位置管理器未获取位置

Question

我正在尝试将我的一个应用程序更新到 IOS9 和 Xcode 7.2.1。位置管理器在早期版本中工作，但现在不工作。没有错误或警告......没有。看来我的代码没有达到 "didUpdateLocations"。我的代码在下面；

- (void)setupViewController {

    self.locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)])
    {
        [self.locationManager requestAlwaysAuthorization];
    }

    locationManager.desiredAccuracy = 100;
    //locationManager.requestLocation;
    [locationManager startUpdatingLocation];


    //return coordinate;

    [self performSelector:@selector(stopUpdatingLocation:) withObject:@"Timed Out" afterDelay:5];       

}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    NSLog(@"Doesn't get here.");

    self.bestEffortAtLocation = newLocation;
    latitudeString = [[NSString alloc] initWithFormat:@"%g", newLocation.coordinate.latitude];
    longitudeString = [[NSString alloc] initWithFormat:@"%g", newLocation.coordinate.longitude];

There is other code here that gets city, country, etc.

此时不知道该怎么做。我已经寻找过类似的问题，但没有找到任何东西。

Answer 1

像这样尝试。

- (void)setupViewController
{
    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    self.locationManager.distanceFilter = 100;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;

    [self.locationManager startUpdatingLocation];
    [self.locationManager requestWhenInUseAuthorization];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    self.bestEffortAtLocation = newLocation;
    latitudeString = [[NSString alloc] initWithFormat:@"%g", newLocation.coordinate.latitude];
    longitudeString = [[NSString alloc] initWithFormat:@"%g", newLocation.coordinate.longitude];

    [self.locationManager stopUpdatingLocation];
}

从 setupViewController 中删除您的 performselector 方法，您必须使用所有地方 self。希望对你有帮助。

Answer 2

问题出在这一行：

- (void)locationManager:(CLLocationManager *)manager 
    didUpdateLocations:(CLLocation *)newLocation 
    fromLocation:(CLLocation *)oldLocation {

永远不会调用该方法，因为它对应于 delegate method。你需要实现这个方法：

- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray<CLLocation *> *)locations {

Answer 3

更新您的 info.plist 文件。

<key>NSLocationWhenInUseUsageDescription</key>
<string>This application requires location services to work</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>This application requires location services to work</string>

位置管理器未获取位置

Location Manager not getting location

objective-c

cllocationmanager