IOS笔记：地图的一些东西

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    /*设置起始中心的坐标*/
    CLLocationCoordinate2D center;
    center.latitude = 40.029915;    //纬度
    center.longitude = 116.347082;  //经度
    
    /*缩放级别*/
    MKCoordinateSpan span;
    span.latitudeDelta = 0.2;   //纬度偏差
    span.longitudeDelta = 0.2;  //经度偏差
    /*用来设置坐标显示范围，参数为坐标和缩放级别*/
    MKCoordinateRegion region = {center, span};
    
    [self.MyMapKit setRegion:region];
    
    /*初始化一个大头针*/
    MyAnnotation *ann1 = [[MyAnnotation alloc] init];
    [self.MyMapKit addAnnotation:ann1]; //把大头针加到地图上
    [ann1 release];
    	
}