如何在字典数组中转换 FIRDataSnapshot？斯威夫特 3

Posted 2023-03-14

【中文标题】如何在字典数组中转换 FIRDataSnapshot？斯威夫特 3

【英文标题】：How to convert FIRDataSnapshot in array of dictionaries? Swift 3

【发布时间】：2017-06-13 15:30:18

【问题描述】：

我创建了“struct FireBaseData”，它使我能够从 Firebase 中检索数据。我想将数据转换为字典数组，然后将内容以 .txt 文件的形式输出到桌面。

如何将self.bookingInfo 转换为字典数组？

 func startObservingDB() 

 dbRef.child(FullData.uid!).observe(.value, with:  (snapshot: FIRDataSnapshot) in

        // an instance of FireBaseData holding all bookings under currentUid
        var newBookingInfo = [FireBaseData]()

 //iterate over all children under /FullData.uid! path
   for customer in snapshot.children 

      //the customer node starting with cus...
        let customerObject = customer as! FIRDataSnapshot

       //customer key
          self.customerKey = customerObject.key
             print("this is the Stripe customer that can be charged \(customerObject.key)")

 //now iterate over each booking which is located under customerObject in Firebase
     for booking in customerObject.children 



         // after each iteration through snapshot.children, create an instance of FireBaseData with  'booking' for the current iteration & assign it to bookingItem
            var bookingItem = FireBaseData(snapshot: booking as! FIRDataSnapshot)

        //assign key of the parent to each booking
                bookingItem.Key = self.customerKey

            // append the bookingItem after each iteration to newBookingInfo array
            newBookingInfo.append(bookingItem)

          // end of  for booking in myCustomer

     // end of  for customer in snapshot.children

        //assign newBookingInfo to global variable
         self.bookingInfo = newBookingInfo

 // sort the array in place so that the most recent date will appear first
 self.bookingInfo.sort(by: (DateAndTimeObject_1,DateAndTimeObject_2) -> Bool in

    DateAndTimeObject_1.TimeStampDateAndTime > DateAndTimeObject_2.TimeStampDateAndTime
 )


   let arrayOfDictionary = self.bookingInfo.flatMap  $0.toAnyObject() as? [String:Any] 
    let stringSeparated = arrayOfDictionary.joined(separator: "-")
print("stringSeparated \(stringSeparated)")


          self.tableView.reloadData()
    , withCancel:  (Error:Any) in
        print("Error firebase \(Error)")
    )

    // end of startObservingDB()





 //Model to retrive data

import Foundation
import UIKit
import Firebase
import FirebaseDatabase




struct FireBaseData 

// Create our Firebase Data model
// get arbitrary data

var FirebaseUserID:String!
var PaymentID:String!
var BookingAmount:String!
var BookingNumber:String!
var Key:String!
var PostCode:String!
var SelectedBathRow:Int!
var SelectedBedRow:Int!

var DateAndTime:String!
 var TimeStampDateAndTime:Int!
var TimeStampBookingSavedInDB:Int!

var BookingStatusClient:Bool!
var BookingStatusAdmin:Bool!
var BookingCompleted:Bool!


//used in RootController and RootController1 to determine if the booking has already been cancelled or not
var CostToCancelClient:String!
var CostToCancelAdmin:String!

var CostToRescheduleAdmin:String!
var CostToRescheduleClient:String!

var DoormanOption:String!
var EntryInstructions:String!
var NoteInstructions:String!


var FrequencyName:String!
var FrequecyAmount:Int!
var insideCabinets:Bool!
var insideFridge:Bool!
var insideOven:Bool!
var laundryWash:Bool!
var interiorWindows:Bool!

var SuppliesName:String!
var SuppliesAmount:Int!
var FullName:String!
var FlatNumber:String!
var StreetAddress:String!
var PhoneNumber:String!
var EmailAddress:String!

let Ref:FIRDatabaseReference?

init(BookingAmount:String,
     BookingNumber:String,
     PostCode:String,
     SelectedBathRow:Int,
SelectedBedRow:Int,
DateAndTime:String,
TimeStampDateAndTime:Int,

BookingStatusClient:Bool,
BookingStatusAdmin:Bool,
BookingCompleted:Bool,

FrequencyName:String,
FrequecyAmount:Int,
insideCabinets:Bool,
insideFridge:Bool,
insideOven:Bool,
laundryWash:Bool,
interiorWindows:Bool,
FullName:String,
SuppliesName:String,
SuppliesAmount:Int,
FlatNumber:String,
StreetAddress:String,
PhoneNumber:String,
EmailAddress:String,
Key:String = "") 

    self.BookingAmount = BookingAmount
    self.BookingNumber = BookingNumber
    self.Key = Key
    self.PostCode = PostCode
    self.SelectedBathRow = SelectedBathRow
    self.SelectedBedRow = SelectedBedRow
    self.DateAndTime = DateAndTime
    self.TimeStampDateAndTime = TimeStampDateAndTime

    self.BookingStatusClient = BookingStatusClient
    self.BookingStatusAdmin = BookingStatusAdmin
    self.BookingCompleted = BookingCompleted


    self.FrequencyName = FrequencyName
    self.FrequecyAmount = FrequecyAmount

    self.insideCabinets = insideCabinets
    self.insideFridge = insideFridge
    self.insideOven = insideOven
    self.laundryWash = laundryWash
    self.interiorWindows = interiorWindows

    self.FullName = FullName
    self.SuppliesName = SuppliesName
    self.SuppliesAmount = SuppliesAmount
    self.FlatNumber = FlatNumber

    self.StreetAddress = StreetAddress
    self.PhoneNumber = PhoneNumber
    self.EmailAddress = EmailAddress
    self.Ref = nil



// Content
// receive data from our firebase database

init(snapshot:FIRDataSnapshot)

    if let firebaseUserID = (snapshot.value! as? NSDictionary)?["FirebaseUserID"] as? String 
        FirebaseUserID = firebaseUserID
    

  if let paymentID = (snapshot.value! as? NSDictionary)?["PaymentID"] as? String 
        PaymentID = paymentID
    

    if let BookingAmountContent = (snapshot.value! as? NSDictionary)?["BookingAmount"] as? String 
        BookingAmount = BookingAmountContent
    

    if let BookingNumberContent = (snapshot.value! as? NSDictionary)?["BookingNumber"] as? String 
        BookingNumber = BookingNumberContent
    

    Key = snapshot.key
    Ref = snapshot.ref

    if let PostCodeContent = (snapshot.value! as? NSDictionary)?["PostCode"] as? String 
        PostCode = PostCodeContent
    

    if let SelectedBathRowContent = (snapshot.value! as? NSDictionary)?["SelectedBathRow"] as? String 
        SelectedBathRow = Int(SelectedBathRowContent)
    

    if let SelectedBedRowContent = (snapshot.value! as? NSDictionary)?["SelectedBedRow"] as? String 
        SelectedBedRow = Int(SelectedBedRowContent)
    

    if let DateAndTimeContent = (snapshot.value! as? NSDictionary)?["DateAndTime"] as? String 
        DateAndTime = DateAndTimeContent
    



    if let TimeStampDateAndTimeContent = (snapshot.value! as? NSDictionary)?["TimeStampDateAndTime"] as? String 
        TimeStampDateAndTime = Int(TimeStampDateAndTimeContent)
    

    if let TimeStampBookingSavedInDBContent = (snapshot.value! as? NSDictionary)?["TimeStampBookingSavedInDB"] as? String 
    TimeStampBookingSavedInDB = Int(TimeStampBookingSavedInDBContent)
    


    if let BookingStatusClientContent = (snapshot.value! as? NSDictionary)?["BookingStatusClient"] as? String
        BookingStatusClient = Bool(BookingStatusClientContent)
    



    if let BookingStatusAdminContent = (snapshot.value! as? NSDictionary)?["BookingStatusAdmin"] as? String 
        BookingStatusAdmin = Bool(BookingStatusAdminContent)
    

    if let BookingCompletedContent = (snapshot.value! as? NSDictionary)?["BookingCompleted"] as? String 
        BookingCompleted = Bool(BookingCompletedContent)
    



    if let costToCancelCient = (snapshot.value! as? NSDictionary)?["CostToCancelClient"] as? String 
        CostToCancelClient = costToCancelCient
    


    if let costToCancelAdmin = (snapshot.value! as? NSDictionary)?["CostToCancelAdmin"] as? String 
        CostToCancelAdmin  = costToCancelAdmin
    


    if let costToRescheduleAdmin = (snapshot.value! as? NSDictionary)?["CostToRescheduleAdmin"] as? String 
        CostToRescheduleAdmin = costToRescheduleAdmin
    

    if let costToRescheduleClient = (snapshot.value! as? NSDictionary)?["CostToRescheduleClient"] as? String 
        CostToRescheduleClient = costToRescheduleClient
    






    if let doormanOption = (snapshot.value! as? NSDictionary)?["DoormanOption"] as? String 
        DoormanOption = doormanOption
    

    if let entryInstructions = (snapshot.value! as? NSDictionary)?["EntryInstructions"] as? String 
        EntryInstructions = entryInstructions
    

    if let noteInstructions = (snapshot.value! as? NSDictionary)?["NoteInstructions"] as? String 
        NoteInstructions = noteInstructions
    



    if let FrequencyNameContent = (snapshot.value! as? NSDictionary)?["FrequencyName"] as? String 
        FrequencyName = FrequencyNameContent
    

    if let FrequecyAmountContent = (snapshot.value! as? NSDictionary)?["FrequecyAmount"] as? String 
        FrequecyAmount = Int(FrequecyAmountContent)
    

    if let insideCabinetsContent = (snapshot.value! as? NSDictionary)?["InsideCabinets"] as? String 
        insideCabinets = Bool(insideCabinetsContent)
    

    if let insideFridgeContent = (snapshot.value! as? NSDictionary)?["InsideFridge"] as? String 
        insideFridge = Bool(insideFridgeContent)
    

    if let insideOvenContent = (snapshot.value! as? NSDictionary)?["InsideOven"] as? String 
        insideOven = Bool(insideOvenContent)
    

    if let laundryWashContent = (snapshot.value! as? NSDictionary)?["LaundryWash"] as? String 
        laundryWash = Bool(laundryWashContent)
    

    if let interiorWindowsContent = (snapshot.value! as? NSDictionary)?["InteriorWindows"] as? String 
        interiorWindows = Bool(interiorWindowsContent)
    


    if let FullNameContent = (snapshot.value! as? NSDictionary)?["FullName"] as? String 
        FullName = FullNameContent
    

    if let SuppliesNameContent = (snapshot.value! as? NSDictionary)?["SuppliesName"] as? String 
        SuppliesName = SuppliesNameContent
    

    if let SuppliesAmountContent = (snapshot.value! as? NSDictionary)?["SuppliesAmount"] as? String 
        SuppliesAmount = Int(SuppliesAmountContent)
    

    if let FlatNumberContent = (snapshot.value! as? NSDictionary)?["FlatNumber"] as? String 
        FlatNumber = FlatNumberContent
    

    if let StreetAddressContent = (snapshot.value! as? NSDictionary)?["StreetAddress"] as? String 
        StreetAddress = StreetAddressContent
    

    if let PhoneNumberContent = (snapshot.value! as? NSDictionary)?["PhoneNumber"] as? String 
        PhoneNumber = PhoneNumberContent
    

    if let EmailAddressContent = (snapshot.value! as? NSDictionary)?["EmailAddress"] as? String 
        EmailAddress = EmailAddressContent
    




func toAnyObject() -> AnyObject 

    var someDict = [String : Any]()

    someDict["FirebaseUserID"] = self.FirebaseUserID as AnyObject?
    someDict["PaymentID"] = self.PaymentID as AnyObject?
    someDict["BookingAmount"] = self.BookingAmount as AnyObject?
    someDict["BookingNumber"] = self.BookingNumber as AnyObject?
    someDict["PostCode"] = self.PostCode as AnyObject?
    someDict["SelectedBathRow"] = self.SelectedBathRow as AnyObject?
    someDict["SelectedBedRow"] = self.SelectedBedRow as AnyObject?
    someDict["DateAndTime"] = self.DateAndTime as AnyObject?
    someDict["TimeStampDateAndTime"] = self.TimeStampDateAndTime as AnyObject?
    someDict["TimeStampBookingSavedInDB"] = self.TimeStampBookingSavedInDB as AnyObject?
    someDict["BookingStatusClient"] = self.BookingStatusClient as AnyObject?
    someDict["BookingStatusAdmin"] = self.BookingStatusAdmin as AnyObject?
    someDict["BookingCompleted"] = self.BookingCompleted as AnyObject?

    someDict["CostToCancelClient"] = self.CostToCancelClient as AnyObject?
    someDict["CostToCancelAdmin"] = self.CostToCancelAdmin as AnyObject?
    someDict["CostToRescheduleAdmin"] = self.CostToRescheduleAdmin as AnyObject?
    someDict["CostToRescheduleClient"] = self.CostToRescheduleClient as AnyObject?

    someDict["DoormanOption"] = self.DoormanOption as AnyObject?
    someDict["EntryInstructions"] = self.EntryInstructions as AnyObject?
    someDict["NoteInstructions"] = self.NoteInstructions as AnyObject?


    someDict["FrequencyName"] = self.FrequencyName as AnyObject?
    someDict["FrequecyAmount"] = self.FrequecyAmount as AnyObject?
    someDict["insideCabinets"] = self.insideCabinets ? "true" : "false"
    someDict["insideFridge"] = self.insideFridge ? "true" : "false"
    someDict["insideOven"] = self.insideOven ? "true" : "false"
    someDict["laundryWash"] = self.laundryWash ? "true" : "false"
    someDict["interiorWindows"] = self.interiorWindows ? "true" : false
    someDict["FullName"] = self.FullName as AnyObject?
    someDict["SuppliesName"] = self.SuppliesName as AnyObject?
    someDict["SuppliesAmount"] = self.SuppliesAmount as AnyObject?
    someDict["FlatNumber"] = self.FlatNumber as AnyObject?
    someDict["StreetAddress"] = self.StreetAddress as AnyObject?
    someDict["PhoneNumber"] = self.PhoneNumber as AnyObject?
    someDict["EmailAddress"] = self.EmailAddress as AnyObject?

    return someDict as AnyObject

 



Desired Output as per Nirav request

EmailAddress": [e-mail],
"PhoneNumber": 07476953923,

“付款 ID”：ch_1ARd6yLCZ34Ur7XG4wAqaH9H， “BookingAmount”：27

 EmailAddress": [e-mail],
 "PhoneNumber": 07476953923,
 "PaymentID": ch_1ARd6yLCZ34Ur7XG4wAqaH9H,
 "BookingAmount": 27


  EmailAddress": [e-mail],
  "PhoneNumber": 07476953923,
  "PaymentID": ch_1ARd6yLCZ34Ur7XG4wAqaH9H,
  "BookingAmount": 27

【参考方案1】：

您只需要像这样使用toAnyObject() 方法从您的FireBaseData 获取字典对象。

let arrayOfDictionary = self.bookingInfo.flatMap  $0.toAnyObject() as? [String:Any] 

您将在arrayOfDictionary 中获得您想要的结果，它是[[String:Any]] 的类型

【讨论】：

它正在工作，但是有一个问题，当我按照您上面的建议调用toAnyObject() 函数时，arrayOfDictionary 中的布尔值显示为 Int，其中 1 表示真，0 表示假，而不是真假。鉴于我的初始模型，我将如何获得 Bool 值的字符串值的结果。

我试图将 arrayOfDictionary 内容输出到 .txt 文件到桌面，这就是为什么我需要为这些值使用 String 而不是 Bool

@bibscy 好的，那么您可以做的就是再制作一种这样的方法，因为您无法更改此方法，因为您将这个方法与 Firebase 一起使用，然后当您使用键设置布尔值时设置它像这样。 someDict["insideOven"] = self.insideOven ? "true" : "false"

我想对数组内的字典进行排序，它们之间有一个中断，以便我可以在 .txt 文件中的桌面上很好地输出它们，但我收到错误：参数传递给不带参数的调用. ` let stringSeparated = arrayOfDictionary.joined(separator: "-")`

让我们continue this discussion in chat。