Swift 中“self”的用途是什么

在Swift中，关键字"self"用来引用当前实例。它允许我们在一个类的方法中访问该类的属性和方法，以及避免命名冲突。本文将会详细介绍"self"的用途，并提供一些实际案例来帮助读者更好地理解。

swift
class Person {
    var name: String
    
    init(name: String) {
        self.name = name
    }
    
    func sayHello() {
        print("Hello, my name is \(self.name).")
    }
}
let person = Person(name: "John")
person.sayHello() // 输出: "Hello, my name is John."

swift
class Person {
    var name: String
    
    init(name: String) {
        self.name = name
    }
    
    func changeName(name: String) {
        self.name = name
    }
}
let person = Person(name: "John")
person.changeName(name: "Tom")
print(person.name) // 输出: "Tom"

swift
class Person {
    var name: String
    
    init(name: String) {
        self.name = name
    }
    
    func doSomething() {
        DispatchQueue.main.async { [weak self] in
            self?.name = "New Name"
        }
    }
}