274 行
8.3 KiB
Plaintext
274 行
8.3 KiB
Plaintext
<template>
|
|
<scroll-view ref="pageScrollView" class="page" :bounces="false" type="nested"
|
|
:refresher-triggered="refresherTriggered" refresher-enabled="true" @refresherrefresh="onRefresherrefresh">
|
|
<nested-scroll-header>
|
|
<swiper ref="header" indicator-dots="true" circular="true">
|
|
<swiper-item v-for="i in 3" :item-id="''+i">
|
|
<image src="/static/shuijiao.jpg" style="width:100% ;height: 240px;"></image>
|
|
<text style="position: absolute;">{{i}}</text>
|
|
</swiper-item>
|
|
</swiper>
|
|
</nested-scroll-header>
|
|
<nested-scroll-body style="height: 100%;">
|
|
<view style="flex: 1;">
|
|
<scroll-view ref="tabScrollView" class="swiper-tabs" direction="horizontal" :show-scrollbar="false">
|
|
<view class="flex-row" style="align-self: flex-start;">
|
|
<text ref="swipertab" class="swiper-tabs-item" :class="swiperIndex==index ? 'swiper-tabs-item-active' : ''"
|
|
v-for="(item, index) in swiperList" :key="index" @click="onTabClick(index)">
|
|
{{item.name}}
|
|
</text>
|
|
</view>
|
|
<view ref="indicatorNode" class="swiper-tabs-indicator"></view>
|
|
</scroll-view>
|
|
<swiper ref="swiper" class="swiper-view" :current="swiperIndex" @transition="onSwiperTransition"
|
|
@animationfinish="onSwiperAnimationfinish">
|
|
<swiper-item class="swiper-item" v-for="(item, index) in swiperList" :key="index">
|
|
<long-page ref="longPageRef" :id="item.id" :type="item.type" :preload="item.preload"></long-page>
|
|
</swiper-item>
|
|
</swiper>
|
|
</view>
|
|
</nested-scroll-body>
|
|
</scroll-view>
|
|
</template>
|
|
|
|
<script setup lang="uts">
|
|
/**
|
|
* @description: 支持顶部 Banner、横向标签栏和瀑布流内容联动切换的嵌套滚动页面。
|
|
* @logic: 页面顶部先展示 Banner，下面通过标签切换不同瀑布流数据源，在嵌套滚动容器中完成头部与内容区的联动滚动。
|
|
* @optimization: 标签内容按首次可见时才触发加载，并缓存标签尺寸用于复用指示器动画，减少瀑布流页面切换时的布局计算。
|
|
*/
|
|
import longPage from './long-waterflow-page.uvue';
|
|
|
|
type SwiperTabsItem = {
|
|
x : number,
|
|
w : number
|
|
}
|
|
|
|
type SwiperViewItem = {
|
|
type : string,
|
|
name : string,
|
|
id : string,
|
|
preload : boolean,
|
|
}
|
|
|
|
/**
|
|
* 根据权重在两个值之间执行线性插值.
|
|
* @constructor
|
|
* @param {number} value1 - 第一个值，该值应为下限.
|
|
* @param {number} value2 - 第二个值，该值应为上限.
|
|
* @param {number} amount - 应介于 0 和 1 之间，指示内插的权重.
|
|
* @returns {number} 内插值
|
|
*/
|
|
function lerpNumber(value1 : number, value2 : number, amount : number) : number {
|
|
return (value1 + (value2 - value1) * amount)
|
|
}
|
|
|
|
const swiperList = ref([
|
|
{
|
|
type: 'UpdatedDate',
|
|
name: '最新上架',
|
|
id: "list-id-1",
|
|
preload: true
|
|
} as SwiperViewItem,
|
|
{
|
|
type: 'FreeHot',
|
|
name: '免费热榜',
|
|
id: "list-id-2",
|
|
preload: false
|
|
} as SwiperViewItem,
|
|
{
|
|
type: 'PaymentHot',
|
|
name: '付费热榜',
|
|
id: "list-id-3",
|
|
preload: false
|
|
} as SwiperViewItem,
|
|
{
|
|
type: 'HotList',
|
|
name: '热门总榜',
|
|
id: "list-id-4",
|
|
preload: false
|
|
} as SwiperViewItem
|
|
] as SwiperViewItem[]);
|
|
const swiperIndex = ref(0);
|
|
const pageScrollView = ref<UniScrollViewElement | null>(null);
|
|
let headerHeight = 0;
|
|
let animationFinishIndex = 0;
|
|
const tabScrollView = ref<UniScrollViewElement | null>(null);
|
|
const indicatorNode = ref<UniElement | null>(null);
|
|
let swiperWidth = 0;
|
|
let swiperTabsRect: SwiperTabsItem[] = [];
|
|
let nestedScrollChildId = "";
|
|
const header = ref<UniSwiperElement | null>(null);
|
|
const swipertab = ref<UniElement[]>([]);
|
|
const swiper = ref<UniSwiperElement | null>(null);
|
|
const longPageRef = ref<ComponentPublicInstance[]>([]);
|
|
|
|
function cacheTabItemsSize() {
|
|
swiperTabsRect.length = 0
|
|
swipertab.value.forEach((node) => {
|
|
swiperTabsRect.push({
|
|
x: node.offsetLeft,
|
|
w: node.offsetWidth
|
|
} as SwiperTabsItem)
|
|
})
|
|
}
|
|
|
|
function initSwiperItemData(index : number) {
|
|
if (!swiperList.value[index].preload) {
|
|
swiperList.value[index].preload = true;
|
|
longPageRef.value[index].$callMethod('loadData', null)
|
|
}
|
|
//swiper页面切换需要重新赋值嵌套滚动子元素的id
|
|
nestedScrollChildId = swiperList.value[index].id
|
|
}
|
|
|
|
function updateTabIndicator(current_index : number, move_to_index : number, percentage : number) {
|
|
const current_size = swiperTabsRect[current_index]
|
|
const move_to_size = swiperTabsRect[move_to_index]
|
|
|
|
// 计算指示线 左边距 和 宽度 在移动过程中的线性值
|
|
const indicator_line_x = lerpNumber(current_size.x, move_to_size.x, percentage)
|
|
const indicator_line_w = lerpNumber(current_size.w, move_to_size.w, percentage)
|
|
|
|
// 更新指示线
|
|
// #ifdef APP
|
|
const x = indicator_line_x + indicator_line_w / 2
|
|
indicatorNode.value?.style?.setProperty('transform', `translateX(${x}px) scaleX(${indicator_line_w})`)
|
|
// #endif
|
|
// #ifdef WEB
|
|
// TODO chrome windows系统 transform scaleX渲染bug
|
|
const x = indicator_line_x
|
|
indicatorNode.value?.style?.setProperty('width', `${indicator_line_w}px`)
|
|
indicatorNode.value?.style?.setProperty('transform', `translateX(${x}px)`)
|
|
// #endif
|
|
|
|
// 滚动到水平中心位置
|
|
const scroll_x = x - swiperWidth / 2
|
|
if (tabScrollView.value !== null) {
|
|
tabScrollView.value!.scrollLeft = scroll_x
|
|
}
|
|
}
|
|
|
|
function setSwiperIndex(index : number, updateIndicator : boolean) {
|
|
if (swiperIndex.value === index) {
|
|
return
|
|
}
|
|
|
|
swiperIndex.value = index
|
|
|
|
initSwiperItemData(index)
|
|
|
|
if (updateIndicator) {
|
|
updateTabIndicator(index, index, 1)
|
|
}
|
|
}
|
|
|
|
function onTabClick(index : number) {
|
|
setSwiperIndex(index, false)
|
|
}
|
|
|
|
function onSwiperTransition(e : SwiperTransitionEvent) {
|
|
// 微信 skyline 每项完成触发 Animationfinish，偏移值重置
|
|
// 微信 webview 全部完成触发 Animationfinish，偏移值累加
|
|
// 在滑动到下一个项的过程中，再次反向滑动，偏移值递减
|
|
// uni-app-x 和微信 webview 行为一致
|
|
|
|
const offset_x = e.detail.dx
|
|
|
|
// 计算当前索引并重置差异
|
|
const current_offset_x = offset_x % swiperWidth
|
|
const current_offset_i = offset_x / swiperWidth
|
|
const current_index = animationFinishIndex + parseInt(current_offset_i + '')
|
|
|
|
// 计算目标索引及边界检查
|
|
let move_to_index = current_index
|
|
if (current_offset_x > 0 && move_to_index < swiperList.value.length - 1) {
|
|
move_to_index += 1
|
|
} else if (current_offset_x < 0 && move_to_index > 0) {
|
|
move_to_index -= 1
|
|
}
|
|
|
|
// 计算偏移百分比
|
|
const percentage = Math.abs(current_offset_x) / swiperWidth
|
|
|
|
// 通知更新指示线
|
|
if (current_index != move_to_index) {
|
|
updateTabIndicator(current_index, move_to_index, percentage)
|
|
}
|
|
|
|
// 首次可见时初始化数据
|
|
initSwiperItemData(move_to_index)
|
|
}
|
|
|
|
function onSwiperAnimationfinish(e : SwiperAnimationFinishEvent) {
|
|
setSwiperIndex(e.detail.current, true)
|
|
animationFinishIndex = e.detail.current
|
|
}
|
|
|
|
onReady(() => {
|
|
headerHeight = header.value!.offsetHeight
|
|
swiperWidth = swiper.value!.getBoundingClientRect().width
|
|
cacheTabItemsSize()
|
|
updateTabIndicator(swiperIndex.value, swiperIndex.value, 1)
|
|
});
|
|
|
|
const refresherTriggered = ref(false);
|
|
function onRefresherrefresh(e : UniRefresherEvent) {
|
|
refresherTriggered.value = true;
|
|
longPageRef.value[swiperIndex.value].$callMethod('refreshData', () => {
|
|
refresherTriggered.value = false;
|
|
})
|
|
}
|
|
</script>
|
|
|
|
<style>
|
|
.flex-row {
|
|
flex-direction: row;
|
|
}
|
|
|
|
.page {
|
|
flex: 1;
|
|
}
|
|
|
|
.search-bar {
|
|
padding: 10px;
|
|
}
|
|
|
|
.swiper-list {
|
|
height: 100%;
|
|
/* #ifdef WEB */
|
|
flex: 1;
|
|
/* #endif */
|
|
}
|
|
|
|
.swiper-tabs {
|
|
background-color: #ffffff;
|
|
flex-direction: column;
|
|
}
|
|
|
|
.swiper-tabs-item {
|
|
color: #555;
|
|
font-size: 16px;
|
|
padding: 12px 25px;
|
|
white-space: nowrap;
|
|
}
|
|
|
|
.swiper-tabs-item-active {
|
|
color: #007AFF;
|
|
}
|
|
|
|
.swiper-tabs-indicator {
|
|
width: 1px;
|
|
height: 2px;
|
|
background-color: #007AFF;
|
|
}
|
|
|
|
.swiper-view {
|
|
flex: 1;
|
|
}
|
|
|
|
.swiper-item {
|
|
flex: 1;
|
|
}
|
|
</style>
|