目前经纬度有好几个标准，各个标准之间差异较大，特别是百度和高德，国际标准和火星坐标，在做导航的时候同一个经纬度定位的地点相差甚远，为了减少不必要的困扰，特将各种经纬度之间的转换分享给大家，希望对大家有帮助，直接上代码。
1.创建一个集成自NSObject 的工具类LXMapTool,在.h中声明外部要调用的方法，导入<CoreLocation/CoreLocation.h>
//
//LXMapTool.h
//
// Created by Leeson on 2017/9/12.
// Copyright © 2017年 Leeson. All rights reserved.
//
#import<Foundation/Foundation.h>
#import<CoreLocation/CoreLocation.h>
@interface LXMapTool :NSObject
/**
* 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;
/**
* 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;
/**
* 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;
/**
* 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;
/**
* 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;
/**
* 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
2.在.m中实现.h的各种方法
//
// LXMapTool.m//
// Created by Leeson on 2017/9/12.
// Copyright © 2017年 Leeson. All rights reserved.
//
#import "LXMapTool.h"
//定义一些要用的宏
#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_MAX137.8347
#define RANGE_LON_MIN72.004
#define RANGE_LAT_MAX55.8271
#define RANGE_LAT_MIN0.8293
// jzA = 6378245.0, 1/f = 298.3
// b = a * (1 - f)
// ee = (a^2 - b^2) / a^2;
#define jzA6378245.0
#define jzEE 0.00669342162296594323
@implementation LXMapTool
+ (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:ggLatbdLon:ggLon]) {
resPoint.latitude= ggLat;
resPoint.longitude= ggLon;
return resPoint;
}
double dLat = [selftransformLat:(ggLon -105.0)bdLon:(ggLat -35.0)];
double dLon = [selftransformLon:(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 = [selfgcj02Encrypt:gjLatbdLon: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;
doublex = 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.latitudebdLon:location.longitude];
}
+ (CLLocationCoordinate2D)gcj02ToWgs84:(CLLocationCoordinate2D)location{
return [self gcj02Decrypt:location.latitudegjLon:location.longitude];
}
+ (CLLocationCoordinate2D)wgs84ToBd09:(CLLocationCoordinate2D)location{
CLLocationCoordinate2D gcj02Pt = [self gcj02Encrypt:location.latitudebdLon: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
在外界直接调用类方法传入初始经纬度获取到目标经纬度就可以了，如果对你有帮助的话，请帮忙点个赞
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