CoreBluetooth Playground

Question

Created Jun ’15

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Participants 1

I'm just reading up on the CoreBluetooth module and am trying a simple playground. This is on a late 2012 iMac which according to the system report definitely has BLE support / it is registered under my developer account.

Is there anything additional I need to do to get it running in a playground? At the moment the code is just assigning the delegate and checking the state. It triggers the print in the unsupported case.

class BLEScanner: NSObject, CBCentralManagerDelegate {
  
    var central: CBCentralManager?
  
    override init() {
        super.init()
        let centralQueue = dispatch_queue_create("hi", DISPATCH_QUEUE_SERIAL)
        central = CBCentralManager(delegate: self, queue: centralQueue)
    }

    func centralManagerDidUpdateState(central: CBCentralManager!) {
        switch (central.state) {
            case .PoweredOff: println("Powered off")
            case .Unauthorized: println("Unauthorized")
            case .Unknown: println("Unknown")
            case .PoweredOn: println("Powered on")
            case .Resetting: println("Resetting")
            case .Unsupported: println("Unsupported")
            default: break
        }
    }
}
let ble = BLEScanner()

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Answer 1

rols OP

Jun ’15

I'm surprised it even manages that since you don't keep the playground running at the end by running the runloop or using

import XCPlayground
...
XCPSetExecutionShouldContinueIndefinitely(true)

However even when I add those I get unsupported and that's my observation too, CoreBluetooth code returns unsupported in the playground environment, even the OSX playground environment. I wouldn't expect it to work in the iOS playground because CB doesn't work in the iOS sim, I would have expected it to work in the OSX one however .. but it appears not to.

I came here to see if anyone had the same experience, seems you do.

If you compile your code into a quick executable I suspect you'll find it works fine. Annoying however, I wanted to test some CB stuff as I was writing it.

Oddly enough this does work fine in the REPL, but that's not terribly helpful.

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