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

CoreLocation 下的定位跟踪测速

原文：http://www.cnblogs.com/tangranyang/p/4655805.html