定位 - MapKit - 基本使用

/**

*  Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException',

reason: 'Could not instantiate class named MKMapView'

*

*  @ 如果storyboard中用到了地图,  需要导入MapKit框架

*/

#import "ViewController.h"

#import <MapKit/MapKit.h>

@interface ViewController ()<MKMapViewDelegate>

/**

*  地图

*/

@property (weak, nonatomic) IBOutlet MKMapView *mapView;

@property (nonatomic, strong) CLLocationManager *mgr;

@property (nonatomic, strong) CLGeocoder *geocoder;

@end

@implementation ViewController

- (CLGeocoder *)geocoder{

if (!_geocoder) {

_geocoder = [[CLGeocoder alloc] init];

}

return _geocoder;

}

- (CLLocationManager *)mgr{

if (!_mgr) {

_mgr = [[CLLocationManager alloc] init];

}

return _mgr;

}

- (void)viewDidLoad {

[super viewDidLoad];

// 在 ios8 中如果想 追踪用户隐私信息, 必须主动请求隐私权限

if (IOS8) {

[self.mgr requestAlwaysAuthorization];

}

//    self.mapView.scrollEnabled = NO;

self.mapView.rotateEnabled = NO;

/** 1. 设置显示类型

*

MKMapTypeStandard  --- 标准(默认)

MKMapTypeSatellite, --- 卫星

MKMapTypeHybrid     --- 混合的

*/

self.mapView.mapType = MKMapTypeStandard;

// 2. 如果想利用 MapKit 获取用户的位置, 可以追踪

/**

MKUserTrackingModeNone = 0, // the user's location is not followed

MKUserTrackingModeFollow, // the map follows the user's location --- 追踪

MKUserTrackingModeFollowWithHeading, // the map follows the user's location and heading -- 追踪并获得方向

*/

self.mapView.userTrackingMode = MKUserTrackingModeFollow;

// 3. 设置代理

self.mapView.delegate = self;

}

#pragma mark - MKMapViewDelegate

/**

*  地图区域改变完成 会调用此方法

*/

- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated

{

LogYellow(@"地图区域改变完成");

/**

*

CLLocationCoordinate2D center;

MKCoordinateSpan span;

*/

LogCyan(@"%f --- %f",self.mapView.region.span.latitudeDelta,  self.mapView.region.span.longitudeDelta);

}

/**

*  地图区域即将改变 会调用此方法

- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated

{

LogYellow(@"地图区域即将改变");

}

*/

/**

*  每次更新用户位置就会调用此方法(调用不频繁, 只有位置变化才会调用)

* @mapView 触发事件的空间

* @userLocation 大头针的模型

*/

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation

{

/**

*  地图上蓝色的点, 称之为大头针

大头针: title - 标题

subtitle - 子标题

location - 位置

heading - 方向

*/

LogRed(@"%f -- %f",userLocation.location.coordinate.latitude, userLocation.location.coordinate.longitude);

// 设置大头针显示内容

//    userLocation.title = @"JGL";

//    userLocation.subtitle = @"NX";

// 利用反地理编码, 设置标题

[self.geocoder reverseGeocodeLocation:userLocation.location completionHandler:^(NSArray *placemarks, NSError *error) {

CLPlacemark *placeMark = [placemarks firstObject];

LogMagenta(@"%@",placeMark);

userLocation.title = placeMark.name;

userLocation.subtitle = placeMark.locality;

}];

// 移动地图到当前用户所在位置

[self.mapView setCenterCoordinate:userLocation.location.coordinate animated:YES];

// 设置地图显示的区域

CLLocationCoordinate2D center = userLocation.location.coordinate;

// 指定经纬度的跨度

MKCoordinateSpan span = MKCoordinateSpanMake(0.001, 0.0001);

// 将用户的当前位置 设置为中心点, 并且制定显示的跨度

MKCoordinateRegion region = MKCoordinateRegionMake(center, span);

[self.mapView setRegion:region animated:YES];

}