ios developers how to customize the label pin

When ios development, I want to show in the Google Maps display different numbers on the pin, so that people can see at a glance the different pins, not only display content at the click of a pin, direct display. . . . .
But now that ideas are not, you big ox gets advice
Reply:
http://blog.sina.com.cn/s/blog_86747aaf0100sx4j.html reference to this
Reply:
How to make custom contact pins and the latitude and longitude together? That is how to make the title displayed on the pin it?
Reply:
Simply, is a custom pin

- (MKAnnotationView *) viewForAnnotation: (id ) annotation
You can implement custom