定位的系统实现简单方法

1、导入头文件：#import <CoreLocation/CoreLocation.h>

2、遵循代理：CLLocationManagerDelegate

3、初始化变量： CLLocationManager *_locationManager;

                       CLGeocoder *_geocoder;

4、实现代码：

-(void)viewWillAppear:(BOOL)animated
{
    //定位管理器
    _locationManager=[[CLLocationManager alloc]init];
    
    _geocoder=[[CLGeocoder alloc]init];
    
    if (![CLLocationManager locationServicesEnabled]) {
        NSLog(@"定位服务当前可能尚未打开，请设置打开！");
        return;
    }
    
    //如果没有授权则请求用户授权
    if ([CLLocationManager authorizationStatus]==kCLAuthorizationStatusNotDetermined){
        [_locationManager requestWhenInUseAuthorization];
    }else if([CLLocationManager authorizationStatus]==kCLAuthorizationStatusAuthorizedWhenInUse){
        //设置代理
        _locationManager.delegate=self;
        //设置定位精度
        _locationManager.desiredAccuracy=kCLLocationAccuracyBest;
        //定位频率,每隔多少米定位一次
        CLLocationDistance distance=10.0;//十米定位一次
        _locationManager.distanceFilter=distance;
        //启动跟踪定位
        [_locationManager startUpdatingLocation];
    }
    
    
}

#pragma mark - CoreLocation 代理
#pragma mark 跟踪定位代理方法，每次位置发生变化即会执行（只要定位到相应位置）
//可以通过模拟器设置一个虚拟位置，否则在模拟器中无法调用此方法
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
    CLLocation *location=[locations firstObject];//取出第一个位置
    CLLocationCoordinate2D coordinate=location.coordinate;//位置坐标
    NSLog(@"经度：%f,纬度：%f,海拔：%f,航向：%f,行走速度：%f",coordinate.longitude,coordinate.latitude,location.altitude,location.course,location.speed);
    
    [self  getAddressByLatitude:coordinate.latitude longitude:coordinate.longitude];
    
    //如果不需要实时定位，使用完即使关闭定位服务
    [_locationManager stopUpdatingLocation];
}


#pragma mark 根据坐标取得地名
-(void)getAddressByLatitude:(CLLocationDegrees)latitude longitude:(CLLocationDegrees)longitude{
    
    //反地理编码
    CLLocation *location=[[CLLocation alloc]initWithLatitude:latitude longitude:longitude];
    [_geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
        CLPlacemark *placemark=[placemarks firstObject];
        NSLog(@"详细信息:%@",placemark.addressDictionary);
        cityString = [placemark.addressDictionary objectForKey:@"City"];
        NSLog(@"%@",cityString);
        dizhiLable.adjustsFontSizeToFitWidth = YES;
        dizhiLable.text = cityString;
    }];
    
}