importFoundation

classmytest {

var_name:NSString?="test"

//构造函数

init(){

println(_name)

}

init(name:String){

_name= name

}

funcsayname(){

println("my name\(_name)")

}

//类方法

classfuncsaystaticname(){

("calss my name test")

}

}

classutest:mytest{

//重写方法

overridefuncsayname() {

("utest name)

}

}

//扩展类的功能可以很灵活的扩展后面的子类都会有此方法

extensionutest{

funcextensiontest(){

("extensiontest name)

}

}

/*

//调用静态访求

mytest.saystaticname()

var mytest3 = mytest(name: "swift");

mytest3.sayname()

//调用方法与有调用扩展方法

var utest1 = utest(name: "utest")

utest1.sayname()

utest1.extensiontest()

*/