如何从gwt调用jquery触发器？ [英] How to call jquery trigger from gwt?

问题描述

  public static native void doConnect() /*-{
            $wnd.jQuery(document).trigger('connect',
                    {
                    jid: 'sss',
                    password: 'sss'
                }

                );

        }-*/;

我试过上面的，但是在firebug或gwt托管模式下没有错误
console （所以我不知道代码是否成功）。我可能知道这是调用jquery触发器的正确​​方法吗？但是当我把alert（）放在bind（'connect'）中时，它并没有在.js文件中被称为 b
$ b

i tried the above ,but there is no error in firebug or gwt hosted mode console(so i cannot know whether the code is success or not). may i know is this the correct way to call jquery trigger? but when i put alert() in bind('connect'), it was not called

    $(document).bind('connect', function (ev, data) { 
alert('not call.....at all');

        var conn = new Strophe.Connection(
            "http://bosh/xmpp-httpbind");

        conn.connect(data.jid, data.password, function (status) {
            if (status === Strophe.Status.CONNECTED) {
                $(document).trigger('connected');
            } else if (status === Strophe.Status.DISCONNECTED) {
                $(document).trigger('disconnected');
            }
        });

        Hello.connection = conn;
    });

推荐答案

在控制台/开发模式下没有错误，但代码没有像我想要的那样行为。原因是jQuery（和这样的框架）扩展/改变了JavaScript的许多核心元素，并期望它保持这种方式 - 然而，GWT代码（也就是JSNI的东西）是从一个干净的iframe执行的（所以不需要外部框架可能会混淆语言并在GWT中导致一些奇怪的错误，这就是为什么您必须通过 $ wnd ）引用主窗口。

I had similar issues when using jQuery UI with GWT - no errors in console/dev mode, yet the code did not behave like I wanted. The reason was that jQuery (and such frameworks) extend/change many core elements of JavaScript and expect it to stay that way - however, GWT code (meaning, also JSNI stuff) is executed from a "clean" iframe (so that no external frameworks can mess with the language and cause some weird errors in GWT, that's why you have to reference to the main window via $wnd).

我建议将您的 doConnect 函数移动到主机页面（或者链接到主机页面的外部js文件），而不是从该函数调用你的JSNI存根：

I'd suggest moving your doConnect function to the host page (or external js file linked to the host page) and instead just call that function from your JSNI stub:

public static native void doConnect() /*-{
   $wnd._doConnect('sss','sss'); //_doConnect defined in the host page
}-*/;

或者提供辅助函数，它们将从主机页面返回数组等等，以便它们包含所有jQuery所做的和期望的更改。

Or provide helper functions that will return Arrays, etc, from the host page, so that they include all the changes that jQuery made and expects.

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