OptionSet(静态属性集合)

struct YTMsgType:OptionSet {

    

    public var rawValue:UInt

    

    public static var text = YTMsgType(rawValue:1<<0)  

    

    public static var  img = YTMsgType(rawValue:1<<1) 

    

    public static var  praise = YTMsgType(rawValue:1<<2) 

    

    public static var  award = YTMsgType(rawValue:1<<3) 

    

    public static var  review = YTMsgType(rawValue:1<<4) 

    

    public static var  delete = YTMsgType(rawValue:1<<5)

}

//

set = [.text, .praise, .img, .review]

//判断

ifcellContain.rawValue &YTMsgType.delete.rawValue > 0 {

    print("---delete")

}

//......