宣告並例項化 CBCentralManager

Created: November-22, 2018

迅速：

var centralManager:CBCentralManager!

centralManager = CBCentralManager(delegate: self, queue: nil)

目標 C：

@property (nonatomic, strong) CBCentralManager *centralManager;

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