CoreLocation 下的定位跟踪测速

#import "ViewController.h"

#import <CoreLocation/CoreLocation.h>

@interface ViewController ()<CLLocationManagerDelegate>

@property(nonatomic,strong)CLLocationManager*manager;;

@property(nonatomic,strong)CLLocation *preLocation;

@property(nonatomic,assign)NSTimeInterval sumtime;

@property(nonatomic,assign)CGFloat sumDistance;

@end

@implementation ViewController

-(CLLocationManager*)manager

{

if (_manager==nil) {

_manager=[[CLLocationManager alloc]init];

}

return _manager;

}

- (void)viewDidLoad {

[super viewDidLoad];

self.manager.delegate=self;

//判断ios7 或者8

if([[UIDevice currentDevice].systemVersion doubleValue]>8.0)

{

//[self.manager requestWhenInUseAuthorization];

[self.manager requestAlwaysAuthorization];

}

[self.manager startUpdatingLocation];

}

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

{

CLLocation *newLocation=[locations lastObject];

if (self.preLocation==nil) {

CLLocationDirection dierction=[newLocation distanceFromLocation:self.preLocation ];

NSTimeInterval dTime=[newLocation.timestamp timeIntervalSinceDate:self.preLocation.timestamp];

//计算速度

CGFloat speed=dierction /dTime;

self.sumDistance+=dierction;

self.sumtime+=dTime;

//平均速度

CGFloat averageSpeed=self.sumDistance/self.sumtime;

NSLog(@"行驶距离%f\n当前速度%f\n平均速度%f\n",self.sumDistance,speed,averageSpeed);

}

self.preLocation=newLocation;

}

@end