Swift - 重写相等协议Equatable

struct MeetingCheckInMemberModel:Equatable {
    var id                  = 0
    var meetingId           = 0
    var accountId           = 0
    var avatarVersion       = 0
    var name                = ""
    var nBought             = 0
    var timeAttend          = ""
    var bNeedCheckIn        = 0
    
    var isCheckIn:Bool{
        return { if self.timeAttend == "" || self.timeAttend == "0"{
                return false
            }else{
                return true
            }
        }()
    }
    
    
}
func ==(m1: MeetingCheckInMemberModel, m2: MeetingCheckInMemberModel) -> Bool{
    if m1.meetingId == m2.meetingId && m1.accountId == m2.accountId {
        return true
    }else{
        return false
    }
}
//判断2个对象或者结构体相等只需要实现Equatable协议就好，但是协议的实现在方法外面请注意