iOS

Question

我正在重构旧代码以使事情变得干净，尤其是地理定位部分，现在有点乱。

我正在记录每个地理定位方法，我发现 didUpdateLocations 被调用的时间太多。

这是我的 Splashscreen 中的一些代码：

- (void)viewDidLoad
{
    [super viewDidLoad];

    _locationManager = [[CLLocationManager alloc] init];
    _locationManager.delegate = self;
    [self startLocationRetrieval];
}

这里是startLocationRetrieval方法

   -(void) startLocationRetrieval
    {
        if ([_locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])
            [_locationManager requestWhenInUseAuthorization];
        if ([CLLocationManager locationServicesEnabled]) {
            _locationManager.desiredAccuracy = kCLLocationAccuracyBest;
            [_locationManager startUpdatingLocation];
        }else {
            _isDataLoaded = YES;
            [self loadHomeView];
        }

这是 CLLocation 委托方法

#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    DDLogError(@"GEOLOC CLLocationManager didFailWithError: %@", error);
    [self loadHomeView];
}

- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations
{
    DDLogInfo(@"GEOLOC Splashscreen didUpdateLocations -> %@", locations);
    [self manageNewLocation:[locations lastObject]];
}

以及我处理位置变化的方法

-(void) manageNewLocation:(CLLocation *)location
{
    _coordinate = location;
    DDLogDebug(@"GEOLOC Splash manageNewLocation = %@", _coordinate);
   [self loadHomeView];
}

loadHomeView 方法只是触发performSegueWithIdentifier 以转到HomePage。

您认为这是一个很好的实现还是可以更简洁？
我应该去哪里 stopUpdatingLocation ?

我发现了这个类似的问题 IOS didUpdateLocations。但是 NSTimer 正确的方法吗，它看起来很笨重。

Answer 1

获取位置后，您需要使用 [manager stopUpdatingLocation];

停止更新位置

  - (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations
{
       [manager stopUpdatingLocation];
       manager = nil;
    DDLogInfo(@"GEOLOC Splashscreen didUpdateLocations -> %@", locations);
    [self manageNewLocation:[locations lastObject]];
}

iOS - CLLocation 管理器 didUpdateLocations 调用了太多时间

iOS - CLLocation Manager didUpdateLocations called too much time

objective-c

geolocation

cllocationmanager

cllocation