iOS 地图与定位的简单使用

ios地图与定位的简单使用

1. 实现地图、导航功能，每每须要先熟悉定位功能，在iOS中经过Core Location框架进行定位操做。Core Location自身能够单独使用，和地图开发框架MapKit彻底是独立的，可是每每地图开发要配合定位框架使用。在Core Location中主要包含了定位、地理编码（包括反编码）功能。

2. 代码以下:

   #import "ViewController.h"
          #import <CoreLocation/CoreLocation.h>
   
          @interface ViewController ()<CLLocationManagerDelegate>
          /**声明全局变量(记住缘由)  要懒加载**/
          @property(nonatomic,strong)CLLocationManager *LM;
          @end
   
          @implementation ViewController {
          CLLocation  *_location;
         }
         //懒加载
         -(CLLocationManager *)LM {
         if (!_LM) {
        _LM = [[CLLocationManager alloc]init];
        //代理
        _LM.delegate = self;
        [_LM requestAlwaysAuthorization];
        _LM.distanceFilter = 0.1;
        //定位最准确,耗电最快
        _LM.desiredAccuracy = kCLLocationAccuracyBest;
       }
       return _LM;
        }
      - (void)viewDidLoad {
    [super viewDidLoad];
   
       }
       //手势点击更新定位
      -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent     *)event{
        [self.LM startUpdatingLocation];
    }
      //代理事件
      -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
        CLLocation *locationsw= [locations firstObject];
         //    NSLog(@"%@",locationsw);
        /* 例如:”北偏东30度方向,移动了8米”
         实现步骤:
         1> 获取对应的方向偏向(例如”正东””东偏南”)
         2> 获取对应的偏离角度(并判断是不是正方向)
         3> 计算行走距离
         4> 打印信息
         */
        NSString *course = nil;
        switch ((int)locationsw.course /90) {
            case 0:
                course = @"北偏东 ";
                break;
            case 1:
                course = @"东偏南";
                break;
            case 2:
                course = @"南偏西";
                break;
            case 3:
                course = @"西偏北";
            default:
                break;
        }
        //度数
        NSString *degree = nil;
        degree = [NSString stringWithFormat:@"%d度",(int)locationsw.course%90];
        //距离
        NSString *distant = nil;
        if (_location) {
           distant = [NSString stringWithFormat:@"%f",[locationsw distanceFromLocation:_location]];
   
        }
       _location  =locationsw;
        NSLog(@"xiaoming %@%@移动%@",course,degree,distant);
   
    }

3. 注意: 在Info.plist文件中添加以下配置：
   • NSLocationAlwaysUsageDescription
   • NSLocationWhenInUseUsageDescription