CLLocationManager定位功能

你的名字 2022-04-17 01:11 294阅读 0赞

iOS开发中使用原生地图`CLLocationManager`进行定位功能的开发。

使用示例  
1、导入头文件

#import <CoreLocation/CoreLocation.h>

2、实例化

- (CLLocationManager *)locationManager
    { 
        if (_locationManager == nil) { 
            _locationManager = [[CLLocationManager alloc] init];
            _locationManager.delegate = self;
            _locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
            _locationManager.distanceFilter = 100.0f;
        }
        return _locationManager;
    }

3、开始定位，或停止定位

- (void)startLocation
    { 
        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) { 
            [self.locationManager requestWhenInUseAuthorization];
        }
        
        // 持续使用定位服务
        if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) { 
            [self.locationManager requestAlwaysAuthorization]; // 永久授权
            [self.locationManager requestWhenInUseAuthorization]; //使用中授权
        }
        [self.locationManager startUpdatingLocation];
    }
    
    - (void)stopLocation
    { 
        [self.locationManager stopUpdatingLocation];
    }

4、实现协议`CLLocationManagerDelegate`的代理方法

// 定位成功
    - (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
    { 
        CLLocation *location = [locations lastObject];
        NSLog(@"%f, %f",location.coordinate.latitude, location.coordinate.longitude);
        [self stopLocation];
    }
    
    // 定位失败
    - (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
    { 
        NSLog(@"%@", error);
    }

5、反编码，即根据经纬度解析

// 反编码
    - (void)requestGeocodeWithLocation:(CLLocation *)location
    { 
        // 创建编码对象
        CLGeocoder *geocoder = [[CLGeocoder alloc] init];
        // 反地理编码
        [geocoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) { 
            if (error != nil || placemarks.count == 0) { 
                return ;
            }
            // 获取地标
            CLPlacemark *placeMark = [placemarks firstObject];
            NSLog(@"%@, %@, %@", placeMark, placeMark.locality, placeMark.name);
        }];
    }