iOS开发中自动获取当前位置（GPS定位）

在iOS开发中自动获取当前的位置(GPS定位)

代码的下载连接http://download.csdn.net/detail/jingjingxujiayou/7154113

开发环境 xcode5.0

首先我们要引入这个框架CoreLocation.framework

将这个库引进来#import <CoreLocation/CoreLocation.h>

还有他的代理方法 CLLocationManagerDelegate

GPSViewController.h

注意这里的CLLocationManager* locationmanager要设置成全局变量，要不然得不到你想要的结果哦！具体为什么，我现在还不清楚

Java

123456

#import <UIKit/UIKit.h>#import <CoreLocation/CoreLocation.h>@interface GPSViewController : UIViewController<CLLocationManagerDelegate> @property(nonatomic,retain) CLLocationManager* locationmanager;@end

GPSViewController.mJava

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#import "GPSViewController.h" @interface GPSViewController () @end @implementation GPSViewController @synthesize locationmanager; - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. locationmanager = [[CLLocationManager alloc]init]; //设置精度 /* kCLLocationAccuracyBest kCLLocationAccuracyNearestTenMeters kCLLocationAccuracyHundredMeters kCLLocationAccuracyHundredMeters kCLLocationAccuracyKilometer kCLLocationAccuracyThreeKilometers */ //设置定位的精度 [locationmanager setDesiredAccuracy:kCLLocationAccuracyBest]; //实现协议 locationmanager.delegate = self; NSLog(@"开始定位"); //开始定位 [locationmanager startUpdatingLocation]; } - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { NSLog(@"hello"); //打印出精度和纬度 CLLocationCoordinate2D coordinate = newLocation.coordinate; NSLog(@"输出当前的精度和纬度"); NSLog(@"精度：%f 纬度：%f",coordinate.latitude,coordinate.longitude); //停止定位 [locationmanager stopUpdatingLocation]; //计算两个位置的距离 float distance = [newLocation distanceFromLocation:oldLocation]; NSLog(@" 距离 %f",distance); } @end