8、Swift 类、对象和方法全解析

Swift 类、对象和方法全解析

1. Swift 类基础

在 Swift 中，类是一种非常重要的编程结构。下面是一个 RadioStation 类的示例代码：

import UIKit

class RadioStation: Station {
    var name: String
    var frequency: Double

    override init() {
        name = "Default"
        frequency = 100
    }

    class func minAMFrequency() -> Double {
        return 520.0
    }

    class func maxAMFrequency() -> Double {
        return 1610.0
    }

    class func minFMFrequency() -> Double {
        return 88.3
    }

    class func maxFMFrequency() -> Double {
        return 107.9
    }

    func band() -> Int {
        if frequency >= RadioStation.minFMFrequency() && frequency <= RadioStation.maxFMFrequency() {
            return 1 /