ios CoreLocation定位服务

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

@interface ViewController ()<CLLocationManagerDelegate>
/**
 *  定位管理者
 */
@property (nonatomic ,strong) CLLocationManager *mgr;
@end

@implementation ViewController

// 懒加载
// 创建CoreLocation管理者
- (CLLocationManager *)mgr
{
    if (!_mgr) {
        _mgr = [[CLLocationManager alloc] init];
    }
    return _mgr;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 设置代理监听获取到的位置
    self.mgr.delegate = self;

    // 判断是否是iOS8
    if([[UIDevice currentDevice].systemVersion doubleValue] >= 8.0)
    {
        NSLog(@"是iOS8");
        // 主动要求用户对我们的程序授权, 授权状态改变就会通知代理
        [self.mgr requestAlwaysAuthorization]; 
    }else
    {
       // 开始监听(开始获取位置)
        [self.mgr startUpdatingLocation];
    }
    
}

// 授权状态发生改变时调用
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
   if (status == kCLAuthorizationStatusNotDetermined) {
        NSLog(@"等待用户授权");
    }else if (status == kCLAuthorizationStatusAuthorizedAlways ||
              status == kCLAuthorizationStatusAuthorizedWhenInUse)
        
    {
        NSLog(@"授权成功");
        // 开始定位
        [self.mgr startUpdatingLocation];
        
    }else
    {
        NSLog(@"授权失败");
    }
}

#pragma mark - CLLocationManagerDelegate
//  获取到位置信息之后就会调用(调用频率非常高)
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    // 定位的信息
    // CLLocation *location = [locations lastObject];
   
    
}