Map customize some of the problems

I added a lot of labels on the map, click on the pop-up AnnotationView label includes many information such as qq, address, phone, pictures, etc., but I am not in the past some of the data transfer, the system Annotation only the title, subtitle two attributes, I use a proxy
- (MKAnnotationView *) mapView: (MKMapView *) mapView viewForAnnotation: (id ) annotation;
Data can be transferred only two of my Annotation have a custom that I need to write their own agent?
Reply:
The problem lies in MKAnnotationView on the bar? Need to define a