IOS定位

 #import "ViewController.h"
 #import <CoreLocation/CoreLocation.h>
 @interface ViewController ()<CLLocationManagerDelegate>{
     CLLocationManager *_manager;//位置管理器
 }

 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];

     if ([CLLocationManager locationServicesEnabled]) {

         NSLog(@"允许定位");

         _manager = [[CLLocationManager alloc] init];//初始化

         //判断用户是否选择了位置访问权限
         if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined) {
             //如果尚未选择，则重新弹出请求
             [_manager requestWhenInUseAuthorization];
         }

         //设置代理
         _manager.delegate = self;

         _manager.distanceFilter = ;//设置定位频率多少米访问一次位置

         _manager.desiredAccuracy = kCLLocationAccuracyBest;//定位的精确度
 
/*

extern const CLLocationAccuracy kCLLocationAccuracyBest;//最好的位置精度

extern const CLLocationAccuracy kCLLocationAccuracyNearestTenMeters;最近的10米位置精度

extern const CLLocationAccuracy kCLLocationAccuracyHundredMeters;//几百米的位置精度

extern const CLLocationAccuracy kCLLocationAccuracyKilometer;//几公里

extern const CLLocationAccuracy kCLLocationAccuracyThreeKilometers;//3公里

*/
         [_manager startUpdatingLocation];//开始定位

     //    [self getInfoBuyAddress];

         [self getInfoBuyCoordinate];
     }

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

 -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
     NSLog(@"===%zi---%@",locations.count,locations);

  //   CLLocation *location = [locations firstObject];

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

 }

 //地理编码：根据地址信息，获取其对应的经纬度等信息
 -(void)getInfoBuyAddress{

     CLGeocoder *geo = [[CLGeocoder alloc] init];//初始化编码管理

     //地理编码，传入地址，得到具体信息
     [geo geocodeAddressString:@"郑州科技学院" completionHandler:^(NSArray *placemarks, NSError *error) {

 //        NSLog(@"--错误信息：%@",error);
 //
       //  NSLog(@"---数量:%zi   信息：%@",placemarks.count,placemarks);

         CLPlacemark *place = [placemarks firstObject];

         NSLog(@"经纬度：%f,%f",place.location.coordinate.longitude,place.location.coordinate.latitude);//经纬度
         NSLog(@"街道：%@",place.ocean);

     }];
 }

 //反向地理编码：根据经纬度得到位置信息

 -(void)getInfoBuyCoordinate{
     CLGeocoder *geo = [[CLGeocoder alloc] init];

     CLLocation *location = [[CLLocation alloc] initWithLatitude:34.708517 longitude:113.510850];//通过经纬度定义位置对象

     //传入位置对象，得到对应的地址信息
     [geo reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
         NSLog(@"数量：%zi   反向：%@",placemarks.count,placemarks);

         CLPlacemark *place = [placemarks firstObject];

         NSLog(@"经纬度：%f,%f",place.location.coordinate.longitude,place.location.coordinate.latitude);//经纬度
         NSLog(@"街道：%@",place.ocean);

     }];
 }