ios - 使用自定义数组的 Swift 继承

Question

class RecipeBrain: NSObject {
    var name: String
    var pictureUrl: String
    var likes = 0
    var ingredients: [Ingredient]
    var method: [String]

    init(name: String, pictureUrl: String, ingredients: [Ingredient], method: [String]) {
        self.name = name
        self.pictureUrl = pictureUrl
        self.ingredients = ingredients
        self.method = method
    }
}

class Ingredient{
    var name: String
    var quantity: Double
    var unit: String

    init(name: String, quantity: Double, unit: String) {
        self.name = name
        self.quantity = quantity
        self.unit = unit
    }
}

class AddRecipe {
    var recipeBrain = [RecipeBrain]()
    var ingredients = [Ingredient]()
    var ingredient = Ingredient(name: "apple", quantity: 1.0, unit: "Kg")
    ingredients.append(ingredient)
    var recipe1 = RecipeBrain(name: "Recipe1", pictureUrl: "nil", ingrexdients: ingredients, method: ["Method"])
    recipeBrain.append(recipe1)
}

我正在尝试在 Swift 中构建食谱应用程序。问题是在我需要字符串、 double 、字符串的地方为其创建成分。

我的想象:一种成分是一系列成分。并创建一个新的食谱，我只是将它附加到 recipeBrain

主要问题:当我尝试将新食谱附加到 recipeBrain 数组时，它说没有声明 recipe1。

(AddRecipe 类的目的只是测试静态数据)

我将其更改为 recipeBrain.append(recipe1) 但我仍然收到错误:预期的声明，当我尝试追加时与配料相同

Answer 1

您正在尝试将食谱和成分对象附加到 AddRecipe 类主体中的数组中，但您做不到。

如果你在方法体中这样做，一切都会好起来的，例如在 init() 方法中:

class AddRecipe {
var recipeBrain = [RecipeBrain]()
var ingredients = [Ingredient]()

init()
{
    var ingredient = Ingredient(name: "apple", quantity: 1.0, unit: "Kg")
    ingredients.append(ingredient)
    var recipe1 = RecipeBrain(name: "Recipe1", pictureUrl: "nil", ingredients: ingredients, method: ["Method"])
    recipeBrain.append(recipe1)
}