ios - CLBeacon : How can I get the distance from the IBeacons?

Question

如何获取 iBeacon 的距离？我能够获取它们的proximity，但如何获取与 CLBeacon 的距离？我使用过 Estimote SDK，它给出了距离值，但我不知道如何使用 CLBeacon 获取它。

 - (void)locationManager:(CLLocationManager *)manager
        didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region{

    if (self.beaconRegion) {
        if([beacons count] > 0)
        {
            //get closes beacon and find its major
          CLBeacon *beacon = [beacons objectAtIndex:0];
       }
   }
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:nil];

    /*
     * Fill the table with beacon data.
     */
    ESTBeacon *beacon = [self.beaconsArray objectAtIndex:indexPath.row];
    beacon.delegate=self;
    cell.textLabel.text = [NSString stringWithFormat:@"Major: %@, Minor: %@", beacon.major, beacon.minor];
    cell.detailTextLabel.text = [NSString stringWithFormat:@"Distance: %.2f", [beacon.distance floatValue]];
    [beacon connectToBeacon];
    return cell;
}
-(void)beaconConnectionDidSucceeded:(ESTBeacon *)beacon{
    [beacon writeBeaconProximityUUID:@"B9407F30-F5F8-466E-AFF9-25556B57FE6D" withCompletion: ^(NSString *value, NSError *error){
        if(error){
            NSLog(@"Got error here: %@",[error description]);
        }else{
            NSLog(@"Congratulation! you've got sucessfully written UUID in beacon");
        }
    }];

}

Answer 1

精度属性应该给你一个距离:

CLBeacon *beacon = [beacons objectAtIndex:0];
beacon.accuracy

如果它不起作用，请确保调用 startRangingBeaconsInRegion:

[_locationManager startMonitoringForRegion:region];
[_locationManager startRangingBeaconsInRegion:region];