类的创建

// 定义图书属性类

class BookClass{

var Bookcls = ""

var BookName = ""

var Price = 0.0

}

// 实例化5个BookClass类的对象

let objBookA = BookClass()

let objBookB = BookClass()

let objBookC = BookClass()

let objBookD = BookClass()

let objBookE = BookClass()

// 创建数组

var ArrayBook = [Any]()

// 初始化对象

objBookA.Bookcls = "励志"

objBookA.BookName = "钢铁人"

objBookA.Price = 45.0

objBookB.Bookcls = "文学"

objBookB.BookName = "小王子"

objBookB.Price = 35.7

objBookC.Bookcls = "小说"

objBookC.BookName = "平凡世界"

objBookC.Price = 40.0

objBookD.Bookcls = "少儿"

objBookD.BookName = "三毛儿"

objBookD.Price = 47.9

objBookE.Bookcls = "科技"

objBookE.BookName = "探索"

objBookE.Price = 77.0

// 将五个对象添加到数组中

ArrayBook = [objBookA,objBookB,objBookC,objBookD,objBookE]

// 打印数组里面所有对象的内容

print(ArrayBook)

// 打印价格最贵的图书的信息

print("最贵的图书信息为：分类:\(objBookE.Bookcls),书名:\(objBookE.BookName),价格:\(objBookE.Price)")

// 打印objBookC.Bookcls  == “小说”的图书的信息

print("小说的图书信息为：分类:\(objBookC.Bookcls),书名:\(objBookC.BookName),价格:\(objBookC.Price)")