Xcode 6为什么CLLocationManager不返回纬度和经度

林子勤

为什么我可以获得方向但我无法获得经度和纬度？我是否需要获得用户的位置信息许可并写入我的代码？

这是我的代码

#import "ViewController.h"

@interface ViewController ()<CLLocationManagerDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    [self.locationManager startMonitoringSignificantLocationChanges];

    [self.locationManager startUpdatingLocation];
    [self.locationManager startUpdatingHeading];

// Do any additional setup after loading the view, typically from a nib.
}
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    [self.locationManager stopUpdatingLocation];
    self.Lat.text = [NSString stringWithFormat:@"%f", manager.location.coordinate.latitude];
    NSLog(@"%f",manager.location.coordinate.longitude);
    self.Long.text = [NSString stringWithFormat:@"%f", manager.location.coordinate.longitude];
}

-(void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading {
    self.Mag_heading.text = [NSString stringWithFormat:@"%f",newHeading.magneticHeading];
    self.True_heading.text = [NSString stringWithFormat:@"%f", newHeading.trueHeading];
}

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

林子勤

配置完成后，必须针对iOS 8“启动”位置管理器，需要特定的用户级别权限，“使用时”授权将授予对用户重要位置的访问权限：请确保在您的应用中包括NSLocationWhenInUseUsageDescription以及其说明字符串Info.plist或startUpdatingLocation将不起作用。

if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) 
{
    [self.locationManager requestWhenInUseAuthorization];
}

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