在触发器上传递json数据 [英] passing json data on trigger

问题描述

我正在调用返回json数据的服务。

I am calling a service that return json data.

脚本：

$.ajax({
    type: "POST",
    url: "/some/service",
    dataType: "json",
    success: function(response) {
        if (response.status == "ok" && response.messages.length > 0) {

            // obj is a jQuery object
            obj.trigger(SOME_EVENT, response.messages);

        }
    }
});

这是回复示例：

{
  "status":"ok",
  "messages":[
     {"id":1,"message_text":"latihan"},
     {"id":123,"message_text":"hello"}]
}

当obj收到SOME_EVENT触发器时，我希望它传递下面的消息数据：

when obj received the SOME_EVENT trigger, I am expecting it to pass messages data below:

[{"id":1,"message_text":"latihan"},
 {"id":123,"message_text":"hello"}]

但当我将消息参数打印到控制台时，

but when I printed messages parameter to console,

// on receiving messages
obj.bind(SOME_EVENT, function(sender, messages) {
    console.log(messages);
});

结果，它只传递了下面的最后一条消息

turn out, it only passed the last message below

{"id":123,"message_text":"hello"}

任何人都可以解释为什么我的自定义事件没有传递消息数组？

anyone can explain why the array of messages is not passed by my custom event?

推荐答案

来自< a href =http://docs.jquery.com/Events/trigger =noreferrer> http://docs.jquery.com/Events/trigger ，<$ c的第二个参数$ c> trigger function是一个附加参数数组（在事件对象之后传递）。

From http://docs.jquery.com/Events/trigger, the second parameter to the trigger function is an array of additional arguments (passed after the event object).

response.messages property是一个数组，所以它们实际上作为单独的参数传递给你的处理程序：

The value of your response.messages property is an array, so they are actually passed along to your handler as separate arguments:

obj.bind(SOME_EVENT, function(sender, message1, message2/*, etc*/) {
    console.log(message1); // {"id":1,"message_text":"latihan"}
    console.log(message2); // {"id":123,"message_text":"hello"}
});

您可以将它们作为一个数组干净地收集：

You can collect them cleanly as one array with:

obj.bind(SOME_EVENT, function(sender) {
    var messages = Array.prototype.slice.call(arguments, 1);
    console.log(messages); // [{"id":1,"message_text":"latihan"},
                           //  {"id":123,"message_text":"hello"}]
});

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