ios - 如何在不使用函数的情况下修改实例值？

Question

我有一个类:

class WeaponItems {

var name: String
var index: Int
var price: Int
var weaponPower: Int = 0
var attackSpeed: Double = 0
var criticalChance: Double = 0
var criticalDamage: Double = 0

init(name: String, index: Int, price: Int){
    self.name = name
    self.index = index
    self.price = price
}

var weaponBlade = WeaponItems(name: "Weapon Blade", index: 0, price: 300)
weaponBlade.weaponPower = 15
// Error: expected declaration

var swiftShooter = WeaponItems(name: "Swift Shooter", index: 1, price: 300)
swiftShooter.attackSpeed = 0.2
// Error: expected declaration

var minionsFoot = WeaponItems(name: "Minions Foot", index: 3, price: 300)
minionsFoot.criticalChance = 0.1
minionsFoot.criticalDamage = 0.1
// Error: expected declaration

}

我需要为每个项目设置 weaponPower attackSpeed ...，我这样做时遇到错误。

我找到的答案说你必须使用函数来修改实例的值，但我觉得这会使代码变得复杂，否则我该如何设置它的值？

使用函数的问题是它将创建实例和设置值的过程分开，使代码更难维护。

Answer 1

您应该为类中的所有 weaponItems 添加属性

那么你的类实现应该是这样的

class WeaponItems {

    var name: String
    var index: Int
    var price: Int
    var weaponPower: Int = 0
    var attackSpeed: Double = 0
    var criticalChance: Double = 0
    var criticalDamage: Double = 0

    var weaponBlade:WeaponItems{

        get {
            let tempWeaponBlade = WeaponItems(name: "Weapon Blade", index: 0, price: 300)
            tempWeaponBlade.weaponPower = 15
            return tempWeaponBlade
        }
    }

    var swiftShooter:WeaponItems{

        get {
            let tempSwiftShooter = WeaponItems(name: "Swift Shooter", index: 1, price: 300)
            tempSwiftShooter.attackSpeed = 0.2
            return tempSwiftShooter
        }
    }

    var minionsFoot:WeaponItems{

        get {
            let tempMinionsFoot = WeaponItems(name: "Minions Foot", index: 3, price: 300)
            tempMinionsFoot.criticalChance = 0.1
            tempMinionsFoot.criticalDamage = 0.1
            return tempMinionsFoot 
        }
    }


    init(name: String, index: Int, price: Int){
        self.name = name
        self.index = index
        self.price = price
    }

}