重要的更改位置不会在iOS 10中触发

Question

重要的更改位置服务不会在iPhone 7 plus上触发，但可以在其他设备上运行。请帮忙 ... 。  我试过以下代码

[appDelegate.locationManager stopUpdatingLocation];
 appDelegate.locationManager=nil;
 appDelegate.locationManager=[[CLLocationManager alloc]init];
 if(IS_OS_8_OR_LATER)
    {
        [appDelegate.locationManager requestAlwaysAuthorization];
    }

    if ([appDelegate.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])
    {
        [appDelegate.locationManager requestAlwaysAuthorization];
        //flag=1;
    }


    appDelegate.locationManager.delegate = appDelegate.self;
    if(IS_OS_9_OR_LATER) {
        appDelegate.locationManager.allowsBackgroundLocationUpdates=YES;
    }
    //appDelegate.locationManager
appDelegate.locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
           appDelegate.locationManager.distanceFilter = 200;


    //locationManager.activityType=CLActivityTypeOtherNavigation;
    appDelegate.locationManager.pausesLocationUpdatesAutomatically=NO;
    [appDelegate.locationManager startMonitoringSignificantLocationChanges];

本规范不适用于iPhone 7 plus，但适用于其他设备和iOS 10操作系统。