我试图理解renderItem
和renderItemData
之间的区别。
我找不到相关的相关文档。
我有以下代码:
$.widget( "custom.catcomplete", $.ui.autocomplete, {
_renderMenu: function( ul, items ) {
var that = this,
currentCategory = "";
$.each( items, function( index, item ) {
if ( item.category != currentCategory ) {
ul.append( "<li class='ui-autocomplete-category'>" + item.category + "</li>" );
currentCategory = item.category;
}
// with following code, when an element is selected
// in menu list, the corresponding value appears in searchbox
that._renderItemData( ul, item );
// with following code, when an element is selected
// in menu list, the corresponding value does NOT appear in searchbox
// I override renderItem below
**// that._renderItem( ul, item );**
});
}
});
function handleSearchBox() {
var data = [
{ label: "JAMES", category: "PEOPLE" },
];
$( "#search" ).catcomplete({
delay: 0,
source: data,
select: function(event, ui) {
event.preventDefault();
str = JSON.stringify(ui)
// with renderItemData, str = item in source data
// with renderItem str = {}
alert(str)
var selectedObj = ui.item.label
$("#search").val(selectedObj);
}
});
$("#search").data("custom-catcomplete")._renderItem = function(ul, item) {
return $("<li></li>").data("item.autocomplete", item)
.append("<a>" + item.label + "</a>")
.appendTo(ul);
};
}
我的目标是自定义样式菜单li项目。我不知道我哪里出错了。
答案 0 :(得分:14)
renderItem
构建要附加到结果列表的实际列表项(<li>
)
renderItemData
只是一个调用renderItem
的包装器方法,并将关联的数据(标签和值)存储到创建的元素中。稍后在从建议框中导航和选择以及选项时使用此数据。
您会发现两者的源代码非常简单:
_renderItemData: function( ul, item ) {
return this._renderItem( ul, item ).data( "ui-autocomplete-item", item );
},
_renderItem: function( ul, item ) {
return $( "<li>" )
.append( $( "<a>" ).text( item.label ) )
.appendTo( ul );
},
您应该注意_renderMenu
实际上是_renderItemData
:
_renderMenu: function( ul, items ) {
var that = this;
$.each( items, function( index, item ) {
that._renderItemData( ul, item );
});
},