From: http://www.cocoachina.com/newbie/basic/2012/0201/3926.html
本文由论坛会员yunhuaikong分享
以下为两张图片。如下：
适当的代码段添加如下annotation. MapAnnotation是实现了MKAnnotation的NSObject类:
CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(latitude, longitude);
MapAnnotation *annotation = [[MapAnnotation alloc] initWithcoordiante: coordinate];
[map_view addAnnotations: annotation];
[annotation release];