Swift(类之间的关系)

直接贴代码 不BB！
import UIKit

var str = "Hello, playground"
//关于集成的方法
class person{

//这是一个字段
var Name:String
//重写init方法，构造方法
init(name:String) {
    self.Name = name;

// print(name)
// print("personname = (self.Name)")

}

}

class woman:person{
//字段
var female:String
//构造方法
init(name:String,male:String) {
self.female = male

    print("name == \(name)")
    //调用父类方法，这个方法调用了之后我的子类的那么就被设置上了。（这里好奇怪为什么会被设置上呢？）
    super.init(name: name)
}

}

class Man:person{
var Weight:String
init(name:String,weigth:String) {
self.Weight = weigth
print("name == (name)")

    super.init(name: name)
}

}
let ArrayList = [woman(name:"gzz",male:"she"),
woman(name:"gle",male:"she"),
Man(name: "ty", weigth: "180"),
Man(name: "az", weigth: "101"),
Man(name: "az", weigth: "102")
]
print("--------------")

//这里为啥不能加加了我日
var womanCount = 0
var manCount = 0
for itme in ArrayList {
print(itme.Name)
if itme is woman {
womanCount+=1
}
if itme is Man {
manCount+=1
}
}

print("womanCount = (womanCount)")
print("manCount = (manCount)")

for items in ArrayList {
if let _ = items as? woman{
print("woman")
}
if let _ = items as? Man {
print("man")
}

}
//这里要加括号
let objcets:[AnyObject] = [
Man.init(name: "tl", weigth: "180"),
Man.init(name: "WX", weigth: "150"),
Man.init(name: "RZ", weigth: "160"),
]

for objc in objcets {
let man = objc as! Man
print("man:(man.Name)")
}

//var string01:String = obj as! String

//装任何类型
var thisngs = Any
thisngs.append(0)

thisngs.append(3.14159)

thisngs.append(0.111)

thisngs.append("hello")

thisngs.append("3.0,5.0")

thisngs.append(Man.init(name: "wukong", weigth: "130"))

thisngs.append(woman.init(name: "zixia", male: "120"))

//这个是完全看不明白，主要是不明白as的意思,
for this in thisngs {
switch this {
case 0 as Int:
print("Zero as an Int")
case let someDouble as Double where someDouble > 0:
print("a positive double value of(someDouble)")
case let someString as String:
print("a string value of (someString)")
case let (x, y) as (Double, Double):
print("an (x, y) point at (x), (y)")
case let man as Man:
print("Man: (man.Name)")
case let woma as woman:
print("woman: (woma.Name)")
default:
print("something else")

}

}
//还有一个问题是 他的字段 根本呼不出来！
woman.init(name: "wudi", male: "colss")

Man.init(name: "mais", weigth: "hepp")
//as 使用场合，派生类往上转
let man = Man.init(name: "wudi", weigth: "hehe")
let woma = woman.init(name: "女人", male: "160")

let wo = man as person

print(wo)
//（2）消除二义性，数值类型转换
let num1 = 42 as CGFloat

let num2 = 42 as Int

let num3 = 42.5 as Double
//（3）switch 语句中进行模式匹配
var Arraylist:Array = [Man.init(name: "Nanren", weigth: "wudi"),woman.init(name: "Nvren", male: "170")
]

let count = ArrayList.count

//这个外层要加个循环
for itme in ArrayList {
switch itme {
case let m as Man:
print("有man (m.Name)")

case let w as woman:
    print("有woman\(w.Name)")
    
default:
    print("something else")
    
}

}

//3，as?使用场合，向下转型（Downcasting）时使用。这个只能使用！
//父类 用子类的方法
let per:person = Man.init(name: "renlei", weigth: "180")
let pzm = per as! Man
print("基类转化派生类(pzm.Name)");

//as? 和 as! 操作符的转换规则完全一样。
let pers:person = woman.init(name: "人类转女人", male: "170")

if let Pzw = pers as? woman{

print("转化成功")

}else{

print("不成功等于null")

}

//Override简单理解就是这个句话下边的方法是继承父类的方法,对其覆盖