Show dynamic annotation output in mapview

Question

I am developing an application using MKMapView . I have a few annotations. Now I want to display a custom annotation image for the pin. I created my own class for MapViewAnnotation.

 #import <Foundation/Foundation.h> #import <MapKit/MapKit.h> @interface MapViewAnnotation : NSObject <MKAnnotation> @property (nonatomic,copy) NSString *title; @property (nonatomic,copy) NSString *subtitle; @property (nonatomic, readonly) CLLocationCoordinate2D coordinate; -(id) initWithTitle:(NSString *) title SubTitle:(NSString *)subtitle AndCoordinate:(CLLocationCoordinate2D)coordinate; @end 

---

 #import "MapViewAnnotation.h" @implementation MapViewAnnotation @synthesize coordinate=_coordinate; @synthesize title=_title; -(id) initWithTitle:(NSString *) title SubTitle:(NSString *)subtitle AndCoordinate:(CLLocationCoordinate2D)coordinate; { self = [super init]; _title = title; _coordinate = coordinate; _subtitle = subtitle; return self; } @end 

I get a few lat-long from api and showing like this:

 [self.map_parking addAnnotations:[self createAnnotations]]; 

---

 - (NSMutableArray *)createAnnotations { NSMutableArray *annotations = [[NSMutableArray alloc] init]; for (NSDictionary *row in arrfinal) { NSNumber *latitude = [row objectForKey:@"latitude"]; NSNumber *longitude = [row objectForKey:@"longitude"]; NSString *title = [row objectForKey:@"title"]; NSString *subtitle = [row objectForKey:@"subtitle"]; NSString *rate = [row objectForKey:@"rate"]; //Create coordinates from the latitude and longitude values CLLocationCoordinate2D coord; coord.latitude = latitude.doubleValue; coord.longitude = longitude.doubleValue; MapViewAnnotation *annotation = [[MapViewAnnotation alloc] initWithTitle:title SubTitle:subtitle AndCoordinate:coord]; MKAnnotationView *av = [map_parking viewForAnnotation:annotation]; if ([rate isEqualToString:@"0.00"]) { av.image = [UIImage imageNamed:@"marker2"]; } else { av.image = [UIImage imageNamed:@"marker"]; } [annotations addObject:annotation]; } return annotations; } 

To display the annotation, I use the link to this method from this link: MKMapView: instead of the Pin annotation, a custom view

 -(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation { MKAnnotationView *pinView = nil; if(annotation != map_parking.userLocation) { static NSString *defaultPinID = @"com.invasivecode.pin"; pinView = (MKAnnotationView *)[map_parking dequeueReusableAnnotationViewWithIdentifier:defaultPinID]; if ( pinView == nil ) pinView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID]; pinView.canShowCallout = YES; //pinView.animatesDrop = YES; for (int i=0; i<arrrates.count; i++) { if ([[arrrates objectAtIndex:i] isEqualToString:@"0.00"]) { pinView.image = [UIImage imageNamed:@"marker1"]; } else if ([[arrrates objectAtIndex:i] isEqualToString:@"100.71"]) { pinView.image = [UIImage imageNamed:@"marker2"]; } else { pinView.image = [UIImage imageNamed:@"marker3"]; } } } else { [map_parking.userLocation setTitle:@"I am here"]; } return pinView; } 

In this if-else method, the condition works well, but all the pinout images that were the last condition.

Answer 1

Put for loop out

 if ( pinView == nil ) 

if the block suggested that it only makes reusable notes, and will be executed only once if the contact object already exists.