Firebase iOS Swift致命错误：NSArray元素无法与Swift数组元素类型匹配

本文介绍了Firebase iOS Swift致命错误：NSArray元素无法与Swift数组元素类型匹配的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ {chits ：{Chit-1：{Bidders：[ {bankAccNumber：5555566966，bankIFSC：GFHJJHHJ ，bankName：55666，bidderEmail：[email protected]，bidderId：Bidder-1， bidderName：Venkat Desi，bidderPhone：9999999999，checked：false，paymentType：66555 }， {bankAccNumber：5555566966，bankIFSC：GFHJJHHJ，bankName：55666，bidderEmail：desi @ venkat。投标人2，bidderName：Venkat Desi，bidderPhone：9999999999， ：false，paymentType：66555 } ]，chit Id：Chit-1，chitName：ABC1，chitTotalValue：240000，endDate：11/10/2018，monthlyShare：1000，startDate：11/10/2017，totalMonths：12 } } } 根据上面的JSON，我创建了模型 class Bidder { var bidderId：Int var bidderName：String var bidderEmail：String var bidderPhone：String var modeOfPayment：Int var bidderBankName：String var bidderBankAcno：String var bidderIfscCode：String var paymentArray：[[String：String]]？ var chitrefArray：[String]？ var ref：FIRDatabaseReference？ （BidderId：Int，bidderName：String，bidderEmail：String，bidderPhone：String，modeOfPayment：Int，bidderBankName：String，bidderBankAcno：String，bidderIfscCode：String，paymentArray：[[String：String] ]，chitrefArray：[String]）{ self.bidderId = bidderId self.bidderName = bidderName self.bidderEmail = bidderEmail self.bidderPhone = bidderPhone self .modeOfPayment = modeOfPayment self.bidderBankName = bidderBankName self.bidderBankAcno = bidderBankAcno self.bidderIfscCode = bidderIfscCode self.paymentArray = paymentArray self.chitrefArray = chitrefArray self.ref = nil } init（snapshot：FIRDataSnapshot）{ let snapshotValue = snapshot.value as！ [String：AnyObject] bidderId = snapshotValue [bidderId] as！ Int bidderName = snapshotValue [bidderName] as！字符串 bidderEmail = snapshotValue [bidderEmail]为！字符串 bidderPhone = snapshotValue [bidderPhone] as！字符串 modeOfPayment = snapshotValue [modeOfPayment] as！ Int bidderBankName = snapshotValue [bidderBankName] as！字符串 bidderBankAcno = snapshotValue [bidderBankAcno] as！字符串 bidderIfscCode = snapshotValue [bidderIfscCode] as！字符串 paymentArray = snapshotValue [paymentArray] as？ [[String：String]] chitrefArray = snapshotValue [chitrefArray] as？ [String] ref = snapshot.ref } func toAnyObject（） - >任何{ return [bidderId：bidderId，bidderName：bidderName，bidderEmail：bidderEmail，bidderPhone：bidderPhone，modeOfPayment：modeOfPayment，bidderBankName：bidderBankName，bidderBankAcno：bidderBankAcno，bidderIfscCode：bidderIfscCode，paymentArray：paymentArray as Any， chitrefArray：chitrefArray as Any ] } } var chitId：Int var chitName：String var startDate：String var endDate：String var chitTotalAmt：Int var chitTotalMonths：Int var bidders：[Bidder] var ref：FIRDatabaseReference？ $ b $ init（chitId：Int，chitName：String，startDate：String，endDate：String，chitTotalAmt：Int，chitTotalMonths：Int，bidders：[Bidder]）{ self.chitId = chitId self.chitName = chitName self.startDate = startDate self.endDate = endDate self.chitTotalAmt = chitTotalAmt self.chitTotalMonths = chitTotalMonths self .bidders = bidders self.ref = nil } init（snapshot：FIRDataSnapshot）{ let snapshotValue = snapshot.value as！ [String：AnyObject] chitId = snapshotValue [chitId] as！ Int chitName = snapshotValue [chitName] as！字符串 startDate = snapshotValue [startDate] as！字符串 endDate = snapshotValue [endDate] as！字符串 chitTotalAmt = snapshotValue [chitTotalAmt] as！ Int chitTotalMonths = snapshotValue [chitTotalMonths] as！ Int bidders = snapshotValue [bidders] as！ [Bidder] ref = snapshot.ref } func toAnyObject（） - >词典< String，Any> 返回[chitId：chitId，chitName：chitName，startDate：startDate，$ b $endDate：endDate ，chitTotalAmt：chitTotalAmt，chitTotalMonths：chitTotalMonths，bidders：bidders.map（{$ 0.toAnyObject（）}）] } $ b 然而，在Viewcontroller中我试图获取 $ b var chitsArray = [ChitObject]（） ChitUtils。观察（.value，其中：$快照$ b $如果snapshot.childrenCount> 0 { self.chitsArray.removeAll（）为snapshot.children中的项目 { let chitItem = ChitObject（snapshot：item as！FIRDataSnapshot） self.chitsArray.append（chi （self.chitsArray.first！.bidders） ChitUtils.lastChitId =（self.chitsArray。（）） self.chitsArray = self.chitsArray.reversed（） print第一？.chitId）！ + 1 self.chitsTableView.reloadData（）} }） 解决方案 问题出在您的 ChitObject bidders = snapshotValue [bidders] as！ [Bidder] 您需要创建一个Bidders数组并将其分配给Bidders变量。循环访问您从snapshotValue [bidders]获得的数组，并为每个值创建Bidders对象，并将其分配到Swift数组中。 我还没有使用Firebase，这样的东西可能会工作： $ $ p $ code init init（snapshot：FIRDataSnapshot）{ let snapshotValue = snapshot.value as！ [String：AnyObject] chitId = snapshotValue [chitId] as！ Int chitName = snapshotValue [chitName] as！字符串 startDate = snapshotValue [startDate] as！字符串 endDate = snapshotValue [endDate] as！字符串 chitTotalAmt = snapshotValue [chitTotalAmt] as！ Int chitTotalMonths = snapshotValue [chitTotalMonths] as！如果让biddersArray = snapshotValue [bidders]为int ？ [[String：Any]] { bidders = biddersArray.flatMap {Bidder（dict：$ 0）} } ref = snapshot.ref } code $ 编辑： 类Bidder { var bidderId：Int var bidderName：String var bidderEmail：String var bidderPhone：String var modeOfPayment：Int var bidderBankName：String var bidderBankAcno：String var bidderIfscCode：String var paymentArray：[[String：String]]？ var chitrefArray：[String]？ var ref：FIRDatabaseReference？ 便捷初始化（字符串：[String：Any]）{ guard让bidderId = dict [bidderId]为？诠释，让bidderName = dict [bidderName]为？字符串，让bidderEmail = dict [bidderEmail]为？字符串，让bidderPhone = dict [bidderPhone]为？字符串，请让modeOfPayment = dict [paymentType]为？诠释，让bidderBankName = dict [bankName]为？字符串，让bidderBankAcno = dict [bankAccNumber]为？字符串，让bidderIfscCode = dict [bankIFSC]为？ （bidderId：bidderId，bidderName：bidderName，bidderEmail：bidderEmail，bidderPhone：bidderPhone，modeOfPayment：modeOfPayment，bidderBankName：bidderBankName，bidderBankAcno：bidderBankAcno， bidderIfscCode：bidderIfscCode，paymentArray：[[]]，chitrefArray：[]）} （bidderId：Int，bidderName：String，bidderEmail：String，bidderPhone：String，modeOfPayment：Int ，bidderBankName：String，bidderBankAcno：String，bidderIfscCode：String，paymentArray：[[String：String]]，chitrefArray：[String]）{ self.bidderId = bidderId self.bidderName = bidderName self.bidderEmail = bidderEmail self.bidderPhone = bidderPhone self.modeOfPayment = modeOfPayment self.bidderBankName = bidderBankName self.bidderBankAcno = bidderBankAcno self.bidderIfscCode = bidderIfscCode self.paymentArray =支付mentArray self.chitrefArray = chitrefArray self.ref = nil } init（snapshot：FIRDataSnapshot）{ let snapshotValue = snapshot.value as ！ [String：AnyObject] bidderId = snapshotValue [bidderId] as！ Int bidderName = snapshotValue [bidderName] as！字符串 bidderEmail = snapshotValue [bidderEmail]为！字符串 bidderPhone = snapshotValue [bidderPhone] as！字符串 modeOfPayment = snapshotValue [modeOfPayment] as！ Int bidderBankName = snapshotValue [bidderBankName] as！字符串 bidderBankAcno = snapshotValue [bidderBankAcno] as！字符串 bidderIfscCode = snapshotValue [bidderIfscCode] as！字符串 paymentArray = snapshotValue [paymentArray] as？ [[String：String]] chitrefArray = snapshotValue [chitrefArray] as？ [String] ref = snapshot.ref } func toAnyObject（） - >任何{ return [bidderId：bidderId，bidderName：bidderName，bidderEmail：bidderEmail，bidderPhone：bidderPhone，modeOfPayment：modeOfPayment，bidderBankName：bidderBankName，bidderBankAcno：bidderBankAcno，bidderIfscCode：bidderIfscCode，paymentArray：paymentArray as Any， chitrefArray：chitrefArray as Any ] } } I am trying to fetch data from firebase database the format of data is below.{ "chits": { "Chit-1": { "Bidders": [ { "bankAccNumber": "5555566966", "bankIFSC": "GFHJJHHJ", "bankName": "55666", "bidderEmail": "[email protected]", "bidderId": "Bidder-1", "bidderName": "Venkat Desi", "bidderPhone": "9999999999", "checked": false, "paymentType": 66555 }, { "bankAccNumber": "5555566966", "bankIFSC": "GFHJJHHJ", "bankName": "55666", "bidderEmail": "[email protected]", "bidderId": "Bidder-2", "bidderName": "Venkat Desi", "bidderPhone": "9999999999", "checked": false, "paymentType": 66555 } ], "chitId": "Chit-1", "chitName": "ABC1", "chitTotalValue": 240000, "endDate": "11/10/2018", "monthlyShare": 1000, "startDate": "11/10/2017", "totalMonths": 12 } }}According to the above JSON, I have created models class Bidder { var bidderId: Int var bidderName: String var bidderEmail: String var bidderPhone : String var modeOfPayment: Int var bidderBankName: String var bidderBankAcno: String var bidderIfscCode: String var paymentArray : [[String:String]]? var chitrefArray : [String]? var ref: FIRDatabaseReference? init(bidderId: Int, bidderName: String,bidderEmail: String, bidderPhone: String, modeOfPayment: Int, bidderBankName: String, bidderBankAcno: String, bidderIfscCode: String,paymentArray: [[String:String]], chitrefArray: [String]) { self.bidderId = bidderId self.bidderName = bidderName self.bidderEmail = bidderEmail self.bidderPhone = bidderPhone self.modeOfPayment = modeOfPayment self.bidderBankName = bidderBankName self.bidderBankAcno = bidderBankAcno self.bidderIfscCode = bidderIfscCode self.paymentArray = paymentArray self.chitrefArray = chitrefArray self.ref = nil } init(snapshot: FIRDataSnapshot) { let snapshotValue = snapshot.value as! [String: AnyObject] bidderId = snapshotValue["bidderId"] as! Int bidderName = snapshotValue["bidderName"] as! String bidderEmail = snapshotValue["bidderEmail"] as! String bidderPhone = snapshotValue["bidderPhone"] as! String modeOfPayment = snapshotValue["modeOfPayment"] as! Int bidderBankName = snapshotValue["bidderBankName"] as! String bidderBankAcno = snapshotValue["bidderBankAcno"] as! String bidderIfscCode = snapshotValue["bidderIfscCode"] as! String paymentArray = snapshotValue["paymentArray"] as? [[String : String]] chitrefArray = snapshotValue["chitrefArray"] as? [String] ref = snapshot.ref } func toAnyObject() -> Any { return [ "bidderId" : bidderId, "bidderName" : bidderName, "bidderEmail": bidderEmail, "bidderPhone": bidderPhone, "modeOfPayment": modeOfPayment, "bidderBankName":bidderBankName, "bidderBankAcno": bidderBankAcno, "bidderIfscCode":bidderIfscCode, "paymentArray": paymentArray as Any, "chitrefArray" : chitrefArray as Any ] }}class ChitObject { var chitId : Int var chitName: String var startDate: String var endDate : String var chitTotalAmt: Int var chitTotalMonths: Int var bidders: [Bidder] var ref: FIRDatabaseReference? init(chitId: Int,chitName: String, startDate: String, endDate: String, chitTotalAmt: Int, chitTotalMonths: Int, bidders: [Bidder]) { self.chitId = chitId self.chitName = chitName self.startDate = startDate self.endDate = endDate self.chitTotalAmt = chitTotalAmt self.chitTotalMonths = chitTotalMonths self.bidders = bidders self.ref = nil } init(snapshot: FIRDataSnapshot) { let snapshotValue = snapshot.value as! [String: AnyObject] chitId = snapshotValue["chitId"] as! Int chitName = snapshotValue["chitName"] as! String startDate = snapshotValue["startDate"] as! String endDate = snapshotValue["endDate"] as! String chitTotalAmt = snapshotValue["chitTotalAmt"] as! Int chitTotalMonths = snapshotValue["chitTotalMonths"] as! Int bidders = snapshotValue["bidders"] as! [Bidder] ref = snapshot.ref } func toAnyObject() -> Dictionary<String, Any> { return [ "chitId" : chitId, "chitName": chitName, "startDate": startDate, "endDate": endDate, "chitTotalAmt":chitTotalAmt, "chitTotalMonths": chitTotalMonths, "bidders":bidders.map({$0.toAnyObject()}) ] }}However, In Viewcontroller I am trying to fetch the biddersList from the code below.var chitsArray = [ChitObject]() ChitUtils.chitRef.queryOrdered(byChild: "chitId").observe(.value, with: { snapshot in if snapshot.childrenCount > 0 { self.chitsArray.removeAll() for item in snapshot.children { let chitItem = ChitObject(snapshot: item as! FIRDataSnapshot) self.chitsArray.append(chitItem) } self.chitsArray = self.chitsArray.reversed() print(self.chitsArray.first!.bidders) ChitUtils.lastChitId = (self.chitsArray.first?.chitId)! + 1 self.chitsTableView.reloadData() } }) 解决方案 The issue is in your ChitObject class, specifially here:bidders = snapshotValue["bidders"] as! [Bidder]You would need to create an array of Bidders and assign that into bidders variable. Loop through the array you get from snapshotValue["bidders"] and create Bidders object for every value and assign that into a Swift array.I have not workded with Firebase but something like this may work:init(snapshot: FIRDataSnapshot) { let snapshotValue = snapshot.value as! [String: AnyObject] chitId = snapshotValue["chitId"] as! Int chitName = snapshotValue["chitName"] as! String startDate = snapshotValue["startDate"] as! String endDate = snapshotValue["endDate"] as! String chitTotalAmt = snapshotValue["chitTotalAmt"] as! Int chitTotalMonths = snapshotValue["chitTotalMonths"] as! Int if let biddersArray = snapshotValue["bidders"] as? [[String:Any]] { bidders = biddersArray.flatMap{Bidder(dict:$0)} } ref = snapshot.ref}EDITED:class Bidder { var bidderId: Int var bidderName: String var bidderEmail: String var bidderPhone : String var modeOfPayment: Int var bidderBankName: String var bidderBankAcno: String var bidderIfscCode: String var paymentArray : [[String:String]]? var chitrefArray : [String]? var ref: FIRDatabaseReference? convenience init?(dict:[String:Any]) { guard let bidderId = dict["bidderId"] as? Int, let bidderName = dict["bidderName"] as? String, let bidderEmail = dict["bidderEmail"] as? String, let bidderPhone = dict["bidderPhone"] as? String, let modeOfPayment = dict["paymentType"] as? Int, let bidderBankName = dict["bankName"] as? String, let bidderBankAcno = dict["bankAccNumber"] as? String, let bidderIfscCode = dict["bankIFSC"] as? String else { return nil } self.init(bidderId: bidderId, bidderName: bidderName, bidderEmail: bidderEmail, bidderPhone: bidderPhone, modeOfPayment: modeOfPayment, bidderBankName: bidderBankName, bidderBankAcno: bidderBankAcno, bidderIfscCode: bidderIfscCode, paymentArray: [[]], chitrefArray: []) } init(bidderId: Int, bidderName: String,bidderEmail: String, bidderPhone: String, modeOfPayment: Int, bidderBankName: String, bidderBankAcno: String, bidderIfscCode: String,paymentArray: [[String:String]], chitrefArray: [String]) { self.bidderId = bidderId self.bidderName = bidderName self.bidderEmail = bidderEmail self.bidderPhone = bidderPhone self.modeOfPayment = modeOfPayment self.bidderBankName = bidderBankName self.bidderBankAcno = bidderBankAcno self.bidderIfscCode = bidderIfscCode self.paymentArray = paymentArray self.chitrefArray = chitrefArray self.ref = nil } init(snapshot: FIRDataSnapshot) { let snapshotValue = snapshot.value as! [String: AnyObject] bidderId = snapshotValue["bidderId"] as! Int bidderName = snapshotValue["bidderName"] as! String bidderEmail = snapshotValue["bidderEmail"] as! String bidderPhone = snapshotValue["bidderPhone"] as! String modeOfPayment = snapshotValue["modeOfPayment"] as! Int bidderBankName = snapshotValue["bidderBankName"] as! String bidderBankAcno = snapshotValue["bidderBankAcno"] as! String bidderIfscCode = snapshotValue["bidderIfscCode"] as! String paymentArray = snapshotValue["paymentArray"] as? [[String : String]] chitrefArray = snapshotValue["chitrefArray"] as? [String] ref = snapshot.ref } func toAnyObject() -> Any { return [ "bidderId" : bidderId, "bidderName" : bidderName, "bidderEmail": bidderEmail, "bidderPhone": bidderPhone, "modeOfPayment": modeOfPayment, "bidderBankName":bidderBankName, "bidderBankAcno": bidderBankAcno, "bidderIfscCode":bidderIfscCode, "paymentArray": paymentArray as Any, "chitrefArray" : chitrefArray as Any ] }} 这篇关于Firebase iOS Swift致命错误：NSArray元素无法与Swift数组元素类型匹配的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！