定位功能(使用系统地图)

#import "ViewController.h"
#import <CoreLocation/CoreLocation.h>

@interface ViewController ()<CLLocationManagerDelegate>
{
CLLocationManager *_locationManager;
}
@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
//1.创建locationManager
_locationManager = [[CLLocationManager alloc] init];

//2.info.plist文件加入字段
//NSLocationWhenInUseDescription
//NSLocationAlwaysUsageDescription

if (![CLLocationManager locationServicesEnabled]) {
NSLog(@"定位服务未打开");
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"请打开定位服务" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alert show];
}

//3.请求权限(一直允许访问位置信息)
[_locationManager requestAlwaysAuthorization];
//程序运行期间允许访问位置信息
//[_locationManager requestWhenInUseAuthorization];

//4.定位精确度
_locationManager.desiredAccuracy = kCLLocationAccuracyBest;
//设置隔多少米后更新位置信息
_locationManager.distanceFilter = 100;
_locationManager.delegate = self;

//5.开启定位
[_locationManager startUpdatingLocation];
}

#pragma mark --CLLocationManagerDelegate---
//权限状态改变
-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
NSLog(@"%i",status);
//给出相应提示信息
if (status != kCLAuthorizationStatusAuthorizedAlways) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"请设置程序允许访问位置信息" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alert show];
}
else
{
[_locationManager startUpdatingLocation];
}
}
//更新到用户位置信息
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation *location = [locations firstObject];
NSLog(@"%f-%f",location.coordinate.latitude,location.coordinate.longitude);
//反编码
CLGeocoder *geo = [[CLGeocoder alloc] init];
[geo reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
NSLog(@"%@",error);
}];
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end