iPhone全球定位系统

Question

我想在objective C中的iPhone上获得我的经度和纬度。有人能指导我如何以编程方式获得这些坐标吗？

#import <Foundation/Foundation.h>

@class CLLocationManager;

@interface CLLocationController : NSObject {
    CLLocationManager *locationManager; 
}

@property (nonatomic, retain) CLLocationManager *locationManager; 

@end

/Hab/Folder/Classes/CLLocationController.m:10:30: error: CLLocationManager.h: No such file or directory
/Hab/Folder/Classes/CLLocationController.m:21: warning: receiver 'CLLocationManager' is a forward class and corresponding @interface may not exist
/Hab/Folder/Classes/CLLocationController.m:22: error: accessing unknown 'delegate' component of a property

Answer 1

使用CLLocationManager，将一个对象设置为代理，然后开始获取更新。

self.locationManager = [[[CLLocationManager alloc] init] autorelease]; 
self.locationManager.delegate = self; 
[self.locationManager startUpdatingLocation]; 

然后实现委托：

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation*)newLocation fromLocation:(CLLocation *)oldLocation { 
  NSLog([NSString stringWithFormat:@"%3.5f", newLocation.coordinate.latitude]); 
  NSLog([NSString stringWithFormat:@"%3.5f", newLocation.coordinate.longitude]); 
}