MKAnnotationView show different text on label - ios

Question

I want to display different text on each annotationView, but same value is displayed on every annotation.
Following is my code :
NSMutableArray *strAnnoTitle;
-(void)callAddAnnotations{
cnt = 0;
[_mapView removeAnnotations:[_mapView annotations]];
for (id obj in arrPropTemp) {
CLLocationCoordinate2D coords = CLLocationCoordinate2DMake([[[arrPropTemp valueForKey:#"Latitude"] objectAtIndex:cnt] floatValue], [[[arrPropTemp valueForKey:#"Longitude"] objectAtIndex:cnt] floatValue]);
strAnnoTitle[cnt] = [obj valueForKey:#"ListPriceForMap"];
// Add an annotation
MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
point.coordinate = coords;
[self.mapView addAnnotation:point];
cnt++;
}
}
-(MKAnnotationView *)createAnnotation:(MKAnnotationView *)viewAn{
UILabel *lbl = (UILabel *)[viewAn viewWithTag:100];
[lbl setText:strAnnoTitle[cnt]];
return viewAn;
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
MKAnnotationView *viewAn = [[[NSBundle mainBundle] loadNibNamed:#"MapAnnotation" owner:self options:nil] lastObject];
viewAn = [self createAnnotation:viewAn];
return viewAn;
return nil;
}
Output:
Where am I getting wrong? How do I solve this?

Answer 1

Change your implementation .
-(void)callAddAnnotations{
cnt = 0;
[_mapView removeAnnotations:[_mapView annotations]];
for (id obj in arrPropTemp) {
CLLocationCoordinate2D coords = CLLocationCoordinate2DMake([[[arrPropTemp valueForKey:#"Latitude"] objectAtIndex:cnt] floatValue], [[[arrPropTemp valueForKey:#"Longitude"] objectAtIndex:cnt] floatValue]);
strAnnoTitle[cnt] = [obj valueForKey:#"ListPriceForMap"];
// Add an annotation
MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
point.coordinate = coords;
[point setTitle:strAnnoTitle[cnt]];
[self.mapView addAnnotation:point];
cnt++;
}
}
change your create method
-(MKAnnotationView *)createAnnotation:(MKAnnotationView *)viewAn{
UILabel *lbl = (UILabel *)[viewAn viewWithTag:100];
[lbl setText: viewAn.annotation.title];//can move this also to delegate
return viewAn;
}
Change your viewForAnnotation method to like this.
-(MKAnnotationView *)mapView:(MKMapView *)MapView viewForAnnotation:(id<MKAnnotation>)annotation{
static NSString *cabAnnotationIdentifier=#"cabAnnotationIdentifier";
MKAnnotationView * viewAn =[MapView dequeueReusableAnnotationViewWithIdentifier:cabAnnotationIdentifier];
if(!annotationView){
MKAnnotationView *viewAn = [[[NSBundle mainBundle] loadNibNamed:#"MapAnnotation" owner:self options:nil] lastObject];
viewAn = [self createAnnotation:viewAn];
}
return viewAn;
}

Answer 2

Take 1 NSObject file with the required fields u want for annotation. Add annotation on mapview and attach information on that Nsobject file also and same do as in viewforannotation method it will work.
Like
1.) NSObject file
REVPin.h
#interface REVPin : NSObject <MKAnnotation> {
CLLocationCoordinate2D coordinate;
NSString *title;
NSString *subtitle;
NSInteger tag;
NSArray *nodes;
}
#property(nonatomic, retain) NSArray *nodes;
#property(readwrite, nonatomic) NSInteger tag;
#property(nonatomic, assign) CLLocationCoordinate2D coordinate;
#property(nonatomic, copy) NSString *title;
-(void)AddPinToMap:(NSMutableArray *)PinArray
{
NSMutableArray *pins = [NSMutableArray array];
oldZoomLevel = (int)[self zoomLevelForMapRect:MapView.visibleMapRect withMapViewSizeInPixels:CGSizeMake(MapView.frame.size.width, MapView.frame.size.height)];
if ([isFirstTimeN isEqualToString:#"YES"]) {
[MapView removeAnnotations:MapView.annotations];
for(int i=0;i<[PinArray count];i++) {
CGFloat latitude=[[[PinArray objectAtIndex:i] objectForKey:#"lat"] floatValue];
CGFloat longitude=[[[PinArray objectAtIndex:i] objectForKey:#"lon"] floatValue];
CLLocationCoordinate2D newCoord = {latitude, longitude};
REVPin *pin = [[REVPin alloc] init];
pin.title = [NSString stringWithFormat:#"Pin %i",i+1];
pin.subtitle = [NSString stringWithFormat:#"Pin %i subtitle",i+1];
pin.coordinate = newCoord;
pin.tag = i;
pin.userId = [NSString stringWithFormat:#"%#",[[PinArray objectAtIndex:i] objectForKey:#"u"]];
[pins addObject:pin];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
REVPin *pin = (REVPin *)annotation;
MKAnnotationView *annView;
if([annotation class] == MKUserLocation.class)
{
return nil;
}
annView = [mapView dequeueReusableAnnotationViewWithIdentifier:#"pin"];
annView = [[MKAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:#"pin"];
[array addObject:pin];
return annView;
}
try by using above way it will work