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func alertViewGosterWithBluetoothSetting (titleText:String, messageText:String, actionTitleText:String) {
            
            let alertController = UIAlertController(title: titleText, message: messageText, preferredStyle: .Alert)
            
            let actionButton = UIAlertAction(title: actionTitleText, style: .Default) { (_) -> Void in
                
                let url = NSURL(string: "prefs:root=Bluetooth")
                UIApplication.sharedApplication().openURL(url!)
                
            }
    
        let okAction = UIAlertAction(title: "İptal", style: .Default) { (_) -> Void in
            
            self.navigationController?.popViewControllerAnimated(true)
            
        }
        
            alertController.addAction(actionButton)
            alertController.addAction(okAction)
            
            presentViewController(alertController, animated: true, completion: nil);

    }

func peripheralManagerDidUpdateState(peripheral: CBPeripheralManager) {
        
        var statusMessage = ""
        
        switch peripheral.state {
        case CBPeripheralManagerState.PoweredOn:
            statusMessage = "Bluetooth Status: Turned On"
            
        case CBPeripheralManagerState.PoweredOff:
            statusMessage = "Bluetooth Status: Turned Off"
            
            alertViewGosterWithBluetoothSetting("Bluetooth Kapalı", messageText: "Bluetooth kapalı olduğu için kontrol sağlayamıyoruz.", actionTitleText: "Ayarlar")
            break
            
        case CBPeripheralManagerState.Resetting:
            statusMessage = "Bluetooth Status: Resetting"
            
        case CBPeripheralManagerState.Unauthorized:
            statusMessage = "Bluetooth Status: Not Authorized"
            
        case CBPeripheralManagerState.Unsupported:
            statusMessage = "Bluetooth Status: Not Supported"
            
        default:
            statusMessage = "Bluetooth Status: Unknown"
        }
        
        print(statusMessage)
        
        if peripheral.state == CBPeripheralManagerState.PoweredOff {
            //TODO: Update this property in an App Manager class
        }
    }

var bluetoothPeripheralMan: CBPeripheralManager?
	let options = [CBCentralManagerOptionShowPowerAlertKey:0] //<-this is the magic bit!
        bluetoothPeripheralMan = CBPeripheralManager(delegate: self, queue: nil, options: options)
    
        peripheralManagerDidUpdateState(bluetoothPeripheralMan!)

class delegate yapılır. " CBPeripheralManagerDelegate "

import CoreBluetooth

Kütüphanelerden coreBluetooth eklenir.