override "init" in objective-c

- (id)init {

    self = [super init];

    if (self) {

        [self resetCentralManager];

    }

    return self;

}

-(void)resetCentralManager{

    // Will callack on centralManagerDidUpdateState delegate

    _centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];

    _data = [[NSMutableData alloc] init];

}