在iOS开发中自动获取当前的位置(GPS定位）

红太狼 2022-08-26 12:15 264阅读 0赞

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][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

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

GPSViewController.m

#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];
       
    }
     #pragma mark locationManager delegate
    
    - (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

[http_download.csdn.net_detail_jingjingxujiayou_7154113]: http://download.csdn.net/detail/jingjingxujiayou/7154113