Find Closest Beacon in every second by using RSSI in Objective-C

Question

In Stack Overflow, I've seen answer to find closest beacon (Swift find closest Beacon by rssi).

Here I tried with accuracy to find closest in Objective-C. My app finds beacon in every sec that time accuracy is not working finding closest properly. As he said RSSI will update in every 1 sec. So I'd like to filter closest beacon using RSSI. I converted your Swift code into Objective-C but it's not working fine.

Here is Swift code:

//Swift code
var closestBeacon: CLBeacon? = nil
for beacon in beacons {
    if beacon.rssi < 0 && closestBeacon != nil && beacon.rssi > closestBeacon!.rssi {
        closestBeacon = beacon as? CLBeacon
    }
}

Here is Objective-C code I converted not working:

CLBeacon *closest = nil;

for (CLBeacon *beacon in beacons) {

    if (beacon.rssi < 0 &&  closest != nil && beacon.rssi > closest.rssi) {

        closest = beacon;

    }
}

Here please make me perfect where I'm doing wrong.

Answer 1

There is a bug in both versions of code as @paulw11 suggests. Since I wrote that bug in response to another question here is a fix:

Swift

var closestBeacon: CLBeacon? = nil
for beacon in beacons {
    if closestBeacon == nil || beacon.rssi < 0 && beacon.rssi > closestBeacon!.rssi {
        closestBeacon = beacon as? CLBeacon
    }
}

Objective-C

CLBeacon *closestBeacon = nil;

for (CLBeacon *beacon in beacons) {

    if (closestBeacon == nil || beacon.rssi < 0 && beacon.rssi > closest.rssi) {

        closestBeacon = beacon;

    }
}

I fixed the bug in the original post, too.