Swift Inheritance with custom array - ios

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)
}
I am trying to build a recipe app in Swift. Problem is creating the ingredients for it where I require a string,double,string.
How I imagined : an ingredient is an array of Ingredients. and to create a new recipe I just .append it to the recipeBrain
Main problem : when I try to append a new recipe to the recipeBrain array It says that the recipe1 is not declared.
( The AddRecipe class purpose is only testing with static data )
I changed it to recipeBrain.append(recipe1) But I still get the error : expected declaration , same with ingredients when I try to append

Answer 1

You are trying to append recipe and ingredient objects into their arrays in body of AddRecipe class, but you can't.
if you do this in body of a method everything will be ok, for example in init() method:
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)
}

Answer 2

You are getting the error message because you have tried to write code in a class declaration. You can only declare items such as properties, functions, enumerations and other classes directly inside a class declaration. Code, such as ingredients.append(ingredient) needs to go inside a function.
I would suggest that you move this code into a class function of your RecipeBrain class (or indeed put it somewhere else entirely, such as a view controller, but you haven't shown how your app is structured):
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 func addRecipe() -> [RecipeBrain] {
var recipeBrain = [RecipeBrain]()
var ingredients = [Ingredient]()
let ingredient = Ingredient(name: "apple", quantity: 1.0, unit: "Kg")
ingredients.append(ingredient)
let recipe1 = RecipeBrain(name: "Recipe1", pictureUrl: "nil", ingredients: ingredients, method: ["Method"])
recipeBrain.append(recipe1)
return recipeBrain
}
}
Now you can say let recipeBrain = RecipeBrain.addRecipe() and recipeBrain will be an array of RecipeBrain containing a single RecipeBrain