jQuery UI .position() 不工作

Question

我正在尝试设置 <span> 的位置使用 jQuery UI 的 .position() 元素功能，但我无法让它工作。我希望它们紧挨着可排序的列表元素 <ul> .

这是我的 HTML 结构:

<div id="#tabs-settings-wrapper">
    <p>You can order them by drag and drop.</p>
    <ul id="tabs-sortable">
        <li class="ui-state-default tabs-sortable-item" id="tab-0" data-position="0">overview</li>
        <li class="ui-state-default tabs-sortable-item" id="tab-1" data-position="1">detail 1</li>
        <li class="ui-state-default tabs-sortable-item" id="tab-2" data-position="2">detail 2</li>
    </ul>

    <button id="tabs-add-new-button">Add new</button>

    <!-- These are created dynamically, see JavaScript below -->
    <span id="tab-0-remove-icon" class="tabs-remove-icon fa fa-trash fa-lg" data-position="0"></span>
    <span id="tab-1-remove-icon" class="tabs-remove-icon fa fa-trash fa-lg" data-position="1"></span>
    <span id="tab-2-remove-icon" class="tabs-remove-icon fa fa-trash fa-lg" data-position="2"></span>

</div>

和我的 JavaScript 代码:

 $(function () {
    $("#tabs-sortable").sortable({
        placeholder: "ui-state-highlight"
    });

    // add remove icons to every li
    $(".tabs-sortable-item").each(function () {
        var position = $(this).data("position");
        var id = "#" + $(this).prop("id");
        var removeIconID = '#tab-' + position + '-remove-icon';
        $('<span id="tab-' + position + '-remove-icon" class="tabs-remove-icon fa fa-trash fa-lg" data-position="' + position + '"></span>').appendTo("#tabs-settings-wrapper");
        $(removeIconID).position({
            my: "right",
            at: "left",
            of: id,
            collision: "none"
        });
    });

    $("#tabs-add-new-button").button().click(function () {
        // numbering seems strange, but is more human-like (and logical)
        var maxPosition = $(".tabs-sortable-item").length - 1;
        var newPosition = maxPosition + 1;

        $('<li class="ui-state-default tabs-sortable-item" id="tab-' + newPosition + '">' +
            '<input id="tabs-add-new-input" style="margin-top: -5px;" placeholder="Enter a name" />' +
        '</li>').appendTo("#tabs-sortable");

        $('<button class="tabs-add-new-save-button" id="tab-' + newPosition + '-save-button" data-position="' + newPosition + '">Save</button>').appendTo("#tabs-settings-wrapper");
        $("#tab-" + String(newPosition) + "-save-button").button();
        $("#tab-" + String(newPosition) + "-save-button").position({
            my: "left",
            at: "right+20px",
            of: "#tab-" + String(newPosition) + ""
        });

        $('<button class="tabs-add-new-cancel-button" id="tab-' + newPosition + '-cancel-button" data-position="' + newPosition + '">Cancel</button>').appendTo("#tabs-settings-wrapper");
        $("#tab-" + String(newPosition) + "-cancel-button").button();
        $("#tab-" + String(newPosition) + "-cancel-button").position({
            my: "left",
            at: "right+10px",
            of: "#tab-" + String(newPosition) + "-save-button"
        });

        var li = $("#tabs-sortable li");
        var innerWidth = li.innerWidth();
        var paddingLeft = li.css("padding-left").substring('p')[1];
        var paddingRight = li.css("padding-right").substring('p')[1];
        $(".tabs-sortable-item input").last().focus().css("width", (innerWidth - (paddingLeft + paddingRight)));

        $("#tabs-sortable").sortable("refresh");

        // prevent the user from adding multiple list items at once
        $("#tabs-add-new-button").button("disable");
    });

});

但是它们出现在 add new 按钮之后(它们是用 HTML 代码编写的)，而不是我希望它们出现的位置:

编辑:

我在单击添加新 按钮时添加了两个按钮，并且定位它们似乎有效。我将此代码添加到 JavaScript 部分。这是它的样子:

Answer 1

我认为你应该避免在这种情况下使用 position，因为 ul 列表。

我宁愿在每个 li 中添加一个 span 并在必要时通过代码更新/隐藏它。

<div id="#tabs-settings-wrapper">
    <p>You can order them by drag and drop.</p>
    <ul id="tabs-sortable">
        <li class="ui-state-default tabs-sortable-item" id="tab-0" data-position="0">
            overview 
            <span id="tab-0-remove-icon" class="tabs-remove-icon fa fa-trash fa-lg" data-position="0"></span>
        </li>
        <li class="ui-state-default tabs-sortable-item" id="tab-1" data-position="1">
            detail 1
            <span id="tab-1-remove-icon" class="tabs-remove-icon fa fa-trash fa-lg" data-position="1"></span>
        </li>
        <li class="ui-state-default tabs-sortable-item" id="tab-2" data-position="2">
            detail 2
            <span id="tab-2-remove-icon" class="tabs-remove-icon fa fa-trash fa-lg" data-position="2"></span>
        </li>
    </ul>
    <button id="tabs-add-new-button">Add new</button>
</div>

或者直接在li中添加带有代码的span(通过document.getElementById("tab-1").appendChild(span); 例如)。