-(CLLocationManager *)mgr{    if (_mgr == nil) {                _mgr = [[CLLocationManager alloc]init];        //定位授权        [_mgr requestAlwaysAuthorization];        [_mgr requestWhenInUseAuthorization];                //定位精度        _mgr.desiredAccuracy = kCLLocationAccuracyBest;        //更新距离        _mgr.distanceFilter = 10;                _mgr.delegate = self;    }    return _mgr;}

#import "ViewController.h"#import <MapKit/MapKit.h>#import <CoreLocation/CoreLocation.h>@interface ViewController ()<MKMapViewDelegate, CLLocationManagerDelegate>/** *  mapView，storyboard连接 */@property (weak, nonatomic) IBOutlet MKMapView *mapView;/** *  按钮，回到定位位置，storyboard连接 */- (IBAction)currentPosition;@property (nonatomic, strong) CLLocationManager *mgr;@end@implementation ViewController-(CLLocationManager *)mgr{    if (_mgr == nil) {                _mgr = [[CLLocationManager alloc]init];        //定位授权        [_mgr requestAlwaysAuthorization];        [_mgr requestWhenInUseAuthorization];                //定位精度        _mgr.desiredAccuracy = kCLLocationAccuracyBest;        //更新距离        _mgr.distanceFilter = 10;                _mgr.delegate = self;    }    return _mgr;}- (void)viewDidLoad {    [super viewDidLoad];#warning IOS8中变化    /*     1.定位授权     requestWhenInUseAuthorization()     requestAlwaysAuthorization()     2.info.plist配置这两个key     NSLocationAlwaysUsageDescription     NSLocationWhenInUseUsageDescription     */        //0.开始定位    [self.mgr startUpdatingLocation];        //1.跟踪用户位置    self.mapView.userTrackingMode = MKUserTrackingModeFollow;    self.mapView.showsUserLocation = YES;        //2.设置地图类型    self.mapView.mapType = MKMapTypeStandard;        //3.设置地图代理    self.mapView.delegate = self;}#pragma mark - 关闭定位-(void)viewWillDisappear:(BOOL)animated{    [super viewWillDisappear:animated];    //停止定位    [self.mgr stopUpdatingLocation];}#pragma mark - MKMapViewDelegate#pragma mark  位置改变-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{    NSLog(@"didUpdateUserLocation：%@",userLocation.location);        //位置描述标题    userLocation.title = @"我在这里";    userLocation.subtitle = @"我真的在这里";    //中心    CLLocationCoordinate2D center = userLocation.coordinate;    //显示经纬跨度    MKCoordinateSpan span = MKCoordinateSpanMake(0.002214, 0.001751);    //范围    MKCoordinateRegion region = MKCoordinateRegionMake(center, span);    //设置范围    [mapView setRegion:region animated:YES];}#pragma mark MKMapViewDelegate代理方法，显示区域改变-(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{    NSLog(@"center.latitude:%f--center.longitude:%f", mapView.region.center.latitude, mapView.region.center.longitude);    NSLog(@"span.latitudeDelta:%f--span.longitudeDelta:%f", mapView.region.span.latitudeDelta, mapView.region.span.longitudeDelta);}#pragma mark - CLLocationManagerDelegate代理方法-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{    NSLog(@"%@",[locations firstObject]);}#pragma mark - 回到定位位置- (IBAction)currentPosition {    [self.mapView setCenterCoordinate:self.mapView.userLocation.location.coordinate animated:YES];}@end