swift3解析模型问题答案

【问题标题】：swift3 parsing with model issueswift3解析模型问题
【发布时间】：2016-12-26 00:48:04
【问题描述】：

您好，我正在尝试解析这个 json 文件：http://pastebin.com/TCdkJnvZ

这是我用我要解析的信息制作的类：

public class Recipe: NSObject {

  var recipeID : NSNumber?
  var categoryName : String?
  var ingredients : [Int : Ingredients]?
  var nutrition : [Nutrition]?
  var imageName : String?
  var instructions : [Int : String]?

}

class Ingredients : NSObject {

   var id : NSNumber?
   var name : String?
   var quantity: NSNumber?
   var unit : String?

}

class  Nutrition : NSObject {

  var serving : String?
  var calories : NSNumber?
  var fat : String?
  var carbs : NSNumber?

 }

这张图片是当前的问题..我真的不确定我在这里做错了什么..所以如果我能在修复我的逻辑/问题上获得任何帮助，我们将不胜感激。

 func parseToJSON(data: Any) {

    // add meals to here
    var recipes : [Recipe]
    // single meals here
    var meals : Recipe

    do {

        if let json = try JSONSerialization.jsonObject(with: data as! Data) as? [String: Any],
        meals.recipeID == json["recipeID"] as! NSNumber? ,
        meals.imageName == json["ImageURL"] as! String?,
        //meals.instructions == meals.parseInstructions(instructions: (json["Instructions"] as! String)),
        meals.categoryName == "Meals" ,

        let ingredients = json["Ingredients"] as! [[String: Any]]? {

                for items in ingredients {
                    var i : Int = 0
                    var groceryItems : Ingredients

                    groceryItems.id = items["IngredientID"] as? NSNumber
                    groceryItems.name = items["Name"] as? String
                    groceryItems.quantity = items["Quantity"] as? NSNumber
                    groceryItems.unit = items["Unit"] as? String

                    meals.ingredients?[i] = groceryItems
                }
            };

        let nutritionInfo = json["NutritionInfo"] as! [[String: Any]]? {

                for items in nutritionInfo {

                    var nutrition : Nutrition

                    nutrition.serving = items["SingularYieldUnit"] as? String
                    nutrition.calories = items["TotalCalories"] as? NSNumber
                    nutrition.fat = items["TotalFat"] as? String
                    nutrition.carbs = items["TotalCarbs"] as NSNumber

                    meals.nutrition = nutrition
                }
        };
    }
    catch{

    }

}

【问题讨论】：

请发布实际代码，不是代码的图像。
好的，我添加了代码

标签： ios json swift3

【解决方案1】：

您似乎有多种语法错误，但编译器一次只能显示一个问题。我已经为您稍微清理了代码，这应该会将您推向正确的方向。我无法完全解决它，因为我不知道你的确切意图是什么。

这里是更新后的parseToJSON函数：

func parseToJSON(data: Any) {

    let meals = Recipe()

    do {

        if let json = try JSONSerialization.jsonObject(with: data as! Data) as? [String: Any] {

            meals.recipeID == json["recipeID"] as! NSNumber?
            meals.imageName == json["ImageURL"] as! String?
            //meals.instructions == meals.parseInstructions(instructions: (json["Instructions"] as! String)),
            meals.categoryName == "Meals"

            if let ingredients = json["Ingredients"] as! [[String: Any]]? {
                for items in ingredients {
                    let groceryItems = Ingredients()
                    groceryItems.id = items["IngredientID"] as? NSNumber
                    groceryItems.name = items["Name"] as? String
                    groceryItems.quantity = items["Quantity"] as? NSNumber
                    groceryItems.unit = items["Unit"] as? String
                    meals.ingredients?.append(groceryItems)
                }
            }

            if let nutritionInfo = json["NutritionInfo"] as! [[String: Any]]? {
                for items in nutritionInfo {
                    let nutrition = Nutrition()
                    nutrition.serving = items["SingularYieldUnit"] as? String
                    nutrition.calories = items["TotalCalories"] as? NSNumber
                    nutrition.fat = items["TotalFat"] as? String
                    nutrition.carbs = items["TotalCarbs"] as? NSNumber
                    meals.nutrition?.append(nutrition)
                }
            }

        }

    }
    catch{

    }

}

我还将Recipe 对象的ingredients 属性更改为：

var ingredients : [Ingredients]?

主要问题是您的很多代码都在 if let 表达式中，并且您的缩进已关闭，因此您无法轻易分辨。

【讨论】：