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iOS获取用户位置信息

iOS获取用户位置信息

作者: 摘心 | 来源:发表于2019-03-20 14:00 被阅读0次

    1.导入系统框架

    import <CoreLocation/CoreLocation.h>

    实现CLLocationManagerDelegate协议
    声明位置管理对象属性
    @property (nonatomic, strong) CLLocationManager *locationManager;
    2.初始化CLLocationManager对象获取位置信息

    -(void)initLocation
    {
        _locationManager = [[CLLocationManager alloc] init];
        _locationManager.delegate = self;
        // 设置定位精度
        [_locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
        // 请求用户权限:
        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8) {
           // 只在前台开启定位
            [_locationManager requestWhenInUseAuthorization];
                     // 在后台也可定位
            //        [_locationManager requestAlwaysAuthorization];
        }
        //    更新用户位置
        [_locationManager startUpdatingLocation];
    }
    

    3.定位权限变化通知

    -(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
    {
        switch (status) {
            case kCLAuthorizationStatusNotDetermined:
            {
                if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
                    [self.locationManager requestAlwaysAuthorization];
                }
                NSLog(@"用户还未决定授权");
                break;
            }
            case kCLAuthorizationStatusRestricted:
            {
                NSLog(@"访问受限");
                // 通过 ip 获取位置信息
                break;
            }
            case kCLAuthorizationStatusDenied:
            {
                // 类方法,判断是否开启定位服务
                if ([CLLocationManager locationServicesEnabled]) {
                    NSLog(@"定位服务开启,被拒绝");
                    
                } else {
                    NSLog(@"定位服务关闭,不可用");
                }
                break;
            }
            case kCLAuthorizationStatusAuthorizedAlways:
            {
    //            NSLog(@"获得前后台授权");
                break;
            }
            case kCLAuthorizationStatusAuthorizedWhenInUse:
            {
    //            NSLog(@"获得前台授权");
                break;
            }
            default:
                break;
        }
    }
    

    4.用户位置信息变化回调

    -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations  {
        if (locations && [locations count] > 0) {
            CLLocation *newLocation = locations[0];
            //CLLocationCoordinate2D oldCoordinate = newLocation.coordinate;
            [manager stopUpdatingLocation];
            CLGeocoder *geocoder = [[CLGeocoder alloc]init];
            [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
                if (placemarks && [placemarks count] > 0) {
                    // 纬度
                    CLLocationDegrees latitude = newLocation.coordinate.latitude;
                    // 经度
                    CLLocationDegrees longitude = newLocation.coordinate.longitude;
                    NSString *cityName = @"火星";
                    for (CLPlacemark *place in placemarks) {
                        if (place.locality.length > 0) {
                            cityName = place.locality;
                        }
                    }
                }
            }];
        }
    }
    

    5.如果用户拒绝访问位置信息,这时可以通过访问淘宝 ip 获取ip地址信息
    http://ip.taobao.com/service/getIpInfo.php?ip=myip

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