ios - 注册区域 ios 时是否需要 startLocationUpdates？

Question

在我的应用程序中，我注册了一些 CLRegion。我的全部功能在于这些功能:

- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region {
    NSLog(@"Entered Region - %@", region.identifier);
    [self showRegionAlert:@"Entering Region" forRegion:region.identifier];
}

- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region {
    NSLog(@"Exited Region - %@", region.identifier);
    [self showRegionAlert:@"Exiting Region" forRegion:region.identifier];
}

- (void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region {
    NSLog(@"Started monitoring %@ region", region.identifier);
}

这个函数存在于我的代码中，但我没有在这里做任何事情:

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"Location Update:%@",[NSString stringWithFormat:@"%f,%f",newLocation.coordinate.latitude, newLocation.coordinate.longitude]);
}

我的问题是:

这个初始化是必要的吗？

- (void)initializeLocationUpdates {
    [_locationManager startUpdatingLocation];
}

当您只想考虑区域时？

Answer 1

不，但是您必须为每个要监视的区域调用 startMonitoringForRegion:。像这样:

CLRegion *region = // Set up your region
self.locationManager.delegate = self; // Make sure you are set as the location manager's delegate
[self.locationManager startMonitoringForRegion: region]; // Start monitoring the region

请参阅 this page 上的 startMonitoringForRegion: 文档