在焦点事件上显示jquery ui自动完成列表

Question

这是我的代码,有什么不对吗？它似乎没有在焦点上显示列表,我仍然需要在显示列表之前按一个键

<link media="all" type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/themes/smoothness/jquery-ui.css" rel="stylesheet"/>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/jquery-ui.min.js"></script>

<script type="text/javascript">
    $(function() {
        $('#id').autocomplete({
            source: ["ActionScript",
                        "AppleScript",
                        "Asp",
                        "BASIC",
                        "C",
                        "C++",
                        "Clojure",
                        "COBOL",
                        "ColdFusion",
                        "Erlang",
                        "Fortran",
                        "Groovy",
                        "Haskell",
                        "Java",
                        "JavaScript",
                        "Lisp",
                        "Perl",
                        "PHP",
                        "Python",
                        "Ruby",
                        "Scala",
                        "Scheme"
                    ],
            minLength: 0
        });
    }).focus(function(){            
            $(this).trigger('keydown.autocomplete');
    });
</script>


<input type="text" id="id">

Answer 1

这在焦点时直接调用具有默认值的搜索方法.

http://jsfiddle.net/steelywing/ubugC/

$("input").autocomplete({
    source: ["Apple", "Boy", "Cat"],
    minLength: 0,
}).focus(function () {
    $(this).autocomplete("search");
});

Answer 2

使其不止一次工作的解决方案

<script type="text/javascript">
    $(function() {
        $('#id').autocomplete({
            source: ["ActionScript",
                        /* ... */
                    ],
            minLength: 0
        }).focus(function(){     
            //Use the below line instead of triggering keydown
            $(this).data("autocomplete").search($(this).val());
        });
    });
</script>

Answer 3

看起来您将focus()处理程序附加到匿名函数而不是文本框.

试试这个:

<script type="text/javascript">
    $(function() {
        $('#id').autocomplete({
            source: ["ActionScript",
                        /* ... */
                    ],
            minLength: 0
        }).focus(function(){            
            // The following works only once.
            // $(this).trigger('keydown.autocomplete');
            // As suggested by digitalPBK, works multiple times
            // $(this).data("autocomplete").search($(this).val());
            // As noted by Jonny in his answer, with newer versions use uiAutocomplete
            $(this).data("uiAutocomplete").search($(this).val());
        });
    });
</script>

Answer 4

digitalPBK差不多......

他的解决方案不止一次工作,但是当您通过鼠标单击从列表中选择项目时,不会关闭下拉列表.在这种情况下,焦点会在您执行单击时返回到控件,因此在应该关闭它时会重新打开列表.

这是一个修复,它是唯一适用于我的方式,我认为它应该在使用autocomplete()函数的最新版本(1.8.11)时起作用.当控件获得焦点时,如果已经显示了下拉列表,则它不会显示全部焦点...

<script type="text/javascript"> 
    $(function() {
        $('#id').autocomplete({
            source: ["ActionScript",
                        /* ... */
                    ],
            minLength: 0
        }).focus(function () {
            if ($(this).autocomplete("widget").is(":visible")) {
                return;
            }
            $(this).data("autocomplete").search($(this).val());
        });
</script>

Answer 5

$(this).trigger('keydown.autocomplete'); 对我不起作用.

这就是我做的:

$('#id').on( "focus", function( event, ui ) {
    $(this).trigger(jQuery.Event("keydown"));
   // Since I know keydown opens the menu, might as well fire a keydown event to the element
});

Answer 6

使用最新版本时，您可能需要将自动完成功能更改为uiAutocomplete

$(this).data("uiAutocomplete").search($(this).val());