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杨家亮
2026-03-25 14:54:15 +08:00
commit ab4646b43a
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uni_modules/uview-pro/components/u-index-list/types.ts
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import type { ExtractPropTypes, PropType } from 'vue';
import { getColor } from '../../';
/**
* u-index-list 组件 props 类型定义
* @description 通过折叠面板收纳内容区域,搭配<u-index-anchor>使用
*/
export const IndexListProps = {
/** 是否开启锚点自动吸顶 */
sticky: {
type: Boolean,
default: true
},
/** 锚点吸顶时的层级 */
zIndex: {
type: [Number, String] as PropType<number | string>,
default: ''
},
/** 当前滚动高度 */
scrollTop: {
type: [Number, String] as PropType<number | string>,
default: 0
},
/** 锚点自动吸顶时与顶部的距离 */
offsetTop: {
type: [Number, String] as PropType<number | string>,
default: 0
},
/** 索引字符列表 */
indexList: {
type: Array as PropType<string[]>,
default: undefined // 组件内用 getIndexList() 兜底
},
/** 锚点和右边索引字符高亮颜色 */
activeColor: {
type: String,
default: () => getColor('primary')
}
};
/**
* u-index-list 组件 props 类型
*/
export type IndexListProps = ExtractPropTypes<typeof IndexListProps>;
uni_modules/uview-pro/components/u-index-list/u-index-list.vue
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<template>
<!-- 支付宝小程序使用$u.getRect()获取组件的根元素尺寸，所以在外面套一个"壳" -->
<view>
<view class="u-index-bar">
<slot />
<view
v-if="showSidebar"
class="u-index-bar__sidebar"
@touchstart.stop.prevent="onTouchMove"
@touchmove.stop.prevent="onTouchMove"
@touchend.stop.prevent="onTouchStop"
@touchcancel.stop.prevent="onTouchStop"
>
<view
v-for="(item, index) in indexList"
:key="index"
class="u-index-bar__index"
:style="{ zIndex: Number(zIndex) + 1, color: activeAnchorIndex === index ? activeColor : '' }"
:data-index="index"
>
{{ item }}
</view>
</view>
<view
class="u-indexed-list-alert"
v-if="touchmove && indexList[touchmoveIndex]"
:style="{
zIndex: alertZIndex
}"
>
<text>{{ indexList[touchmoveIndex] }}</text>
</view>
</view>
</view>
</template>
<script lang="ts">
export default {
name: 'u-index-list',
options: {
addGlobalClass: true,
// #ifndef MP-TOUTIAO
virtualHost: true,
// #endif
styleIsolation: 'shared'
}
};
</script>
<script setup lang="ts">
import { ref, reactive, computed, watch, onMounted, getCurrentInstance } from 'vue';
import { $u, useParent } from '../..';
import { IndexListProps } from './types';
/**
* indexList 索引列表
* @description 通过折叠面板收纳内容区域,搭配<u-index-anchor>使用
* @tutorial https://uviewpro.cn/zh/components/indexList.html#indexanchor-props
* @property {Number|String} scroll-top 当前滚动高度，自定义组件无法获得滚动条事件，所以依赖接入方传入
* @property {Array} index-list 索引字符列表，数组（默认A-Z）
* @property {Number|String} z-index 锚点吸顶时的层级（默认965）
* @property {Boolean} sticky 是否开启锚点自动吸顶（默认true）
* @property {Number|String} offset-top 锚点自动吸顶时与顶部的距离（默认0）
* @property {String} highlight-color 锚点和右边索引字符高亮颜色（默认主题色primary）
* @event {Function} select 选中右边索引字符时触发
* @example <u-index-list :scrollTop="scrollTop"></u-index-list>
*/
const props = defineProps(IndexListProps);
const emit = defineEmits(['select']);
const instance = getCurrentInstance();
// 索引列表生成函数
function getIndexList() {
const indexList: string[] = [];
const charCodeOfA = 'A'.charCodeAt(0);
for (let i = 0; i < 26; i++) {
indexList.push(String.fromCharCode(charCodeOfA + i));
}
return indexList;
}
// 变量定义
const activeAnchorIndex = ref(0);
const showSidebar = ref(true);
const touchmove = ref(false);
const touchmoveIndex = ref(0);
const sidebar = reactive<{ height: number; top: number }>({ height: 0, top: 0 });
const scrollToAnchorIndex = ref<number | null>(null);
const timer = ref<any>(null);
const top = ref(0);
const height = ref(0);
const stickyOffsetTop = ref(0);
// 计算属性
// 弹出toast的z-index值
const alertZIndex = computed(() => $u.zIndex.toast).value;
// indexList 响应式
const indexList = computed(() => props?.indexList ?? getIndexList());
const zIndex = computed(() => props.zIndex).value;
const activeColor = computed(() => props.activeColor).value;
const { children, broadcast } = useParent('u-index-anchor');
// 兼容 H5/非H5 stickyOffsetTop
onMounted(() => {
const offsetTopNum = typeof props.offsetTop === 'string' ? Number(props.offsetTop) : props.offsetTop;
// #ifdef H5
stickyOffsetTop.value = offsetTopNum ? uni.upx2px(offsetTopNum) : 44;
// #endif
// #ifndef H5
stickyOffsetTop.value = offsetTopNum ? uni.upx2px(offsetTopNum) : 0;
// #endif
});
// 监听 scrollTop
watch(
() => props.scrollTop,
() => {
updateData();
}
);
function updateData() {
if (timer.value) clearTimeout(timer.value);
timer.value = setTimeout(() => {
showSidebar.value = !!children.length;
setRect().then(() => {
onScroll();
});
}, 0);
}
/**
* 获取各区域尺寸
*/
function setRect() {
return Promise.all([setAnchorsRect(), setListRect(), setSiderbarRect()]);
}
/**
* 获取锚点尺寸
*/
function setAnchorsRect() {
return Promise.all(
children.map((anchor, index) => {
$u.getRect('.u-index-anchor-wrapper', anchor.getInstance()).then((rect: any) => {
broadcast('setTop', rect.top, anchor.id);
broadcast('setHeight', rect.height, anchor.id);
});
})
);
}
/**
* 获取列表尺寸
*/
function setListRect() {
return $u.getRect('.u-index-bar', instance).then((rect: any) => {
height.value = rect.height;
top.value = rect.top + Number(props.scrollTop);
});
}
/**
* 获取侧边栏尺寸
*/
function setSiderbarRect() {
return $u.getRect('.u-index-bar__sidebar', instance).then((rect: any) => {
sidebar.height = rect.height;
sidebar.top = rect.top;
});
}
/**
* 获取当前激活锚点索引
*/
function getActiveAnchorIndex() {
const sticky = props.sticky;
for (let i = children.length - 1; i >= 0; i--) {
const preAnchorHeight = i > 0 ? children[i - 1].getExposed().height.value : 0;
const reachTop = sticky ? preAnchorHeight : 0;
if (reachTop >= children[i].getExposed().top.value) {
return i;
}
}
return -1;
}
/**
* 滚动时处理锚点吸顶和样式
*/
function onScroll() {
if (!children.length) return;
const sticky = props.sticky;
const scrollTopNum = Number(props.scrollTop);
const active = getActiveAnchorIndex();
activeAnchorIndex.value = active;
if (sticky) {
let isActiveAnchorSticky = false;
if (active !== -1) {
isActiveAnchorSticky = children[active].getExposed().top.value <= 0;
}
children.forEach((item, index) => {
if (index === active) {
let wrapperStyle: any = '';
let anchorStyle: any = {
color: `${activeColor}`
};
if (isActiveAnchorSticky) {
wrapperStyle = { height: `${children[index].getExposed().height.value}px` };
anchorStyle = {
position: 'fixed',
top: `${stickyOffsetTop.value}px`,
zIndex: `${zIndex ? zIndex : $u.zIndex.indexListSticky}`,
color: `${activeColor}`
};
}
broadcast('setActive', active, item.id);
broadcast('setAnchorStyle', anchorStyle, item.id);
broadcast('setWrapperStyle', wrapperStyle, item.id);
} else if (index === active - 1) {
const currentAnchor = children[index];
const currentOffsetTop = currentAnchor.getExposed().top.value;
const targetOffsetTop =
index === children.length - 1 ? top.value : children[index + 1].getExposed().top.value;
const parentOffsetHeight = targetOffsetTop - currentOffsetTop;
const translateY = parentOffsetHeight - currentAnchor.getExposed().height.value;
const anchorStyle = {
position: 'relative',
transform: `translate3d(0, ${translateY}px, 0)`,
zIndex: `${zIndex ? zIndex : $u.zIndex.indexListSticky}`,
color: `${activeColor}`
};
broadcast('setActive', active, currentAnchor.id);
broadcast('setAnchorStyle', anchorStyle, currentAnchor.id);
broadcast('setWrapperStyle', '', item.id);
} else {
broadcast('setActive', false, item.id);
broadcast('setAnchorStyle', '', item.id);
broadcast('setWrapperStyle', '', item.id);
}
});
}
}
/**
* 侧边栏触摸移动
*/
function onTouchMove(event: TouchEvent) {
touchmove.value = true;
const sidebarLength = children.length;
const touch = event.touches[0];
const itemHeight = sidebar.height / sidebarLength;
let clientY = touch.clientY;
let index = Math.floor((clientY - sidebar.top) / itemHeight);
if (index < 0) {
index = 0;
} else if (index > sidebarLength - 1) {
index = sidebarLength - 1;
}
touchmoveIndex.value = index;
scrollToAnchor(index);
}
/**
* 侧边栏触摸结束
*/
function onTouchStop() {
touchmove.value = false;
scrollToAnchorIndex.value = null;
}
/**
* 滚动到指定锚点
*/
function scrollToAnchor(index: number) {
if (scrollToAnchorIndex.value === index) {
return;
}
scrollToAnchorIndex.value = index;
const anchor = children.find(item => item.getExposed().props.index === indexList.value[index]);
if (anchor) {
emit('select', anchor.getExposed().props.index);
uni.pageScrollTo({
duration: 0,
scrollTop: anchor.getExposed().top.value + Number(props.scrollTop)
});
}
}
defineExpose({
updateData,
setRect,
onScroll,
children
});
</script>
<style lang="scss" scoped>
@import '../../libs/css/style.components.scss';
.u-index-bar {
position: relative;
}
.u-index-bar__sidebar {
position: fixed;
top: 50%;
right: 0;
@include vue-flex;
flex-direction: column;
text-align: center;
transform: translateY(-50%);
user-select: none;
z-index: 99;
}
.u-index-bar__index {
font-weight: 500;
padding: 8rpx 18rpx;
font-size: 22rpx;
line-height: 1;
}
.u-indexed-list-alert {
position: fixed;
width: 120rpx;
height: 120rpx;
right: 90rpx;
top: 50%;
margin-top: -60rpx;
border-radius: 24rpx;
font-size: 50rpx;
color: var(--u-white-color);
background-color: rgba(0, 0, 0, 0.65);
@include vue-flex;
justify-content: center;
align-items: center;
padding: 0;
z-index: 9999999;
}
.u-indexed-list-alert text {
line-height: 50rpx;
}
</style>