Objective-C 定位服务问题

Question

我正在尝试制作一个简单的应用程序，它将获得用户的经度和纬度

我按照这里的教程操作：

http://www.appcoda.com/how-to-get-current-location-iphone-user/

随之而来的是：

.h

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>

@interface ViewController : UIViewController <CLLocationManagerDelegate>

@property (strong, nonatomic) IBOutlet UILabel *longitudeLabel;
@property (strong, nonatomic) IBOutlet UILabel *latitudeLabel;
- (IBAction)getCurrentLocation:(id)sender;

@end

.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
{
    CLLocationManager *locationManager;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    locationManager = [[CLLocationManager alloc] init];
}

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

- (IBAction)getCurrentLocation:(id)sender {
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;

    [locationManager startUpdatingLocation];
}

#pragma mark - CLLocationManagerDelegate

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    NSLog(@"didFailWithError: %@", error);

}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"didUpdateToLocation: %@", newLocation);
    CLLocation *currentLocation = newLocation;

    if (currentLocation != nil) {
        _longitudeLabel.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
        _latitudeLabel.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
    }
}
@end

我的问题是 "Would like to use your current location" 弹出窗口。

和 none 的委托方法都被命中了。我在每个委托方法的开头放置了一个断点，什么也没有。请帮忙。

Answer 1

请确保您的 info.plist 中有以下密钥：

NSLocationAlwaysUsageDescription 值为 I need Location
NSLocationWhenInUseUsageDescription 值为 I need Location
privacy - location usage description 值为 I need Location

Answer 2

确保 info.plist 详细信息如前所述，然后在初始化期间添加以下代码；

 if (IS_OS_8_OR_LATER) {
       [locationmanager requestWhenInUseAuthorization];
       //or (as per your app requirement)
       [locationmanager requestAlwaysAuthorization];
    }

Objective-C 定位服务问题

Objective-C issues with location services

objective-c

core-location

ios