# List List是用来显示列表的组件,包含一系列相同宽度的列表项,适合连续、多行地呈现同类数据。具体用法请参考[List API](../reference/arkui-js/js-components-container-list.md)。 ## 创建List组件 在pages/index目录下的hml文件中创建一个List组件。 ``` <!-- index.hml --><div class="container"> <list> <list-item class="listItem"></list-item> <list-item class="listItem"></list-item> <list-item class="listItem"></list-item> <list-item class="listItem"></list-item> </list></div> ``` ``` /* xxx.css */ .container { flex-direction: column; align-items: center; background-color: #F1F3F5; } .listItem{ height: 20%; background-color:#d2e0e0; margin-top: 20px; } ```  >  **说明:** > - <list-item-group>是<list>的子组件,实现列表分组功能,不能再嵌套<list>,可以嵌套<list-item>。 > > - <list-item>是<list>的子组件,展示列表的具体项。 ## 添加滚动条 设置scrollbar属性为on即可在屏幕右侧生成滚动条,实现长列表或者屏幕滚动等效果。 ``` <!-- index.hml --><div class="container"> <list class="listCss" scrollbar="on" > <list-item class="listItem"></list-item> <list-item class="listItem"></list-item> <list-item class="listItem"></list-item> <list-item class="listItem"></list-item> <list-item class="listItem"></list-item> <list-item class="listItem"></list-item> </list></div> ``` ``` /* index.css */ .container { flex-direction: column; background-color: #F1F3F5; } .listItem{ height: 20%; background-color:#d2e0e0; margin-top: 20px; } .listCss{ height: 100%; scrollbar-color: #8e8b8b; scrollbar-width: 50px; } ```  ## 添加侧边索引栏 设置indexer属性为自定义索引时,索引栏会显示在列表右边界处,indexer属性设置为true,默认为字母索引表。 ``` <!-- index.hml --><div class="container"> <list class="listCss" indexer="{{['#','1','2','3','4','5','6','7','8']}}" > <list-item class="listItem" section="#" ></list-item> </list></div> ``` ``` /* index.css */.container{ flex-direction: column; background-color: #F1F3F5; } .listCss{ height: 100%; flex-direction: column; columns: 1} ```  >  **说明:** > - indexer属性生效需要flex-direction属性配合设置为column,且columns属性设置为1。 > > - indexer可以自定义索引表,自定义时"\#"必须要存在。 ## 实现列表折叠和展开 为List组件添加groupcollapse和groupexpand事件实现列表的折叠和展开。 ``` <!-- index.hml --> <div class="doc-page"> <list style="width: 100%;" id="mylist"> <list-item-group for="listgroup in list" id="{{listgroup.value}}" ongroupcollapse="collapse" ongroupexpand="expand"> <list-item type="item" style="background-color:#FFF0F5;height:95px;"> <div class="item-group-child"> <text>One---{{listgroup.value}}</text> </div> </list-item> <list-item type="item" style="background-color: #87CEFA;height:145px;" primary="true"> <div class="item-group-child"> <text>Primary---{{listgroup.value}}</text> </div> </list-item> </list-item-group> </list> </div> ``` ``` /* index.css */ .doc-page { flex-direction: column; background-color: #F1F3F5; } list-item{ margin-top:30px; } .top-list-item { width:100%; background-color:#D4F2E7; } .item-group-child { justify-content: center; align-items: center; width:100%; } ``` ``` // xxx.js import prompt from '@system.prompt'; export default { data: { direction: 'column', list: [] }, onInit() { this.list = [] this.listAdd = [] for (var i = 1; i <= 2; i++) { var dataItem = { value: 'GROUP' + i, }; this.list.push(dataItem); } }, collapse(e) { prompt.showToast({ message: 'Close ' + e.groupid }) }, expand(e) { prompt.showToast({ message: 'Open ' + e.groupid }) } } ```  >  **说明:** > - groupcollapse和groupexpand事件仅支持list-item-group组件使用。 ## 场景示例 在本场景中,开发者可以根据字母索引表查找对应联系人。 ``` <!-- index.hml --> ``` ``` <div class="doc-page"> <text style="font-size: 35px; font-weight: 500; text-align: center; margin-top: 20px; margin-bottom: 20px;"> <span>Contacts</span> </text> <list class="list" indexer="true"> <list-item class="item" for="{{namelist}}" type="{{$item.section}}" section="{{$item.section}}"> <div class="container"> <div class="in-container"> <text class="name">{{$item.name}}</text> <text class="phone">18888888888</text> </div> </div> </list-item> <list-item type="end" class="item"> <div style="align-items:center;justify-content:center;width:750px;"> <text style="text-align: center;">Total: 10</text> </div> </list-item> </list> </div> ``` ``` /* index.css */ .doc-page { flex-direction: column; background-color: #F1F3F5; } .list { width: 100%; height: 100%; } .item { height: 120px; padding-left: 10%; border-top: 1px solid #dcdcdc; } .name { color: #000000; font-size: 39px; } .phone { color: black; font-size: 25px; } .container { flex-direction: row; align-items: center; } .in-container { flex-direction: column; justify-content: space-around; } ``` ``` // xxx.js export default { data: { namelist:[{ name: 'Zoey', section:'Z' },{ name: 'Quin', section:'Q' },{ name:'Sam', section:'S' },{ name:'Leo', section:'L' },{ name:'Zach', section:'Z' },{ name:'Wade', section:'W' },{ name:'Zoe', section:'Z' },{ name:'Warren', section:'W' },{ name:'Kyle', section:'K' },{ name:'Zaneta', section:'Z' }] }, onInit() { } } ``` 