CLLocation,CLLocationManager

CLLocation

CLLocation用来表示某个位置的地理信息，比如经纬度、海拔等等
@property(readonly, nonatomic) CLLocationCoordinate2D coordinate;
经纬度

@property(readonly, nonatomic) CLLocationDistance altitude;
海拔

@property(readonly, nonatomic) CLLocationDirection course;
路线，航向（取值范围是0.0° ~ 359.9°，0.0°代表真北方向）

@property(readonly, nonatomic) CLLocationSpeed speed;
行走速度（单位是m/s）

CLLocationManager

用- (CLLocationDistance)distanceFromLocation:(const CLLocation *)location方法可以计算2个位置之间的距离

 

@property(assign, nonatomic) CLLocationDistance distanceFilter; 每隔多少米定位一次 @property(assign, nonatomic) CLLocationAccuracy desiredAccuracy; 定位精确度（越精确就越耗电）