使用 CKQuery

如何解决使用 CKQuery

我有一份食谱的 CKRecord，可以获取到 iOS 应用程序。获得该列表后，我需要优先考虑建议最高的“likedIds”的食谱结果，该结果是表示 recipe_ids 的整数列表（请参见下面的数据集图像），然后在其下方显示剩余的食谱。我不能仅仅按评分最高的食谱排序，因为我在项目的其他地方使用协同过滤来建议特定食谱而不是其他食谱，但我仍然想将它们全部列出。

在下面的代码中，我将 NSPredicates 的结果附加到名为“查询”的 CKQuery 列表中。既然我有了那个 [CKquery]，我该怎么办？如何获取我需要的结果？如果 publicDB.perform() 不是正确的方法（因为我收到“预期参数类型”错误），我应该使用哪种方法？下面，我尝试在我编写的 AttachToMainThread() 函数内使用 for 循环，但在刷新时我得到 3 个不同的随机结果，“likedIds”列表中的食谱，“likedIds”列表中的食谱，或者什么都没有所有，但没有 SIGABRT 错误，这很好。

TL;DR

如何处理我的 CKquery 列表以获取结果？

感谢您的宝贵时间！

只是专注于主要主题的代码：

import Foundation
import CloudKit

class Model {
  // MARK: - iCloud Info
  let container: CKContainer
  let publicDB: CKDatabase

  private(set) var recipes: [Recipe] = []
  static var currentModel = Model()
  
  init() {
    container = CKContainer.default()
    publicDB = container.publicCloudDatabase
    privateDB = container.privateCloudDatabase
  }
  
  @objc func refresh(_ completion: @escaping (Error?) -> Void) {
    var queries = [CKQuery] () 
    // Function that returns a CKQuery
    let likedQuery = GetRecipesWithLikedIds()
    queries.append(likedQuery)
    
    // Function that returns a CKQuery
    let unlikedQuery = GetRecipesWithoutLikedIds()
    queries.append(unlikedQuery)

    AttachToMainThread(forQuery: queries,completion)
  }

  private func AttachToMainThread(forQuery queries: [CKQuery],_ completion: @escaping (Error?) -> Void) {
    for q in queries {
      publicDB.perform(q,inZoneWith: CKRecordZone.default().zoneID) { [weak self] results,error in
        guard let self = self else { return }
        if let error = error {
          DispatchQueue.main.async {
            completion(error)
          }
          return
        }
        guard let results = results else { return }
        self.recipes = results.compactMap {
          Recipe(record: $0,database: self.publicDB)
          
        }
        DispatchQueue.main.async {
          completion(nil)
        }
      }
    }
  }
}

我的整个代码：

    import Foundation
    import CloudKit
    
    class Model {
      // MARK: - iCloud Info
      let container: CKContainer
      let publicDB: CKDatabase
      
      var carbohydrate = "rice"
      var vegetable = "tomatoes"
      
      // MARK: - Properties
      private(set) var recipes: [Recipe] = []
    
      static var currentModel = Model()
      
      init() {
        container = CKContainer.default()
        publicDB = container.publicCloudDatabase
        privateDB = container.privateCloudDatabase
      }
      
      @objc func refresh(_ completion: @escaping (Error?) -> Void) {
        var queries = [CKQuery] ()
        
        let likedQuery = GetRecipesWithLikedIds()
        queries.append(likedQuery)
        let unlikedQuery = GetRecipesWithoutLikedIds()
        queries.append(unlikedQuery)
    
        AttachToMainThread(forQuery: queries,completion)
      }
    
      private func AttachToMainThread(forQuery queries: [CKQuery],_ completion: @escaping (Error?) -> Void) {
        for q in queries {
          publicDB.perform(q,error in
            guard let self = self else { return }
            if let error = error {
              DispatchQueue.main.async {
                completion(error)
              }
              return
            }
            guard let results = results else { return }
            self.recipes = results.compactMap {
              Recipe(record: $0,database: self.publicDB)
              
            }
            for r in self.recipes {
              self.PrettyPrintRecipes(rName: r.name,rId: String(r.recipe_id),rIng: r.ingredients)
            }
            DispatchQueue.main.async {
              completion(nil)
            }
          }
        }
      }
      
      func GetRecipesWithLikedIds() -> CKQuery {
        let searchTextA: [String] = [carbohydrate," "+carbohydrate,carbohydrate+"s",carbohydrate+"es"]
        let subPred1 = NSPredicate (format: "ANY ingredients IN %@",argumentArray: [searchTextA])
        let searchTextB: [String] = [vegetable," "+vegetable,vegetable+"s",vegetable+"es"]
        let subPred2 = NSPredicate (format: "ANY ingredients IN %@",argumentArray: [searchTextB])
        let likedIds: [Int] = [13733,32441]
        let subPred3 = NSPredicate (format: "NOT (recipe_id IN %@)",likedIds)
        let and_pred1 = NSCompoundPredicate(andPredicateWithSubpredicates: [subPred1,subPred2])
        let and_pred2 = NSCompoundPredicate(andPredicateWithSubpredicates: [subPred3])
        let predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [and_pred1,and_pred2])
        return CKQuery(recordType: "Recipe",predicate: predicate)
      }
      
      func GetRecipesWithoutLikedIds() -> CKQuery {
        let searchTextA: [String] = [carbohydrate,32441]
        let subPred3 = NSPredicate (format: "recipe_id IN %@",argumentArray: [likedIds])
        let and_pred1 = NSCompoundPredicate(andPredicateWithSubpredicates: [subPred1,predicate: predicate)
      }
    
      func PrettyPrintRecipes(rName: String,rId: String,rIng: [String]) {
        print("Name: "+rName)
        print("Recipe_id: "+rId)
        print("Ingredients:")
        for s in 0..<rIng.count {
          print("\t"+String(s)+": "+rIng[s])
        }
      }
      
      public func printVegetable(){
        print(vegetable)
      }
    }

我的数据集的示例图像