Swift中HomeKist控件交互（HMCharacteristic）（六）

HMCharacteristic设置值，做控件交互

    func findCharacteristicsOfService(service:HMService){
        for characteristic in service.characteristics as [HMCharacteristic]{
            print("???????????????????? characteristic type:\(characteristic.characteristicType)")
            
            //HMCharacteristicTypeBrightness 灯光亮度
            if characteristic.characteristicType == HMCharacteristicTypeBrightness{
                if characteristic.isReadable() == false{
                    print("-------------不能读取")
                    return
                }
                characteristic.readValue { (error) in
                    if error == nil{
                        //
                        let value = characteristic.value as! Float;
                        print("---------------value：\(value)")
                        
                        if characteristic.isWritable(){
                            let newValue = value - 1;
                            characteristic.writeValue(newValue, completionHandler: { (error) in
                                if(error == nil){
                                    print("新值设置成功")
                                }else{
                                    print("新值设置失败")
                                }
                            })
                        }
                    }else{
                        print("-------------读取失败")
                    }
                }
            }
        }
    }