iOS中定位当前位置坐标及转换为火星坐标的方法

//   

//    [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];