How do I add new annotations to an MKAnnotationView

I finally found how to add pins to my image.I will use Mkannotationview and set its image property.B开发者_开发知识库ut I don't know how to add an (more) annotation(s) to it.

To add annotations:

• get the array of annotations from the map view
• make a mutable copy
• add any new annotations
• set the annotations for the map view to the modified array