MapKit的基本使用

-(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