Swift实现OC中的单例模式

import Foundation

class MySingle{
//定义单例的属性
var name:String?
var age:Int?

var height:Double?
//定义类方法
class func shareInstance()->MySingle{
struct qzSingle{
static var predicate:dispatch_once_t = 0
static var instance:MySingle? = nil
}
dispatch_once(&qzSingle.predicate,{
qzSingle.instance = MySingle()
})
return qzSingle.instance!
}
}

//单例的使用
var single = MySingle.shareInstance()
single.name = "秦志伟"
single.age = 24
single.height = 176.00

println(single)