不能通過Corelocation找到位置

Question

我使用corelocation來檢測要在URL中使用的緯度和經度，但是日志中的打印結果均為0.00000

這是我的代碼

mapViewcontroller.m

#import <CoreLocation/CoreLocation.h>

@interface mapsViewController () <CLLocationManagerDelegate>

@property (weak, nonatomic) IBOutlet UIWebView *mapsweb;
@property(weak,nonatomic) CLLocationManager *locationmanager;
@end

@implementation mapsViewController

-(NSString *)getlat{
    return [NSString stringWithFormat:@"%f",_locationmanager.location.coordinate.latitude];
}
-(NSString *)getlon{
    return [NSString stringWithFormat:@"%f",_locationmanager.location.coordinate.longitude];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    _locationmanager = [[CLLocationManager alloc]init];
    _locationmanager.distanceFilter = kCLDistanceFilterNone;
    _locationmanager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
    [_locationmanager startUpdatingLocation];

    NSString *t1 = @"http://mymaps.com/clat/";
    NSString *la = [self getlat];
    NSString *t2 = @"/clng/";
    NSString *lo = [self getlon];

    NSLog(@"latitude is %@",[self getlat]);
    NSLog(@"Longitude is %@",[self getlon]);

Answer 1

您沒有使用requestWhenInUseAuthorization或requestAlwaysAuthorization

還請與以下代表核實-

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {

}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
}

Answer 2

您是否在Info.plist中添加了NSLocationWhenInUseUsageDescription？ 如果不是，則添加此屬性並將其類型設置為String，值= requestWhenInUseAuthorization