ios - 在 badoo/Chatto 聊天文本上填充 api 数据时无法访问 alamofire 请求范围之外的模型对象数据

Question

以前我在类里面的任何地方都成功地访问了模型对象，但是在 badoo/chatto TextView 上填充数据时我被卡住了。 我正在将聊天消息 api 集成到 badoo 聊天 View 中

基本上，问题是 alamofire 响应没有超出范围。

我是否尝试过编译处理程序但没有成功？有什么办法可以解决这个问题吗？

提前致谢。

这是代码片段:

import Foundation
import Chatto
import ChattoAdditions
import SwiftyJSON
import Alamofire

class DemoChatMessageFactory {
    public static var chats = [ChatModel]()

    class func makeMessage(_ uid:String) -> DemoTextMessageModel{
        print("uid makeMessage : \(uid)")
        return self.makeMessageData(uid, isIncoming:false)
    }

    class func makeMessageData(_ uid: String,isIncoming:Bool) -> DemoTextMessageModel {
        if isIncoming == true{
            return self.makeTextFinalMessage(uid, isIncoming:isIncoming)
        } else {
            return self.makeTextFinalMessage(uid, isIncoming: isIncoming)
        }
    }

    public class func makeTextMessage(_ uid: String, isIncoming: Bool,text:String) -> DemoTextMessageModel {
        let messageModel = self.makeMessageModel(uid, isIncoming: isIncoming,
                                                 type: TextMessageModel<MessageModel>.chatItemType)
        let textMessageModel = DemoTextMessageModel(messageModel:messageModel,
                                                    text: text)
        return textMessageModel
    }

    public class func makeTextFinalMessage(_ uid: String, isIncoming: Bool) -> DemoTextMessageModel {
        var text = String()
        var uidInt  = Int(uid)

        print("string uid 121 \(uid)")
        print("print is Incomming data or not 1: \(isIncoming)")
        print("uid count :\(uid.count)")
        let urlString = "[My message Api]"

        Alamofire.request(urlString, method: .get).validate().responseJSON {
            (response) -> Void in
            if let value = response.data {
                do {
                    let json = try JSON(data: value)
                    if let dictionnary = json.dictionaryObject {
                        if let messageArray = dictionnary["message"] as?[[String: Any]] {
                            self.chats.removeAll()
                            for arr in messageArray {
                                self.chats.append(ChatModel(ChatListJSON: arr))
                            }
                        }
                    }
                } catch {
                    print("cannot convert to Json")
                }
            }

            print("print int 122 : \(uidInt!)")
            print("Chat List Id DemoChatMessageFactory \(self.chats[uidInt!].chatId)")
            print("chat message: \(String(describing: uidInt!)) th \(self.chats[uidInt!].chatMessage)")
            self.textData = "\(self.chats[uidInt!].chatMessage)"

            self.makeTextMessage(uid, isIncoming: isIncoming, text:self.textData) //Here I am bale to pass textData but ouside the Alamofire block can't access
        }

        //Here getting empty values
        print("uid makeTextFinalMessage \(uid)")
        print("in coming makeTextFinalMessage \(isIncoming)")
        print("text makeTextFinalMessage \(text)")

        //chat count also getting zero count
        print("chat count final text\(chats.count)")

        print("print chat count : \(self.chats.count)")

        return self.makeTextMessage(uid, isIncoming: isIncoming, text:self.textData)
    }
}

完成处理程序测试

public var res: Any = ""
func getAllChatData(completionhandler:@escaping ([String: Any]?) -> ()){
    let URL = "my api"
    Alamofire.request(URL).responseJSON {
        response in
        if let json = response.result.value as? [String: Any] {
            completionhandler(json, nil)
        }
        else if let error = response.result.error as Error? {
            completionhandler(nil, error)
        }
    }
}

然后在函数内部使用如下调用

DemoChatMessageFactory.getAllChatData {
    (result) in
    res = result
    print("response (res)")
}

请建议我使用编译处理程序使用 alamofire 的正确方法

Answer 1

这是一个使用异步调用的结果转换所有方法的例子。因为我从未使用过 Chatto 并且您没有在您的代码中显示所有类型，所以您可能需要修改我的代码的许多部分，但我相信您可以看到您需要用它做什么代码。

import Foundation
import Chatto
import ChattoAdditions
import SwiftyJSON
import Alamofire

class DemoChatMessageFactory {
    public static var chats = [ChatModel]()

    class func requestMessage(_ uid:String,
                           completion: @escaping (DemoTextMessageModel?, Error?)->Void) {
        print("uid makeMessage : \(uid)")
        self.requestMessageData(uid, isIncoming: false) { (model, error) in
            completion(model, error)
        }
    }

    class func requestMessageData(_ uid: String, isIncoming: Bool,
                               completion: @escaping (DemoTextMessageModel?, Error?)->Void) {
        if isIncoming {
            //...put any code needed when isIncoming is true
            self.requestTextFinalMessage(uid, isIncoming: isIncoming) { model in
                completion(model, error)
            }
        } else {
            //...put any code needed when isIncoming is false
            self.requestTextFinalMessage(uid, isIncoming: isIncoming) { model in
                completion(model, error)
            }
        }
    }

    public class func makeTextMessage(_ uid: String, isIncoming: Bool, text: String) -> DemoTextMessageModel {
        let messageModel = self.makeMessageModel(uid, isIncoming: isIncoming,
                                                 type: TextMessageModel<MessageModel>.chatItemType)
        let textMessageModel = DemoTextMessageModel(messageModel:messageModel,
                                                    text: text)
        return textMessageModel
    }

    public class func requestTextFinalMessage(_ uid: String, isIncoming: Bool,
                                           completion: @escaping (DemoTextMessageModel?, Error?)->Void) {
        var text = String()
        var uidInt  = Int(uid)

        print("string uid 121 \(uid)")
        print("print is Incomming data or not 1: \(isIncoming)")
        print("uid count :\(uid.count)")
        let urlString = "[My message Api]"

        Alamofire.request(urlString, method: .get).validate().responseJSON {
            (response) -> Void in
            if let value = response.data {
                do {
                    let json = try JSON(data: value)
                    if let dictionnary = json.dictionaryObject {
                        if let messageArray = dictionnary["message"] as?[[String: Any]] {
                            self.chats.removeAll()
                            for arr in messageArray {
                                self.chats.append(ChatModel(ChatListJSON: arr))
                            }
                        }
                    }

                    print("print int 122 : \(uidInt!)")
                    print("Chat List Id DemoChatMessageFactory \(self.chats[uidInt!].chatId)")
                    print("chat message: \(String(describing: uidInt!)) th \(self.chats[uidInt!].chatMessage)")
                    self.textData = "\(self.chats[uidInt!].chatMessage)"

                    completion(self.makeTextMessage(uid, isIncoming: isIncoming, text: self.textData), nil)
                } catch {
                    print("cannot convert to Json")
                    completion(nil, error)
                }
            } else {
                //better generate an error case result, and call completion.
                //...
            }
        }
    }
}

我将一些方法名称从 make... 更改为 request... 以表明它们是异步方法。

以及用法，如果您打算将原始代码用作:

let model = DemoChatMessageFactory.makeMessage(uid)
//Do some UI updates using `model`...

您可能需要使用异步方法，例如:

DemoChatMessageFactory.requestMessage(uid) { (model, error) in
    if let model = model {
        //Do some UI updates using `model`...
    } else {
        //Do something for the error...
    }
}