iOS中定位当前位置坐标及转换为火星坐标的方法

定位和位置信息获取
定位和反查位置信息要加载两个动态库 CoreLocation.framework 和 MapKit.framework 一个获取坐标一个提供反查
复制代码代码如下:
// appDelgate.h
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate,CLLocationManagerDelegate,MKReverseGeocoderDelegate>

@property （strong, nonatomic） UIWindow *window;

@end

复制代码代码如下:
#import "AppDelegate.h"

@implementation AppDelegate

- （BOOL）application:（UIApplication *）application didFinishLaunchingWithOptions:（NSDictionary *）launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    UIButton *button = [UIButton buttonWithType:UIButtonTypeContactAdd];
    button.frame = CGRectMake（0, 100, 100, 30）;
    [button setTitle:@"定位" forState:UIControlStateNormal];
    [button addTarget:self action:@selector（test） forControlEvents:UIControlEventTouchUpInside];

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake（0, 150, 320, 30）];
    label.tag = 101;
    label.text = @"等待定位中....";
    [self.window addSubview:label];
    [label release];
    [self.window addSubview:button];
    return YES;

}

-（void） test {

    CLLocationManager *locationManager = [[CLLocationManager alloc] init];
    // 设置定位精度，十米，百米，最好
    [locationManager setDesiredAccuracy:kCLLocationAccuracyNearestTenMeters];
    locationManager.delegate = self;

    // 开始时时定位
    [locationManager startUpdatingLocation];
}

// 错误信息
-（void）locationManager:（CLLocationManager *）manager didFailWithError:（NSError *）error {
    NSLog（@"error"）;
}

// 6.0 以上调用这个函数
-（void）locationManager:（CLLocationManager *）manager didUpdateLocations:（NSArray *）locations {

    NSLog（@"%d", [locations count]）;

    CLLocation *newLocation = locations[0];
    CLLocationCoordinate2D oldCoordinate = newLocation.coordinate;
    NSLog（@"旧的经度：%f,旧的纬度：%f",oldCoordinate.longitude,oldCoordinate.latitude）;

//    CLLocation *newLocation = locations[1];
//    CLLocationCoordinate2D newCoordinate = newLocation.coordinate;
//    NSLog（@"经度：%f,纬度：%f",newCoordinate.longitude,newCoordinate.latitude）;

    // 计算两个坐标距离
    //    float distance = [newLocation distanceFromLocation:oldLocation];
    //    NSLog（@"%f",distance）;

    [manager stopUpdatingLocation];

    //------------------位置反编码---5.0之后使用-----------------
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder reverseGeocodeLocation:newLocation
                   completionHandler:^（NSArray *placemarks, NSError *error）{

                       for （CLPlacemark *place in placemarks） {
                           UILabel *label = （UILabel *）[self.window viewWithTag:101];
                           label.text = place.name;
                           NSLog（@"name,%@",place.name）;                       // 位置名
//                           NSLog（@"thoroughfare,%@",place.thoroughfare）;       // 街道
//                           NSLog（@"subThoroughfare,%@",place.subThoroughfare）; // 子街道
//                           NSLog（@"locality,%@",place.locality）;               // 市
//                           NSLog（@"subLocality,%@",place.subLocality）;         // 区
//                           NSLog（@"country,%@",place.country）;                 // 国家
                       }

                   }];

}

// 6.0 调用此函数
-（void）locationManager:（CLLocationManager *）manager didUpdateToLocation:（CLLocation *）newLocation fromLocation:（CLLocation *）oldLocation {
    NSLog（@"%@", @"ok"）;
}

@end

转换为火星坐标
这个写的公共类叫做:GPScombineClass类主要展示GPS位置的定位，GPS坐标的获取，然后从手机坐标转换成火星坐标，继而在需要的情况下，由火星转百度，百度转火星的详细算法；
在GPScombineClass.h中
复制代码代码如下:
#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>
#import "CSqlite.h"
#import <MapKit/MapKit.h>
@interface GPScombineClass : NSObject<MKMapViewDelegate>{
    CLLocationManager *locationManager;
    CSqlite *m_sqlite;

    UILabel *m_locationName;
    MKMapView *mainMapView;
@public CLLocationCoordinate2D baidulocation;
    CLLocationCoordinate2D deleeverLocation;
}
-（void）OpenGPSmapView;
//在地图上放上自己的位置--外接接口
-（void）setMyMapPonitByMKMapView:（MKMapView *）MyMap;
@end

复制代码代码如下:
@interface POI : NSObject <MKAnnotation> {

    CLLocationCoordinate2D coordinate;
    NSString *subtitle;
    NSString *title;
}

@property （nonatomic,readonly） CLLocationCoordinate2D coordinate;
@property （nonatomic,retain） NSString *subtitle;
@property （nonatomic,retain） NSString *title;

-（id） initWithCoords:（CLLocationCoordinate2D） coords;

@end

在GPScombineClass.m中
复制代码代码如下:
#import "GPScombineClass.h"
const double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
@implementation GPScombineClass
-（void）OpenGPSmapView{
    m_sqlite = [[CSqlite alloc]init];
    [m_sqlite openSqlite];
    if （[CLLocationManager locationServicesEnabled]） { // 检查定位服务是否可用
        locationManager = [[CLLocationManager alloc] init];
        locationManager.delegate = self;
        locationManager.distanceFilter=0.5;
        locationManager.desiredAccuracy = kCLLocationAccuracyBest;
        [locationManager startUpdatingLocation]; // 开始定位
    }

    NSLog（@"GPS 启动"）;
}

// 定位成功时调用
- （void）locationManager:（CLLocationManager *）manager
    didUpdateToLocation:（CLLocation *）newLocation
           fromLocation:（CLLocation *）oldLocation
{
    CLLocationCoordinate2D mylocation = newLocation.coordinate;//手机GPS

    mylocation = [self zzTransGPS:mylocation];///转换成火星GPS
    deleeverLocation=mylocation;
    baidulocation=[self hhTrans_bdGPS:mylocation];//转换成百度地图
     /*
    //显示火星坐标
    [self SetMapPoint:mylocation MKMapView:mainMapView];

    /////////获取位置信息
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder reverseGeocodeLocation:newLocation completionHandler:^（NSArray* placemarks,NSError *error）
     {
         if （placemarks.count >0   ）
         {
             CLPlacemark * plmark = [placemarks objectAtIndex:0];

             NSString * country = plmark.country;
             NSString * city    = plmark.locality;


             NSLog（@"%@-%@-%@",country,city,plmark.name）;
             self->m_locationName.text =plmark.name;
             NSLog（@"%@",self->m_locationName）;
         }

         NSLog（@"%@",placemarks）;

     }];

    //[geocoder release];
    */
}
// 定位失败时调用
- （void）locationManager:（CLLocationManager *）manager
       didFailWithError:（NSError *）error {
    NSLog（@"定位失败"）;
}

//把手机GPS坐标转换成火星坐标（google坐标）
-（CLLocationCoordinate2D）zzTransGPS:（CLLocationCoordinate2D）yGps
{
    int TenLat=0;
    int TenLog=0;
    TenLat = （int）（yGps.latitude*10）;
    TenLog = （int）（yGps.longitude*10）;
    NSString *sql = [[NSString alloc]initWithFormat:@"select offLat,offLog from gpsT where lat=%d and log = %d",TenLat,TenLog];
    NSLog（sql）;
    sqlite3_stmt* stmtL = [m_sqlite NSRunSql:sql];
    int offLat=0;
    int offLog=0;
    while （sqlite3_step（stmtL）==SQLITE_ROW）
    {
        offLat = sqlite3_column_int（stmtL, 0）;
        offLog = sqlite3_column_int（stmtL, 1）;

    }

    yGps.latitude = yGps.latitude+offLat*0.0001;
    yGps.longitude = yGps.longitude + offLog*0.0001;
    return yGps;


}
//在地图上放上自己的位置--外接接口
-（void）setMyMapPonitByMKMapView:（MKMapView *）MyMap{
//显示火星坐标
    [self SetMapPoint:deleeverLocation MKMapView:MyMap];
    MyMap=mainMapView;
}
//在地图上放上自己的位置
-（void）SetMapPoint:（CLLocationCoordinate2D）myLocation MKMapView:（MKMapView *）mapView
{
//    POI* m_poi = [[POI alloc]initWithCoords:myLocation];
//
//    [mapView addAnnotation:m_poi];

    MKCoordinateRegion theRegion = { {0.0, 0.0 }, { 0.0, 0.0 } };
    theRegion.center=myLocation;
    [mapView setZoomEnabled:YES];
    [mapView setScrollEnabled:YES];
    theRegion.span.longitudeDelta = 0.01f;
    theRegion.span.latitudeDelta = 0.01f;
    [mapView setRegion:theRegion animated:YES];

}

//把火星坐标转换成百度坐标
-（CLLocationCoordinate2D）hhTrans_bdGPS:（CLLocationCoordinate2D）fireGps
{
    CLLocationCoordinate2D bdGps;
    double huo_x=fireGps.longitude;
    double huo_y=fireGps.latitude;
    double z = sqrt（huo_x * huo_x + huo_y * huo_y） + 0.00002 * sin（huo_y * x_pi）;
    double theta = atan2（huo_y, huo_x） + 0.000003 * cos（huo_x * x_pi）;
    bdGps.longitude = z * cos（theta） + 0.0065;
    bdGps.latitude = z * sin（theta） + 0.006;
    return bdGps;
}
#pragma mark 显示商品信息
#pragma mark
-（void）showPurchaseOnMapByLocation:（CLLocationCoordinate2D）baiduGPS MKMapView:（MKMapView*）myMapView{
    CLLocationCoordinate2D googleGPS;
    googleGPS=[self hhTrans_GCGPS:baiduGPS];//转换为百度
    [self SetPurchaseMapPoint:googleGPS MKMapView:myMapView];
}
//把百度地图转换成谷歌地图--火星坐标
-（CLLocationCoordinate2D）hhTrans_GCGPS:（CLLocationCoordinate2D）baiduGps
{
    CLLocationCoordinate2D googleGps;
    double bd_x=baiduGps.longitude - 0.0065;
    double bd_y=baiduGps.latitude - 0.006;
    double z = sqrt（bd_x * bd_x + bd_y * bd_y） - 0.00002 * sin（bd_y * x_pi）;
    double theta = atan2（bd_y, bd_x） - 0.000003 * cos（bd_x * x_pi）;
    googleGps.longitude = z * cos（theta）;
    googleGps.latitude = z * sin（theta）;
    return googleGps;
}

-（void）SetPurchaseMapPoint:（CLLocationCoordinate2D）myLocation MKMapView:（MKMapView *）mapView
{
    POI* m_poi = [[POI alloc]initWithCoords:myLocation];

    [mapView addAnnotation:m_poi];

    MKCoordinateRegion theRegion = { {0.0, 0.0 }, { 0.0, 0.0 } };
    theRegion.center=myLocation;
    [mapView setZoomEnabled:YES];
    [mapView setScrollEnabled:YES];
    theRegion.span.longitudeDelta = 0.01f;
    theRegion.span.latitudeDelta = 0.01f;
    [mapView setRegion:theRegion animated:YES];}
@end