1. 导入框架
Xcode中添加“CoreLocation.framework”
 Xcode中添加“CoreLocation.framework”
  1. 导入主头文件
#import <CoreLocation/CoreLocation.h>
 #import <CoreLocation/CoreLocation.h>
  1. 声明管理器和代理
@interface ViewController ()<CLLocationManagerDelegate>
 @property (nonatomic, strong) CLLocationManager* locationManager;
 @end
  1. 初始化管理器
self.locationManager = [[CLLocationManager alloc] init];
 self.locationManager.delegate = self;
 self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
  1. 开启定位服务,需要定位时调用findMe方法:
- (void)findMe
 {
     /** 由于IOS8中定位的授权机制改变 需要进行手动授权
      * 获取授权认证,两个方法:
      * [self.locationManager requestWhenInUseAuthorization];
      * [self.locationManager requestAlwaysAuthorization];
      */
     if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
         NSLog(@"requestAlwaysAuthorization");
         [self.locationManager requestAlwaysAuthorization];
     }

     //开始定位,不断调用其代理方法
     [self.locationManager startUpdatingLocation];
     NSLog(@"start gps");
 }
  1. 代理设置
- (void)locationManager:(CLLocationManager *)manager
      didUpdateLocations:(NSArray *)locations
 {
     // 1.获取用户位置的对象
     CLLocation *location = [locations lastObject];
     CLLocationCoordinate2D coordinate = location.coordinate;
     NSLog(@"纬度:%f 经度:%f", coordinate.latitude, coordinate.longitude);

     // 2.停止定位
     [manager stopUpdatingLocation];
 }

 - (void)locationManager:(CLLocationManager *)manager
        didFailWithError:(NSError *)error
 {
     if (error.code == kCLErrorDenied) {
         // 提示用户出错原因,可按住Option键点击 KCLErrorDenied的查看更多出错信息,可打印error.code值查找原因所在
     }
 }

注意事项

  1. iOS8中定位服务的变化:CLLocationManager协议方法不响应,无法回掉GPS方法,不出现获取权限提示,解决方法如下,详见1详见2
如果需要仅在前台定位,你在调用startUpdatingLocation 前需要调用requestWhenInUseAuthorization(见设置步骤6)  

 如果需要在前后台定位,你在调用startUpdatingLocation 前需要调用requestAlwaysAuthorization  

 在plist文件中添加NSLocationWhenInUseUsageDescription或(与)NSLocationAlwaysUsageDescription字段:  
 找到info.plist文件->右击->Open As->Source Code->在尾部的</dict>标签之前添加以下一个或两个:  
 <key>NSLocationWhenInUseUsageDescription</key><string>需要定位</string>  
 <key>NSLocationAlwaysUsageDescription</key><string>需要定位</string>
  1. 用户隐私的保护
从iOS 6开始,苹果在保护用户隐私方面做了很大的加强,以下操作都必须经过用户批准授权:要想获得用户的位置,想访问用户的通讯录、日历、相机、相册等;当想访问用户的隐私信息时,系统会自动弹出一个对话框让用户授权。

 可以在Info.plist中设置NSLocationUsageDescription说明定位的目的(Privacy - Location Usage Description)

 从iOS 8开始,用户定位分两种情况  
 总是使用用户位置:NSLocationAlwaysUsageDescription  
 使用应用时定位:NSLocationWhenInUseDescription  
 当想访问用户的隐私信息时,系统会自动弹出一个对话框让用户授权

 /**
  *打开定位服务
  *需要在info.plist文件中添加(以下二选一,两个都添加默认使用NSLocationWhenInUseUsageDescription):
  *NSLocationWhenInUseUsageDescription 允许在前台使用时获取GPS的描述
  *NSLocationAlwaysUsageDescription 允许永远可获取GPS的描述
  1. 获取当前软件的定位服务状态
if ([CLLocationManager locationServicesEnabled]  //确定用户的位置服务启用  
 &&[CLLocationManager authorizationStatus]==kCLAuthorizationStatusDenied)  
 //位置服务是在设置中禁用  
     {  

     }
  1. 代码:调用startLocation方法即可
#pragma mark Location and Delegate
    - (void)startLocation
    {
        self.locationManager = [[CLLocationManager alloc] init];
        self.locationManager.delegate = self;
        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;

        /** 由于IOS8中定位的授权机制改变 需要进行手动授权
         * 获取授权认证,两个方法:
         * [self.locationManager requestWhenInUseAuthorization];
         * [self.locationManager requestAlwaysAuthorization];
         */
        if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
            NSLog(@"requestWhenInUseAuthorization");
            //        [self.locationManager requestWhenInUseAuthorization];
            [self.locationManager requestAlwaysAuthorization];
        }


        //开始定位,不断调用其代理方法
        [self.locationManager startUpdatingLocation];
        NSLog(@"start gps");
    }

    - (void)locationManager:(CLLocationManager *)manager
         didUpdateLocations:(NSArray *)locations
    {
        // 1.获取用户位置的对象
        CLLocation *location = [locations lastObject];
        CLLocationCoordinate2D coordinate = location.coordinate;
        NSLog(@"纬度:%f 经度:%f", coordinate.latitude, coordinate.longitude);

        self.longitute = [NSNumber numberWithDouble:coordinate.longitude];
        self.latitude = [NSNumber numberWithDouble:coordinate.latitude];

        // 2.停止定位
        [manager stopUpdatingLocation];
    }

    - (void)locationManager:(CLLocationManager *)manager
           didFailWithError:(NSError *)error
    {
        if (error.code == kCLErrorDenied) {
            // 提示用户出错原因,可按住Option键点击 KCLErrorDenied的查看更多出错信息,可打印error.code值查找原因所在
        }
    }