Create multiple annotations in Plist

MyAnnotation.m:

@implementation MyAnnotation
@synthesize title, subtitle, coordinate;

-(void) dealloc {
[super dealloc];
self.title = nil;
self.subtitle = nil;
}


MyAnnotation.h

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

@interface MyAnnotation : NSObject<MKAnnotation> {
CLLocationCoordinate2D coordinate;
NSString *title;
NSString *subtitle;
}

@property (nonatomic, assign) CLLocationCoordinate2D coordinate;
@property (nonatomic, copy) NSString* title;
@property (nonatomic, copy) NSString* subtitle;

Running through the plist in ViewDidLoad in MapViewController.m (array containg dictionaries for each pin) and adding annotations.

NSString *path = [[NSBundle mainBundle] pathForResource:@"Annotations" ofType:@"plist"];
NSMutableArray* anns = [[NSMutableArray alloc] initWithContentsOfFile:path];

for(int i = 0; i < [anns count]; i++) {
float realLatitude = [[[anns objectAtIndex:i] objectForKey:@"latitude"] floatValue];
float realLongitude = [[[anns objectAtIndex:i] objectForKey:@"longitude"] floatValue];

MyAnnotation* myAnnotation = [[MyAnnotation alloc] init];
CLLocationCoordinate2D theCoordinate;
theCoordinate.latitude = realLatitude;
theCoordinate.longitude = realLongitude;
myAnnotation.coordinate = theCoordinate;
myAnnotation.title = [[anns objectAtIndex:i] objectForKey:@"title"];
myAnnotation.subtitle = [[anns objectAtIndex:i] objectForKey:@"subtitle"];
[mapView addAnnotation:myAnnotation];
[annotations addObject:myAnnotation];
[myAnnotation release];
}

EDIT:
I have added the viewForAnnotation method which sets the color but how can I set the color of each pin individually?

-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation {
MKPinAnnotationView *pinView = nil;

if(annotation != mapView.userLocation) {
static NSString *defaultPinID = @"com.invasivecode.pin";
pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil ) pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];

pinView.pinColor = MKPinAnnotationColorPurple;
pinView.canShowCallout = YES;
pinView.animatesDrop = YES;
}
else {
[mapView.userLocation setTitle:@"I am here"];
}

return pinView;
}