选择匹配行以传递数据

Question

我看过所有这些Swift，asp.net和javascript问题。

1 2 3 4 5

目标：
当我从聊天消息列表中选择一条消息时，MessageListController我希望下一个打开的会话ChatDetailController成为所选的会话。

我在这个iOS图像中为WatchKit应用做同样的事情。选择与Sophia的消息，并打开与Sophia的聊天。[！[在此处输入图片描述] [6]] [6]

我想传递json“ message_id”即chatMessageId属性。我已经经过chatMessageId从MessageModel到ChatDetailController，你可以在代码中看到。

它是对chatMessageId的ChatModel，我需要通过？还是我已经传递了所需的数据？

传递的上下文：可选（HTWatch_Extension.MessageModel（合作伙伴：“ 9859”，昵称：“马可”，消息：“您看到过狗吗？”，城市：“马德里”，countryBadgeImageURL：https：//i.imgur.com/ PJcyle7.jpg，messageListImageURL：https ://i.imgur.com/PJcyle7.jpg，chatMessageId：“ Tva9d2OJyWHRC1AqEfKjclRwXnlRDQ”，状态：“离线”））

尝试： 我是否需要采取做-catch块，我解析ChatModel出的ChatDetailController的awakeWithContext方法，并把它的didSelectRowAt方法MessageListController？

MessageListController

// ...code...

var messageObject = [MessageModel]()
var chatObject = [ChatModel]()

// ...code...

override func table(_ table: WKInterfaceTable, didSelectRowAt rowIndex: Int) {

    var messageContext = messageObject[rowIndex]
    var chatContext = chatObject[rowIndex]

    do {
        guard let fileUrl = Bundle.main.url(forResource: "Chats", withExtension: "json") else {
            print("File could not be located")
            return
        }
        let data = try Data(contentsOf: fileUrl)
        let decoder = JSONDecoder()

        let msg = try decoder.decode([ChatModel].self, from: data)
        self.chatObject = msg

    } catch let error {
        print(error)
    }

    messageContext.chatMessageId = (chatObject as AnyObject).filter { (dictionaryTemp:[String:String]) -> Bool in
        return dictionaryTemp["message_id"] == chatContext.chatMessageId
    } 

    // WatchKit's model presentation method.
    presentController(withName: "ChatDetailController", context: messageContext)
}

Answer 1

如果我理解正确的话，您的Chat.json, 将会有所有消息 ID 的聊天。选择消息 ID 行之一并加载相应的聊天历史记录。

在这种情况下，您可以使用基于消息进行解析filter。假设你有这样的字典。

例子：

let responseString = "{\"name\":\"Tom\"}"

if let responseData = responseString.data(using: .utf8){
    do {

    let object = try JSONSerialization.jsonObject(with:responseData , options: .allowFragments)
    print("Response Object=\(object)")
    } catch{
        print("parsing Error=\(error)")
    }
}

您可以使用类似的代码来创建对象。最终的对象应该是这样的chatDictionary

let chatDictionary = [
[
    "fromId": "zz1234skjksmsjdfwe2zz",
    "toId": "qq43922sdkfjsfmmxdfqq",
    "messageText": "Have you seen is dog?",
    "imageUrl": "https://i.imgur.com/PJcyle7.jpg",
    "message_id": "Tva9d2OJyWHRC1AqEfKjclRwXnlRDQ",
    "read": "true"
    ],
[
    "fromId": "zz1234skjksmsjdfwe2zz",
    "toId": "qq43922sdkfjsfmmxdfqq",
    "messageText": "Yes I have. It's cute.",
    "imageUrl": "https://i.imgur.com/PJcyle7.jpg",
    "message_id": "Tva9d2OJyWHRC1AqEfKjclRwXnlRDQ",
    "read": "true"
    ],
[
    "fromId": "zz1234skjksmsjdfwe2zz",
    "toId": "qq43922sdkfjsfmmxdfqq",
    "messageText": "I want to get a pet too.",
    "imageUrl": "https://i.imgur.com/PJcyle7.jpg",
    "message_id": "Tva9d2OJyWHRC1AqEfKjclRwXnlRDQ1",
    "read": "true"
    ]
]

您所做的选择索引处的行

    override func table(_ table: WKInterfaceTable, didSelectRowAt rowIndex: Int) {

            let message = messageObjects[rowIndex]
            // Create a chat object Dictionary, parse it before you pass it to the detail View Controller , if you have the chat.json.
// I have used 'Tva9d2OJyWHRC1AqEfKjclRwXnlRDQ', but here you can your message id property to make it dynamic
            message.chatObjects= chatDictionary.filter { (dictionaryTemp:[String : String]) -> Bool in
            return dictionaryTemp["message_id"] == "Tva9d2OJyWHRC1AqEfKjclRwXnlRDQ"
        }
            presentController(withName: "ChatDetailController", context: message)
        }