Firestore打印多个单个文档的实例

Question

尝试在子汇编（USERRECIPES）中打印所有文档

我只有两个文档中存在两个文档 - 问题是当我打印到控制台时，它多次多次打印两个文档。下面的印刷品示例：

[“ flounder”：{ createAt =“＆lt; firtimestamp：seconsts = 1656102838 nanseconds = 66710000＆gt;“;”; 方向=（（ 例子 ）； ingreDientItem = { 示例=示例; }; 配方=“”; copeepreptime =“”; 配方=比目鱼; }]] [[“鸡蛋”：{ createAt =“＆lt; firtimestamp：seconsts = 1656102790 nanseconds = 482897000＆gt;“; 方向=（（ ）； ingreDientItem = { “ 1杯” =面粉； }; 配方=“”; copepreptime =“ 20分钟”; 食谱=鸡蛋； }]] [[“鸡蛋”：{ createAt =“＆lt; firtimestamp：seconsts = 1656102790 nanseconds = 482897000＆gt;“; 方向=（（ ）； ingreDientItem = { “ 1杯” =面粉； }; 配方=“”; copepreptime =“ 20分钟”; 食谱=鸡蛋； }]， [“比目鱼”： { createAt =“＆lt; firtimestamp：seconsts = 1656102838 nanseconds = 66710000＆gt;“;”; 方向=（（ 例子 ）； ingreDientItem = { 示例=示例; }; 配方=“”; copeepreptime =“”; 配方=比目鱼; ]]]

下面是我的代码：

class RecipeLogic: ObservableObject {
    @Published var recipes = [RecipeItems]()
    @Published var recipeList = []
    init(){
     grabRecipes()
    }
    
    private func grabRecipes(){
        
        
        guard let uid = FirebaseManager.shared.auth.currentUser?.uid else {
            return
        }
        
        FirebaseManager.shared.firestore
            .collection("users")
            .document(uid)
            .collection("userRecipes")
            .getDocuments() { (snapshot, err) in
                if let err = err {
                    print("error")
                }
                else{
                    for recipe in snapshot!.documents {
                        self.recipeList.append(recipe.data())
                        print(self.recipeList)
                    }
                }
            }
        }
    }

struct RecipeItems: Codable, Hashable{
    var recipeTitle, recipePrepTime, recipeImage, createdAt: String
    var directions, ingredientItem: [String]
}

struct RecipeModel:Codable, Identifiable {
   var id: String = UUID().uuidString
    var recipes: [RecipeItems]
}

Answer 1

您您正在打印referalist在每次循环的每次迭代中，每次获得更新版本时，都只能打印一次firebase文档，您可以通过：

for recipe in snapshot!.documents {
      self.recipeList.append(recipe.data())
}
if let documents = snapshot.documents {
  // Your documents
  print(documents)
}