CoreLocation获取位置信息简单使用

前言：

项目开发中经常会有获取用户位置的需求，如天气、生活圈、附近的人等

实现：

1、创建一个NSObject类导入 #import

2.在info.plist中加入权限

NSLocationAlwaysUsageDescription （始终，在iOS8-10中使用，iOS11已  Deprecated，官网解析：A message that tells the user why the app is requesting access to the user's location at all times.）

NSLocationWhenInUseUsageDescription（使用应用期间，官网解析：A message that tells the user why the app is requesting access to the user’s location information while the app is running in the foreground.）

NSLocationAlwaysAndWhenInUseUsageDescription（iOS11新增始终获取位置信息 官网解析：A message that tells the user why the app is requesting access to the user’s location information at all times.）

3.在头文件定义location管理类和协议

@interface JCLocation ()

@property (nonatomic, strong) CLLocationManager *locManager;

@property (nonatomic, strong) CLGeocoder *coder; // 反地理编码位置

@end

4.初始化

self.locManager = [[CLLocationManager alloc]init];

self.coder      = [[CLGeocoder alloc]init];

if (@available(iOS 8.0, *)) {   //ios 8需要申请权限

      [self.locManager requestAlwaysAuthorization];        

      [self.locManager requestWhenInUseAuthorization];

}

if (@available(iOS 9.0, *)) {    //iOS9后允许后台刷新

        if ([self.locManager respondsToSelector:@selector(allowsBackgroundLocationUpdates)]) {

          self.locManager.allowsBackgroundLocationUpdates = YES;

}

}

self.locManager.delegate = self;

self.locManager.desiredAccuracy = kCLLocationAccuracyBest;

self.locManager.pausesLocationUpdatesAutomatically = NO; //是否允许自动暂停更新位置默认yes

[self.locManager startUpdatingLocation]; //开始更新位置

5.位置更新后delegate回调

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

{

    if (locations.count > 0) {

        CLLocation *loc = [locations lastObject];

        NSLog(@"lat = %f, long = %f",loc.coordinate.latitude,loc.coordinate.longitude); //至此如果成功就可以打印经纬度信息了

     //以下为反地理编码位置方法，有时候会出现偏差过大，代码中包含WGS84矫正        

        [_coder reverseGeocodeLocation:location    completionHandler:^(NSArray * _Nullable placemarks, NSError * _Nullable error) {

        CLPlacemark *pmark = [placemarks firstObject];

        //CLPlacemark类中包含了国家、地区，城市，街道等详细信息

}];

   }

}

6.定位失败delegate回调

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error

{  

        switch ([error code]) {

            case kCLErrorNetwork:

                    DLog(@"no network...");

                break;

            case kCLErrorDenied:

                    DLog(@"Access to location or ranging has been denied by the user");

                break;

            default:

                break;

       }

} 

7.停止定位

[self.locManager stopUpdatingLocation];

8.注意

[self.locManager startUpdatingLocation] 不要写成了 [self.locManager startUpdatingHeading];

startUpdatingHeading是更新指南针方向的

本文参考Demo