Question

这是我在 viewDidLoad ：

中的代码

_locationManager = [[CLLocationManager alloc] init];
[_locationManager setDelegate:self];
if ([[UIDevice currentDevice].systemVersion hasPrefix:@"8"]) {
    [_locationManager requestAlwaysAuthorization];
}
[_locationManager startMonitoringSignificantLocationChanges];
[_locationManager setDesiredAccuracy:kCLLocationAccuracyBestForNavigation];

[_locationManager setDistanceFilter:50];
[_locationManager startUpdatingLocation];
[_locationManager startUpdatingHeading];

这就是我的didUpdateLocations方法的样子：

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation* newLocation = [locations lastObject];

    CLLocation* location = [locations lastObject];
    NSDate* eventDate = location.timestamp;
    NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
    if (abs(howRecent) < 50.0 && newLocation.horizontalAccuracy > 0) {
        // If the event is recent, do something with it.
        NSLog(@"latitude %+.6f, longitude %+.6f\n",
              location.coordinate.latitude,
              location.coordinate.longitude);
    }
}

问题是蓝色当前位置点不准确地移动并且不会保持静止。当我静止不动时我会观察到这种行为。我正在尝试过滤 didUpdatelocations 方法中的位置，但我不知道为什么它不起作用。请指导我如何过滤它。或者你认为这种错误的行为是因为别的什么？

Answer 1

您是否尝试过减少setDistanceFilter:50？根据框架参考，这意味着该位置仅在设备移动50米后才更新。默认值为kCLDistanceFilterNone，以通知所有动作。

https://developer.apple.com/library/ios/documentation/CoreLocation/Reference/CLLocationManager_Class/index.html#//apple_ref/occ/instp/CLLocationManager/distanceFilter

CLLocation：蓝色当前位置点意外移动

1 个答案: