#import
#import
@interfaceWGS84TOGCJ02: NSObject
//判断是否已经超出中国范围
+(BOOL)isLocationOutOfChina:(CLLocationCoordinate2D)location;
//转GCJ-02
+(CLLocationCoordinate2D)transformFromWGSToGCJ:(CLLocationCoordinate2D)wgsLoc;
@end
在WGS84TOGCJ02.m文件中：
// Copyright (c) 2013年 swinglife. All rights reserved.
//
#import "WGS84TOGCJ02.h"
constdoublea =6378245.0;
constdoubleee =0.00669342162296594323;
constdoublepi =3.14159265358979324;
@implementationWGS84TOGCJ02
+(CLLocationCoordinate2D)transformFromWGSToGCJ:(CLLocationCoordinate2D)wgsLoc
{
CLLocationCoordinate2D adjustLoc;
if([selfisLocationOutOfChina:wgsLoc]){
adjustLoc = wgsLoc;
}else{
doubleadjustLat = [selftransformLatWithX:wgsLoc.longitude-105.0withY:wgsLoc.latitude-35.0];
doubleadjustLon = [selftransformLonWithX:wgsLoc.longitude-105.0withY:wgsLoc.latitude-35.0];
doubleradLat = wgsLoc.latitude/180.0* pi;
doublemagic = sin(radLat);
magic =1-ee*magic* magic;
doublesqrtMagic = sqrt(magic);
adjustLat = (adjustLat*180.0) / ((a* (1- ee)) / (magic* sqrtMagic) * pi);
adjustLon = (adjustLon*180.0) / (a /sqrtMagic* cos(radLat) * pi);
adjustLoc.latitude= wgsLoc.latitude+ adjustLat;
adjustLoc.longitude= wgsLoc.longitude+ adjustLon;
}
returnadjustLoc;
}
//判断是不是在中国
+(BOOL)isLocationOutOfChina:(CLLocationCoordinate2D)location
{
if(location.longitude<72.004|| location.longitude>137.8347|| location.latitude<0.8293|| location.latitude>55.8271)
returnYES;
returnNO;
}
+(double)transformLatWithX:(double)xwithY:(double)y
{
doublelat = -100.0+2.0* x +3.0* y +0.2*y* y +0.1*x* y +0.2* sqrt(abs(x));
lat += (20.0* sin(6.0*x* pi) +20.0*sin(2.0*x* pi)) *2.0/3.0;
lat += (20.0* sin(y* pi) +40.0* sin(y /3.0* pi)) *2.0/3.0;
lat += (160.0* sin(y /12.0* pi) +320* sin(y* pi /30.0)) *2.0/3.0;
returnlat;
}
+(double)transformLonWithX:(double)xwithY:(double)y
{
doublelon =300.0+ x +2.0* y +0.1*x* x +0.1*x* y +0.1* sqrt(abs(x));
lon += (20.0* sin(6.0*x* pi) +20.0* sin(2.0*x* pi)) *2.0/3.0;
lon += (20.0* sin(x* pi) +40.0* sin(x /3.0* pi)) *2.0/3.0;
lon += (150.0* sin(x /12.0* pi) +300.0* sin(x /30.0* pi)) *2.0/3.0;
returnlon;
}
@end
-(void)locationManager:(CLLocationManager*)managerdidUpdateLocations:(NSArray*)locations{
//得到newLocation
CLLocation*loc = [locationsobjectAtIndex:0];
//判断是不是属于国内范围
if(![WGS84TOGCJ02isLocationOutOfChina:[loccoordinate]]) {
//转换后的coord
CLLocationCoordinate2D coord = [WGS84TOGCJ02transformFromWGSToGCJ:[loccoordinate]];
}