iOS定位服务 CoreLocation

// 在iOS中，定位服务API主要使用CoreLocation框架，
/*
CLLocationManager 用于定位服务管理类，它能够给我们提供位置信息和高度信息，也可以监控设备进入或离开某个区域，还可以或得设备的运行方向等。
CLLocationManagerDelegate CLLocationManager 类的委托协议。
CLLocation 改类封装了位置和高度信息

打开定位服务：设置->隐私->定位服务->XX 应用
*/

// 1、导入CoreLocation 框架
#import <CoreLocation/CoreLocation.h>

// 2、遵守 协议
@interface OnePositionViewController ()<CLLocationManagerDelegate>
{
// 3、定义了CLLocationManager 属性
CLLocationManager *_manager;
CLGeocoder *_geocoder;

}

@property (nonatomic,strong)CLGeocoder *geocoder;
@property (weak, nonatomic) IBOutlet UILabel *latLabel;
@property (weak, nonatomic) IBOutlet UILabel *lngLabel;
@property (weak, nonatomic) IBOutlet UILabel *altLabel;
@property (weak, nonatomic) IBOutlet UILabel *locationLabel;

@end

@implementation OnePositionViewController

-(CLGeocoder *)geocoder{
if (!_geocoder) {
_geocoder = [[CLGeocoder alloc] init];
}

return _geocoder;

}

- (void)viewDidLoad {
[super viewDidLoad];

self.title = @"地理定位和地理信息反编码";

if (![CLLocationManager locationServicesEnabled]) {
NSLog(@"用户关闭了定位");

return;
}
// 创建并初始化locationManager 属性，
_manager = [[CLLocationManager alloc] init];

_manager.delegate = self;

// 精确度  精确度越高，请求获得位置信息的时间就越短，设备越耗电
/*
kCLLocationAccuracyBestForNavigation   导航情况下最高的精确度，一般有外接电源时才能使用 （车载导航）
kCLLocationAccuracyBest;               设备使用电池供应时最高的精确度。
kCLLocationAccuracyNearestTenMeters;   精确到10米
kCLLocationAccuracyHundredMeters;      精确到100米 （徒步旅行者的应用）
kCLLocationAccuracyKilometer;          精确到1000米
kCLLocationAccuracyThreeKilometers;    精确到3000米
*/
_manager.desiredAccuracy = kCLLocationAccuracyBest;

// 设置距离过滤器，定义了设备移动后获得位置信息的最小距离。单位是米
_manager.distanceFilter = 1000.0f;

// 弹出用户授权提示框  修改工程配置文件   NSLocationAlwaysUsageDescription 和 NSLocationWhenInUseUsageDescription.
if ([_manager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
[_manager requestAlwaysAuthorization];
}
// 开始定位，也可以放在 viewWillAppear 中调用，在
[_manager startUpdatingLocation];

}

//- (void)viewWillAppear:(BOOL)animated{
//    [super viewWillAppear:animated];
//
//    // 开始定位
//    [_manager startUpdatingLocation];
//}
//
//- (void)viewWillDisappear:(BOOL)animated{
//    [super viewDidAppear:animated];
//    // 停止定位
//    [_manager stopUpdatingLocation];
//}

#pragma mark -------- 授权状态发生变化时调用
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
switch (status) {

case kCLAuthorizationStatusNotDetermined:

if ([manager respondsToSelector:@selector(requestAlwaysAuthorization)]) {

[manager requestWhenInUseAuthorization];
}

break;
default:
break;
}
}

#pragma mark - ------------ 定位成功
- (void)locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray<CLLocation *> *)locations{

//    NSLog(@"locations = %@",locations);

CLLocation *location = locations.lastObject;

NSLog(@"经度：%f",location.coordinate.latitude);
NSLog(@"纬度：%f",location.coordinate.longitude);
NSLog(@"高度：%f",location.altitude);

self.latLabel.text = [NSString stringWithFormat:@"经度：%f",location.coordinate.latitude];
self.lngLabel.text = [NSString stringWithFormat:@"纬度：%f",location.coordinate.longitude];
self.altLabel.text = [NSString stringWithFormat:@"高度：%f",location.altitude];
//    location.coordinate.latitude
//    location.coordinate.longitude

//根据经纬度解析地理位置

[self.geocoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
if (!error) {
CLPlacemark *placemark = placemarks[0];
NSLog(@"address = %@",placemark.addressDictionary);

NSDictionary *addressDictionary = placemark.addressDictionary;
// 国家
NSString *address = addressDictionary[@"Country"];
// 省份
NSString *addressState = addressDictionary[@"State"];
// 城市
NSString *addressCity = addressDictionary[@"City"];
// 区域
NSString *addressSubLocality = addressDictionary[@"SubLocality"];
// 街道
NSString *addressThoroughfare = addressDictionary[@"Thoroughfare"];

self.locationLabel.text = [NSString stringWithFormat:@"%@ %@ %@ %@ %@",address,addressState,addressCity,addressSubLocality,addressThoroughfare];
//
//            for (NSString *key in placemark.addressDictionary.allKeys) {
//                NSLog(@"%@:%@",key,placemark.addressDictionary[key]);
//            }

[_manager stopUpdatingLocation];
}else{
NSLog(@"error:%@",error);
}

}];
}

#pragma mark ------- 定位失败
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error{
NSLog(@"error :%@",error);

}