地图

#import "ViewController.h"
#import "JZLocationConverter.h"
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>

@interface ViewController ()<CLLocationManagerDelegate,MKMapViewDelegate>
/**
 *  定位管理器
 */
@property (nonatomic,strong) CLLocationManager *locationManager;
/**
 *  地理位置解码编码器
 */
@property (nonatomic,strong) CLGeocoder *geocoder;
/**
 *  地图控件
 */
@property (nonatomic,strong) MKMapView *mapView;
/**
 *  大头针
 */
@property (nonatomic,strong)  MKPointAnnotation *pointAnnotation;

@end

@implementation ViewController

- (CLLocationManager *)locationManager
{
    if (!_locationManager) {
        //创建定位管理器对象，作用是定位当前用户的经度和纬度
        _locationManager = [[CLLocationManager alloc] init];
        _locationManager.delegate = self;
        _locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
        [_locationManager requestAlwaysAuthorization];
        _locationManager.distanceFilter = 10.f;
    }
    return _locationManager;
}

- (CLGeocoder *)geocoder
{
    if (!_geocoder) {
        _geocoder = [[CLGeocoder alloc] init];
    }
    return _geocoder;
}

- (MKMapView *)mapView
{
    if (!_mapView) {
        _mapView = [[MKMapView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
        //设置地图的类型
        _mapView.maskView = MKMapTypeStandard;
        //显示当前用户的位置
        _mapView.showsUserLocation = YES;
    }
    return _mapView;
}

- (MKPointAnnotation *)pointAnnotation
{
    if (!_pointAnnotation) {
        _pointAnnotation = [[MKPointAnnotation alloc] init];
    }
    return _pointAnnotation;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    //info.plist文件添加以下两条(或者其中一条):
    //NSLocationWhenInUseUsageDescription 在使用应用期间
    //NSLocationAlwaysUsageDescription 始终
    [self.view addSubview:self.mapView];
    if(![CLLocationManager locationServicesEnabled]||[CLLocationManager authorizationStatus]!=kCLAuthorizationStatusAuthorizedWhenInUse){
        [_locationManager requestWhenInUseAuthorization];
    }
    [self.locationManager startUpdatingLocation];
    
}
#pragma mark -定位代理经纬度回调
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
{
    [self.locationManager stopUpdatingLocation];
    CLLocation *newLocation = locations[0];
    CLLocationCoordinate2D oCoordinate = newLocation.coordinate;
    CLLocationCoordinate2D gcjPt = [JZLocationConverter wgs84ToGcj02:oCoordinate];
    //定义地图的缩放比例
    MKCoordinateSpan coordinateSpan;
    coordinateSpan.longitudeDelta = 0.1;
    coordinateSpan.latitudeDelta = 0.1;
    //为地图添加定义的内容
    MKCoordinateRegion coordinateRegion;
    coordinateRegion.center = gcjPt;
    coordinateRegion.span = coordinateSpan;
    
    //添加到地图上
    [self.mapView setRegion:coordinateRegion animated:YES];
    
    [self.geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
        for (CLPlacemark *place in placemarks) {
            NSDictionary *location = [place addressDictionary];
            
            //设置大头针坐标
            self.pointAnnotation.coordinate = gcjPt;
            self.pointAnnotation.title = [location objectForKey:@"State"];
            self.pointAnnotation.subtitle = [location objectForKey:@"SubLocality"];
            
            //添加大头针对象
            [self.mapView addAnnotation:self.pointAnnotation];
            
            NSLog(@"国家：%@",[location objectForKey:@"Country"]);
            NSLog(@"城市：%@",[location objectForKey:@"State"]);
            NSLog(@"区：%@",[location objectForKey:@"SubLocality"]);
        }
    }];
}

@end

#import <Foundation/Foundation.h>
#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>


@interface MSManageLocation : NSObject
/**
 *	@brief	世界标准地理坐标(WGS-84) 转换成 中国国测局地理坐标（GCJ-02）<火星坐标>
 *
 *  ####只在中国大陆的范围的坐标有效，以外直接返回世界标准坐标
 *
 *	@param 	location 	世界标准地理坐标(WGS-84)
 *
 *	@return	中国国测局地理坐标（GCJ-02）<火星坐标>
 */
+ (CLLocationCoordinate2D)wgs84ToGcj02:(CLLocationCoordinate2D)location;


/**
 *	@brief	中国国测局地理坐标（GCJ-02） 转换成 世界标准地理坐标（WGS-84）
 *
 *  ####此接口有1－2米左右的误差，需要精确定位情景慎用
 *
 *	@param 	location 	中国国测局地理坐标（GCJ-02）
 *
 *	@return	世界标准地理坐标（WGS-84）
 */
+ (CLLocationCoordinate2D)gcj02ToWgs84:(CLLocationCoordinate2D)location;


/**
 *	@brief	世界标准地理坐标(WGS-84) 转换成 百度地理坐标（BD-09)
 *
 *	@param 	location 	世界标准地理坐标(WGS-84)
 *
 *	@return	百度地理坐标（BD-09)
 */
+ (CLLocationCoordinate2D)wgs84ToBd09:(CLLocationCoordinate2D)location;


/**
 *	@brief	中国国测局地理坐标（GCJ-02）<火星坐标> 转换成 百度地理坐标（BD-09)
 *
 *	@param 	location 	中国国测局地理坐标（GCJ-02）<火星坐标>
 *
 *	@return	百度地理坐标（BD-09)
 */
+ (CLLocationCoordinate2D)gcj02ToBd09:(CLLocationCoordinate2D)location;


/**
 *	@brief	百度地理坐标（BD-09) 转换成 中国国测局地理坐标（GCJ-02）<火星坐标>
 *
 *	@param 	location 	百度地理坐标（BD-09)
 *
 *	@return	中国国测局地理坐标（GCJ-02）<火星坐标>
 */
+ (CLLocationCoordinate2D)bd09ToGcj02:(CLLocationCoordinate2D)location;


/**
 *	@brief	百度地理坐标（BD-09) 转换成 世界标准地理坐标（WGS-84）
 *
 *  ####此接口有1－2米左右的误差，需要精确定位情景慎用
 *
 *	@param 	location 	百度地理坐标（BD-09)
 *
 *	@return	世界标准地理坐标（WGS-84）
 */
+ (CLLocationCoordinate2D)bd09ToWgs84:(CLLocationCoordinate2D)location;
@end



#import "MSManageLocation.h"

#import <CoreLocation/CoreLocation.h>
#define LAT_OFFSET_0(x,y) -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * sqrt(fabs(x))
#define LAT_OFFSET_1 (20.0 * sin(6.0 * x * M_PI) + 20.0 * sin(2.0 * x * M_PI)) * 2.0 / 3.0
#define LAT_OFFSET_2 (20.0 * sin(y * M_PI) + 40.0 * sin(y / 3.0 * M_PI)) * 2.0 / 3.0
#define LAT_OFFSET_3 (160.0 * sin(y / 12.0 * M_PI) + 320 * sin(y * M_PI / 30.0)) * 2.0 / 3.0

#define LON_OFFSET_0(x,y) 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * sqrt(fabs(x))
#define LON_OFFSET_1 (20.0 * sin(6.0 * x * M_PI) + 20.0 * sin(2.0 * x * M_PI)) * 2.0 / 3.0
#define LON_OFFSET_2 (20.0 * sin(x * M_PI) + 40.0 * sin(x / 3.0 * M_PI)) * 2.0 / 3.0
#define LON_OFFSET_3 (150.0 * sin(x / 12.0 * M_PI) + 300.0 * sin(x / 30.0 * M_PI)) * 2.0 / 3.0

#define RANGE_LON_MAX 137.8347
#define RANGE_LON_MIN 72.004
#define RANGE_LAT_MAX 55.8271
#define RANGE_LAT_MIN 0.8293
// jzA = 6378245.0, 1/f = 298.3
// b = a * (1 - f)
// ee = (a^2 - b^2) / a^2;
#define jzA 6378245.0
#define jzEE 0.00669342162296594323

@implementation MSManageLocation
+ (double)transformLat:(double)x bdLon:(double)y
{
    double ret = LAT_OFFSET_0(x, y);
    ret += LAT_OFFSET_1;
    ret += LAT_OFFSET_2;
    ret += LAT_OFFSET_3;
    return ret;
}

+ (double)transformLon:(double)x bdLon:(double)y
{
    double ret = LON_OFFSET_0(x, y);
    ret += LON_OFFSET_1;
    ret += LON_OFFSET_2;
    ret += LON_OFFSET_3;
    return ret;
}

+ (BOOL)outOfChina:(double)lat bdLon:(double)lon
{
    if (lon < RANGE_LON_MIN || lon > RANGE_LON_MAX)
        return true;
    if (lat < RANGE_LAT_MIN || lat > RANGE_LAT_MAX)
        return true;
    return false;
}

+ (CLLocationCoordinate2D)gcj02Encrypt:(double)ggLat bdLon:(double)ggLon
{
    CLLocationCoordinate2D resPoint;
    double mgLat;
    double mgLon;
    if ([self outOfChina:ggLat bdLon:ggLon]) {
        resPoint.latitude = ggLat;
        resPoint.longitude = ggLon;
        return resPoint;
    }
    double dLat = [self transformLat:(ggLon - 105.0)bdLon:(ggLat - 35.0)];
    double dLon = [self transformLon:(ggLon - 105.0) bdLon:(ggLat - 35.0)];
    double radLat = ggLat / 180.0 * M_PI;
    double magic = sin(radLat);
    magic = 1 - jzEE * magic * magic;
    double sqrtMagic = sqrt(magic);
    dLat = (dLat * 180.0) / ((jzA * (1 - jzEE)) / (magic * sqrtMagic) * M_PI);
    dLon = (dLon * 180.0) / (jzA / sqrtMagic * cos(radLat) * M_PI);
    mgLat = ggLat + dLat;
    mgLon = ggLon + dLon;
    
    resPoint.latitude = mgLat;
    resPoint.longitude = mgLon;
    return resPoint;
}

+ (CLLocationCoordinate2D)gcj02Decrypt:(double)gjLat gjLon:(double)gjLon {
    CLLocationCoordinate2D  gPt = [self gcj02Encrypt:gjLat bdLon:gjLon];
    double dLon = gPt.longitude - gjLon;
    double dLat = gPt.latitude - gjLat;
    CLLocationCoordinate2D pt;
    pt.latitude = gjLat - dLat;
    pt.longitude = gjLon - dLon;
    return pt;
}

+ (CLLocationCoordinate2D)bd09Decrypt:(double)bdLat bdLon:(double)bdLon
{
    CLLocationCoordinate2D gcjPt;
    double x = bdLon - 0.0065, y = bdLat - 0.006;
    double z = sqrt(x * x + y * y) - 0.00002 * sin(y * M_PI);
    double theta = atan2(y, x) - 0.000003 * cos(x * M_PI);
    gcjPt.longitude = z * cos(theta);
    gcjPt.latitude = z * sin(theta);
    return gcjPt;
}

+(CLLocationCoordinate2D)bd09Encrypt:(double)ggLat bdLon:(double)ggLon
{
    CLLocationCoordinate2D bdPt;
    double x = ggLon, y = ggLat;
    double z = sqrt(x * x + y * y) + 0.00002 * sin(y * M_PI);
    double theta = atan2(y, x) + 0.000003 * cos(x * M_PI);
    bdPt.longitude = z * cos(theta) + 0.0065;
    bdPt.latitude = z * sin(theta) + 0.006;
    return bdPt;
}


+ (CLLocationCoordinate2D)wgs84ToGcj02:(CLLocationCoordinate2D)location
{
    return [self gcj02Encrypt:location.latitude bdLon:location.longitude];
}

+ (CLLocationCoordinate2D)gcj02ToWgs84:(CLLocationCoordinate2D)location
{
    return [self gcj02Decrypt:location.latitude gjLon:location.longitude];
}


+ (CLLocationCoordinate2D)wgs84ToBd09:(CLLocationCoordinate2D)location
{
    CLLocationCoordinate2D gcj02Pt = [self gcj02Encrypt:location.latitude
                                                  bdLon:location.longitude];
    return [self bd09Encrypt:gcj02Pt.latitude bdLon:gcj02Pt.longitude] ;
}

+ (CLLocationCoordinate2D)gcj02ToBd09:(CLLocationCoordinate2D)location
{
    return  [self bd09Encrypt:location.latitude bdLon:location.longitude];
}

+ (CLLocationCoordinate2D)bd09ToGcj02:(CLLocationCoordinate2D)location
{
    return [self bd09Decrypt:location.latitude bdLon:location.longitude];
}

+ (CLLocationCoordinate2D)bd09ToWgs84:(CLLocationCoordinate2D)location
{
    CLLocationCoordinate2D gcj02 = [self bd09ToGcj02:location];
    return [self gcj02Decrypt:gcj02.latitude gjLon:gcj02.longitude];
}
@end