iOS定位经纬度，解码所在城市

首先要添加库CoreLocation.framework

然后需要在info.plist里添加两项NSLocationWhenInUseUsageDescription和NSLocationAlwaysUseUsageDescription后边的value随便写点就行

这是询问当前设备是否可以访问位置权限，

 

//

//  ViewController.m

//  Location

//

//  Created by wupeige on 15/12/29.

//  Copyright © 2015年 wupeige. All rights reserved.

 

#import "ViewController.h"

#import <CoreLocation/CoreLocation.h>

 

@interfaceViewController ()<CLLocationManagerDelegate>

@property (strong,nonatomic) CLLocationManager *locationManager;  //定位管理器

@property (strong,nonatomic) CLGeocoder *geo;    //可以根据经度和纬度，解码所在位置

@property (strong,nonatomic) UILabel *lab;

@property (strong,nonatomic) UILabel *lab2;

@property (strong,nonatomic) UILabel *lab3;

@end

 

 

@implementation ViewController

@synthesize lab,lab2,lab3;

 

- (void)viewDidLoad {

    [superviewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    

    lab = [[UILabelalloc] initWithFrame:CGRectMake(100, 100, 300, 50)];

    lab.text = @"经度";

    [self.viewaddSubview:lab];

    

    lab2 = [[UILabelalloc] initWithFrame:CGRectMake(100, 200, 300, 50)];

    lab2.text = @"纬度";

    [self.viewaddSubview:lab2];

    

    lab3 = [[UILabelalloc] initWithFrame:CGRectMake(100, 400, 300, 50)];

    lab3.text = @"城市";

    [self.viewaddSubview:lab3];

    

    UIButton *btn = [[UIButtonalloc] initWithFrame:CGRectMake(150, 50, 100, 50)];

    [btn setTitle:@"定位"forState:UIControlStateNormal];

    [btn setTitleColor:[UIColorredColor] forState:UIControlStateNormal];

    [btn addTarget:selfaction:@selector(Location:) forControlEvents:UIControlEventTouchUpInside];

    [self.viewaddSubview:btn];

    

    

}

-(void) Location:(id) sender

{

//    判断是否可用定位服务

    if ([CLLocationManagerlocationServicesEnabled]) {

        NSLog(@"Star location");

        //设置定位精度  最佳精度

        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;

        

        //设置距离过滤器为10米，表示每移动10米，更新一次数据

        self.locationManager.distanceFilter = 50;

        

        self.locationManager = [[CLLocationManageralloc] init];

        self.geo = [[CLGeocoderalloc] init];

        

 

        

        self.locationManager.delegate = self;

        

        //访问是否可以定位  对应info.plist的文件

        if ([self.locationManagerrespondsToSelector:@selector(requestWhenInUseAuthorization)]) {

            [self.locationManagerrequestWhenInUseAuthorization];

            [self.locationManagerrequestAlwaysAuthorization];

        }

        

        //开始监听位置

        [self.locationManagerstartUpdatingLocation];

        

    }

    else

    {

        NSLog(@"UNSUPPORTED");

    }

}

#pragma mark CLLocationManagerDelegate

 

 

-(void) locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray*)locations

{

    NSLog(@"获取数据啊");

    //获取最后一个定位数据

    CLLocation *location = [locations lastObject];

    

    //依次获取  经度，纬度，高度，速度，方向等

    

    lab2.text = @"ddd";

    

    lab.text = [NSStringstringWithFormat:@"%f",location.coordinate.longitude];

    

    lab2.text = [NSStringstringWithFormat:@"%f",location.coordinate.latitude];

    

    

    __blockNSString *cityName = [[NSStringalloc] init];

 

   //block 回调，在外边拿数据的时候得等回调之后才能拿到，所以对数据的操作写在block回调里

    [self.georeverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {

        CLPlacemark *place = placemarks[0];

        NSLog(@"%@",place.addressDictionary[@"State"]);

        cityName = place.addressDictionary[@"State"];

        cityName = [cityName substringToIndex:cityName.length - 1];

//        NSLog(@"%@",cityName);

        lab3.text = [NSStringstringWithFormat:@"%@",cityName];

    }];

    

    

}

////实时更新数据   立马执行的

//-(void) locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status

//{

//    

//}

-(void) locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error

{

    NSLog(@"Failed");

}

 

- (void)didReceiveMemoryWarning {

    [superdidReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

 

@end