如何在 ios 中显示距离用户当前位置 20 公里附近的朋友的位置

Question

我想获取我附近朋友的位置 20km.App 应该跟踪我的当前位置，当我想搜索 20 公里以内的朋友时，它应该在地图上显示我所有朋友的位置。

locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];

 -(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
NSLog(@"OldLocation %f %f", oldLocation.coordinate.latitude, oldLocation.coordinate.longitude);
NSLog(@"NewLocation %f %f", newLocation.coordinate.latitude, newLocation.coordinate.longitude);

}

Answer 1

调查

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations;

并使用它来获取您当前的位置：

  [locations lastObject];

要获得距离，请使用：

  distanceFromLocation:

如何在 ios 中显示距离用户当前位置 20 公里附近的朋友的位置

How to show locations of friends on map near by 20 km from user current location in ios

ios

objective-c

dictionary

apple-maps