iOS系统自带的定位服务可以实现很多需求。比如：获取当前经纬度，获取当前位置信息等等。获取当前经纬度首先导入#import <CoreLocation/CoreLocation.h>，定义CLLocationManager的实例，实现CLLocationManagerDelegate。@interface ViewController ()<CLLocationManagerDelegate>{CLLocationManager *_locationManager;}@end开始定位的方法：- (void)startLocating{if([CLLocationManager locationServicesEnabled]){_locationManager = [[CLLocationManager alloc] init];//设置定位的精度[_locationManager setDesiredAccuracy:kCLLocationAccuracyBest];_locationManager.distanceFilter = 100.0f;_locationManager.delegate = self;if ([[[UIDevice currentDevice] systemVersion] floatValue] > 8.0){[_locationManager requestAlwaysAuthorization];[_locationManager requestWhenInUseAuthorization];}//开始实时定位[_locationManager startUpdatingLocation];}}实现代理方法：-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{NSLog(@"Longitude = %f", manager.location.coordinate.longitude);NSLog(@"Latitude = %f", manager.location.coordinate.latitude);[_locationManager stopUpdatingLocation];}获取当前位置信息在上面的代理方法中-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{NSLog(@"Longitude = %f", manager.location.coordinate.longitude);NSLog(@"Latitude = %f", manager.location.coordinate.latitude);[_locationManager stopUpdatingLocation];CLGeocoder * geoCoder = [[CLGeocoder alloc] init];[geoCoder reverseGeocodeLocation:manager.location completionHandler:^(NSArray *placemarks, NSError *error) {for (CLPlacemark * placemark in placemarks) {NSDictionary *test = [placemark addressDictionary];// Country(国家) State(城市) SubLocality(区)NSLog(@"%@", [test objectForKey:@"Country"]);NSLog(@"%@", [test objectForKey:@"State"]);NSLog(@"%@", [test objectForKey:@"SubLocality"]);NSLog(@"%@", [test objectForKey:@"Street"]);}}];}这样就很简单获取了当前位置的详细信息。
获取某一个地点的经纬度
– (void)getLongitudeAndLatitudeWithCity:(NSString *)city{//city可以为中文NSString *oreillyAddress = city;CLGeocoder *myGeocoder = [[CLGeocoder alloc] init];[myGeocoder geocodeAddressString:oreillyAddress completionHandler:^(NSArray *placemarks, NSError *error) {if ([placemarks count] > 0 && error == nil){NSLog(@"Found %lu placemark(s).", (unsigned long)[placemarks count]);CLPlacemark *firstPlacemark = [placemarks objectAtIndex:0];NSLog(@"Longitude = %f", firstPlacemark.location.coordinate.longitude);NSLog(@"Latitude = %f", firstPlacemark.location.coordinate.latitude);}else if ([placemarks count] == 0 && error == nil){NSLog(@"Found no placemarks.");}else if (error != nil){NSLog(@"An error occurred = %@", error);}}];}计算两个地点之间的距离- (double)distanceByLongitude:(double)longitude1 latitude:(double)latitude1 longitude:(double)longitude2 latitude:(double)latitude2{CLLocation* curLocation = [[CLLocation alloc] initWithLatitude:latitude1 longitude:longitude1];CLLocation* otherLocation = [[CLLocation alloc] initWithLatitude:latitude2 longitude:longitude2];double distance = [curLocation distanceFromLocation:otherLocation];//单位是mreturn distance;}首先我们可以用上面的getLongitudeAndLatitudeWithCity方法获取某一个地点的经纬度。比如我们获取北京和上海的经纬度分别为：北京Longitude = 116.405285，，Latitude = 39.904989 上海Longitude = 121.472644， Latitude = 31.231706, 那么北京和上海之间的距离就是： double distance = [self distanceByLongitude:116.405285 latitude:39.904989 longitude:121.472644 latitude:31.231706];NSLog(@"Latitude = %f", distance);计算的是大概的距离，可能没有那么精准。输入结果为：distance = 1066449.749194代码下载地址: https://github.com/worldligang/MapDistanceMaster.git更多iOS技术请关注微信iOS开发iOSDevTip
有多远，走多远，把足迹连成生命线。
