我可以在Swift代码中运行JavaScript吗？ [英] Can I run JavaScript inside Swift code?

问题描述

我需要在Swift代码中包含JavaScript代码以便能够调用signalR聊天，这可能吗？如果没有，我可以转换吗？

I need to include JavaScript code in Swift code to be able to call a signalR chat, is that possible? If not, can I convert it?

sendmessage 是一个按钮。

$(function () {
    // Declare a proxy to reference the hub.
    var chat = $.connection.chatHub;
    // Create a function that the hub can call to broadcast messages.
    chat.client.broadcastMessage = function (name, message) {
        // some code
    };

    // Start the connection.
    $.connection.hub.start().done(function () {
        $('#sendmessage').click(function () {
            // Call the Send method on the hub.
            chat.server.send('name', 'message');
        });
    });
});

和 signalr 代码是：

    public void Send(string name, string message)
    {
        // Call the broadcastMessage method to update clients. 
        Clients.All.broadcastMessage(name, message);
    }

更新＃1：

稍微改变了一下问题，所以每个@MartinR都不会混淆

changed question a little bit so it is not confusing per @MartinR

推荐答案

你可以在Swift中运行JavaScript！

You can run JavaScript inside Swift!

以下是您可以在Playground中运行的示例，以帮助您入门：

Here is an example you can run in Playground to get you started:

import JavaScriptCore

let jsSource = "var testFunct = function(message) { return \"Test Message: \" + message;}"

var context = JSContext()
context?.evaluateScript(jsSource)

let testFunction = context?.objectForKeyedSubscript("testFunct")
let result = testFunction?.call(withArguments: ["the message"])

result 将是测试消息：消息。

您还可以在 WKWebView 调用评估Java脚本（_：完成处理程序:) 。

您还可以在 UIWebView ，致电 string By评估Java脚本（来自：），但请注意该方法已被弃用并标记为iOS 2.0-12.0。

You can also run JavaScript within a UIWebView by calling string​By​Evaluating​Java​Script(from:​), but note that that method has been deprecated and is marked as iOS 2.0–12.0.

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