import "ViewController.h"
      #import "Annotation.h"

       @interface ViewController ()

       @end

       @implementation ViewController

     - (void)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation  (MKPinAnnotationView *)view {
view.pinColor = MKPinAnnotationColorGreen;

       }

      - (void)viewDidLoad
     {
       [super viewDidLoad];
       //---------- Grocery Stores--------------



       //---------------Meijer Richmond,KY Annotation--------------
       //Annotation
       //Create a coordinate for use with the annotation
       CLLocationCoordinate2D meijerRichmondLocation;
       meijerRichmondLocation.latitude = 37.76486;
       meijerRichmondLocation.longitude = -84.29691;


       //Create annotation obj
       Annotation *meijerAnnotation = [Annotation alloc];
       meijerAnnotation.coordinate = meijerRichmondLocation;
       meijerAnnotation.title = @"Meijer Richmond";
       meijerAnnotation.subtitle = @" 2013 Lantern Ridge Dr.";

       [self.mapView addAnnotation:meijerAnnotation];
//-------------------------------------------------------

//---------------Meijer Reynold Road Lexington, KY Annotation--------------
//Annotation
//Create a coordinate for use with the annotation
CLLocationCoordinate2D meijerLex1Location;
meijerLex1Location.latitude = 37.995744;
meijerLex1Location.longitude = -84.531546;


//Create annotation obj
Annotation *meijerLex1Annotation = [Annotation alloc];
meijerLex1Annotation.coordinate = meijerLex1Location;
meijerLex1Annotation.title = @"Meijer on Reynolds Road";
meijerLex1Annotation.subtitle = @"351 Meijer Way Suite 100";

[self.mapView addAnnotation:meijerLex1Annotation];
//----------------------------------------------------------------------


//---------------Meijer Lexington, KY Annotation-------------------------------
MKPointAnnotation *meijerLex2Annotation = [[MKPointAnnotation alloc] init];
meijerLex2Annotation.title = @"Meijer on Man-O-War";
meijerLex2Annotation.subtitle = @"2155 Paul Jones Way";
meijerLex2Annotation.coordinate = CLLocationCoordinate2DMake(38.0208932,-84.420606);
[self.mapView addAnnotation:meijerLex2Annotation];





//------------ Malls ----------------



//-------------------Mall Annotation---------------------
//Mall Annotation
//Create a coordinate for use with the annotation
CLLocationCoordinate2D fayetteMallLocation;
fayetteMallLocation.latitude = 37.9909;
fayetteMallLocation.longitude = -84.5269;


//Create annotation obj
Annotation *fayetteMallAnnotation = [Annotation alloc];
fayetteMallAnnotation.coordinate = fayetteMallLocation;
fayetteMallAnnotation.title = @"Fayette Mall";
fayetteMallAnnotation.subtitle = @"Lexington's Main Shopping Center.";

//-------------------------------------------------------



[self.mapView addAnnotation:fayetteMallAnnotation];


self.mapView.delegate = self;
// Do any additional setup after loading the view, typically from a nib.
    }

     - (void)didReceiveMemoryWarning
     {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
     }

   @end