class Student{ var name: String = ""; var age: Int = 0; init(name: String ,age:Int) { self.name = name self.age = age } } let stu = Student(name: "xiao", age: 18) print("姓名： \(stu.name)")//姓名： xia
struct Person{
var name: String = "";
var age: Int = 0;
init(name: String ,age:Int) {
self.name = name
self.age = age
}
}
let person = Person(name: "xiao", age: 18)
print("姓名： \(person.name)")//姓名： xiao
结构体不需要考虑引用计数，接头体是值赋值，就是a赋值给b，如果改变b，则a不变，举例
let person = Person(name: "xiao", age: 18)
print("姓名： \(person.name)")//姓名： xiao
var per1 = person;
per1.name = "da"
print("姓名： \(person.name)")//姓名： xiao
原文：https://www.cnblogs.com/hualuoshuijia/p/11636187.html