在初始化之前无法在可拖动对象上调用方法 [英] cannot call methods on draggable prior to initialization

问题描述

我正在尝试销毁jQuery UI的可拖动实例，但收到无法调用方法"错误.

I'm trying to destroy an instance of jQuery UI's draggable, but I'm receiving a 'cannot call method' error.

我的代码

$('table.paper tr').draggable({
    helper: 'clone',
    create: function(event, ui) {
        $('body').on('click', '[data-action="edit-ingredients"]', function(event) {
            event.preventDefault();
            $('table.paper').draggable('destroy');
        });
    },
    start: function(event, ui) {
        c.tr = this;
        c.helper = ui.helper
        $(this).hide();
    },
    drag: function(event, ui) {
        var collides = $('table.paper').overlaps($(c.helper));
        if (collides.hits.length) {
            $(c.helper).removeClass('delete');
        } else {
            $(c.helper).addClass('delete');
        }
    }
});

错误
Error: cannot call methods on draggable prior to initialization; attempted to call method 'destroy' http://code.jquery.com/jquery-1.11.0.min.js Line 2

The error
Error: cannot call methods on draggable prior to initialization; attempted to call method 'destroy' http://code.jquery.com/jquery-1.11.0.min.js Line 2

在逻辑说话"中，此错误告诉我我的代码流程不正确，因为在尝试销毁jQuery UI时，它不会启动jQuery UI的可拖动对象-但是，正如您所看到的，我正在其中创建事件监听器可拖动对象的创建"事件.

In 'logic speak', this error is telling me my flow of code isn't correct as jQuery UI's draggable isn't initiated when I attempt to destroy it - however, as you can see I am creating the event listener within the draggable's 'create' event.

推荐答案

您正在使用选择器$('table.paper tr')实例化可拖动对象，然后使用其他选择器$('table.paper')销毁可拖动对象，我认为这不是可拖动元素.

you are instantiating a draggable with selector $('table.paper tr') then destroying a draggable with a different selector $('table.paper') which i assume is not a draggable element.

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