ios - CLLocation 当前位置不工作

Question

我的类 ViewController 中有这段代码:

CLLocationManager *locationManager;

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

    locationManager = [[CLLocationManager alloc] init];
    [locationManager requestWhenInUseAuthorization];
}


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

    [locationManager startUpdatingLocation];
}

#pragma mark - CLLocationManagerDelegate

-(void) locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    NSLog(@"Did finish with error - %@", error);
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Failed to get your location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    [alert show];
}

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

    NSLog(@"did Update Location - %@", newLocation);
    CLLocation *currentLocation = newLocation;

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

但我没有获取允许访问的位置或弹出窗口。

我正在使用 Core Location 框架。

单击按钮时，我正在标签中打印纬度、经度和地址。

我正在模拟器上测试这个。

Answer 1

有时模拟器无法与启用位置的服务一起使用 Apple Device 进行完美测试。

在您的 info.plist 文件中添加以下键以获取允许访问弹出窗口。

或将它们添加为更新 info.plist 文件源代码。

<key>NSLocationAlwaysUsageDescription</key>
<string>message for location uses</string>

<key>NSLocationWhenInUseUsageDescription</key>
<string>message for location uses</string>