//后台返回来的格式
indexList: [{
						
						A: [{
							"firstName": "不安",
							"id": "1",
							checked: false,
							disabled: false
						}, ]



					},
					{
						
						B: [{
								"firstName": "不安",
								"id": "2",
								checked: false,
								disabled: false
							},
							{
								"firstName": "不安2",
								"id": "3",
								checked: false,
								disabled: false
							},
						]
					},
					{
						
						C: [{
								"firstName": "不1安",
								"id": "4",
								checked: false,
								disabled: false
							},
							{
								"firstName": "不2安3",
								"id": "5",
								checked: false,
								disabled: false
							},
							{
								"firstName": "不1安3",
								"id": "6",
								checked: false,
								disabled: false
							},
							{
								"firstName": "不0安3",
								"id": "7",
								checked: false,
								disabled: false
							},
						]
					},
					{
						
						D: [{
								"firstName": "不0安",
								"id": "8",
								checked: false,
								disabled: false
							},
							{
								"firstName": "不1安3",
								"id": "9",
								checked: false,
								disabled: false
							},
							{
								"firstName": "不1安3",
								"id": "10",
								checked: false,
								disabled: false
							},
							{
								"firstName": "不0安3",
								"id": "11",
								checked: false,
								disabled: false
							},
						]
					}
				]
			}

		<u-checkbox-group @change="checkboxGroupChange">
			<u-index-list :scrollTop="scrollTop">
				<view v-for="(item, index) in indexList" :key="index">
					<view v-for="(children,key) in item">
						<u-index-anchor :index="key" />
						<u-checkbox @change="checkboxChange" v-model="item.checked" v-for="    (item,_index) in children" :key="item.id" :name="item.firstName" class="list-cell" shape='circle' active-color='#00c0a6'>
							{{item.firstName}}</u-checkbox>
					</view>
				</view>
			</u-index-list>
		</u-checkbox-group>