uni-app 组件之scroll-view

大众平微 發表於 2021-7-21 14:10:00

原网页地址：https://uniapp.dcloud.io/component/scroll-view
<h1>说明</h1>
scroll-view，可滚动视图区域。用于区域滚动。
需注意在webview渲染页面中，区域滚动性能不及页面滚动。
<h1>属性说明</h1>
<table border="0">
<tbody>
<tr style="background-color: rgba(204, 204, 204, 1)">
<td>属性名</td>
<td>类型</td>
<td>默认值</td>
<td>说明</td>
<td>平台差异说明</td>
</tr>
<tr>
<td>scroll-x</td>
<td>Boolean</td>
<td>false</td>
<td>允许横向滚动</td>
<td> </td>
</tr>
<tr>
<td>scroll-y</td>
<td>Boolean</td>
<td>false</td>
<td>允许纵向滚动</td>
<td> </td>
</tr>
<tr>
<td>upper-threshold</td>
<td>Number</td>
<td>50</td>
<td>距顶部/左边多远时（单位px）,触发scrolltopper事件</td>
<td> </td>
</tr>
<tr>
<td>lower-threshold</td>
<td>Number</td>
<td>50</td>
<td>距离底部/右边多远时（单位px）,触发scrolltolwer事件</td>
<td> </td>
</tr>
<tr>
<td>scroll-top</td>
<td>Number</td>
<td> </td>
<td>设置竖直滚动条位置</td>
<td> </td>
</tr>
<tr>
<td>scroll-top</td>
<td>Number</td>
<td> </td>
<td>设置横向滚动条位置</td>
<td> </td>
</tr>
<tr>
<td>scroll-into-view</td>
<td>String</td>
<td> </td>
<td>值应为某子元素id（id不能以数字开头）。设置哪个方向可滚动，则在哪个方向滚动到该元素</td>
<td> </td>
</tr>
<tr>
<td>scroll-with-animation</td>
<td>Boolean</td>
<td>false</td>
<td>在设置滚动条位置时使用动画过渡</td>
<td> </td>
</tr>
<tr>
<td>enable-back-to-top</td>
<td>Boolean</td>
<td>false</td>
<td>iOS点击顶部状态栏、安卓双击标题栏时，滚动条返回顶部，只支持竖向</td>
<td>app-nvue，微信小程序</td>
</tr>
<tr>
<td>show-scrollbar</td>
<td>Boolean</td>
<td>false</td>
<td>控制是否出现滚动条</td>
<td>App-nvue 2.1.5+</td>
</tr>
<tr>
<td>refresher-enabled</td>
<td>Boolean</td>
<td>false</td>
<td>开启自定义下拉刷新</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
<tr>
<td>refresher-threshold</td>
<td>Number</td>
<td>45</td>
<td>设置自定义下拉刷新阈值</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
<tr>
<td>refresher-default-style</td>
<td>String</td>
<td>"black"</td>
<td>设置自定义下拉刷新默认样式，支持设置 black，white，none，none 表示不使用默认样式</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
<tr>
<td>refresher-background</td>
<td>String</td>
<td>"#FFF"</td>
<td>设置自定义下拉刷新区域背景颜色</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
<tr>
<td>refresher-triggered</td>
<td>Boolean</td>
<td>false</td>
<td>设置当前下拉刷新状态，true 表示下拉刷新已经被触发，false 表示下拉刷新未被触发</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
<tr>
<td>enable-flex</td>
<td>Boolean</td>
<td>false</td>
<td>启用 flexbox 布局。开启后，当前节点声明了 display: flex 就会成为 flex container，并作用于其孩子节点。</td>
<td>微信小程序 2.7.3</td>
</tr>
<tr>
<td>scroll-anchoring</td>
<td>Boolean</td>
<td>false</td>
<td>开启 scroll anchoring 特性，即控制滚动位置不随内容变化而抖动，仅在 iOS 下生效，安卓下可参考 CSS overflow-anchor 属性。</td>
<td>微信小程序 2.8.2</td>
</tr>
<tr>
<td>@scrolltoupper</td>
<td>EventHandle</td>
<td> </td>
<td>滚动到顶部/左边，会触发 scrolltoupper 事件</td>
<td> </td>
</tr>
<tr>
<td>@scrolltolower</td>
<td>EventHandle</td>
<td> </td>
<td>滚动到底部/右边，会触发 scrolltolower 事件　　　　</td>
<td> </td>
</tr>
<tr>
<td>@scroll</td>
<td>EventHandle</td>
<td> </td>
<td>滚动时触发，event.detail = {scrollLeft, scrollTop, scrollHeight, scrollWidth, deltaX, deltaY}</td>
<td> </td>
</tr>
<tr>
<td>@refresherpulling</td>
<td>EventHandle</td>
<td> </td>
<td>自定义下拉刷新控件被下拉</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
<tr>
<td>@refresherrefresh</td>
<td>EventHandle</td>
<td> </td>
<td>自定义下拉刷新被触发</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
<tr>
<td>@refresherrestore</td>
<td>EventHandle</td>
<td> </td>
<td>自定义下拉刷新被复位</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
<tr>
<td>@refresherabort</td>
<td>EventHandle</td>
<td> </td>
<td>自定义下拉刷新被中止</td>
<td>app-vue 2.5.12+,微信小程序基础库2.10.1+</td>
</tr>
</tbody>
</table>
使用数值滚动时，需要给<scroll-view>一个固定高度，通过css设置heigth;使用横向滚动时，需要给<scroll-view>添加white-space:nowrap；样式。
<h1>示例 查看演示</h1>
以下示例代码来自hello uni-app项目，推荐使用HBuilderX。
<div class="cnblogs_code"><img src="http://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif"><img id="code_img_opened_66cf6f9e-1bac-4188-827a-171cbf518446" class="code_img_opened lazyload" style="display: none" data-src="http://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif">
<div id="cnblogs_code_open_66cf6f9e-1bac-4188-827a-171cbf518446" class="cnblogs_code_hide">
<pre> 1 
 2 <template>
 3 <view>
 4 <view class="uni-padding-wrap uni-common-mt">
 5 <view class="uni-title uni-common-mt">
 6 Vertical Scroll
 7 <text>\n纵向滚动</text>
 8 </view>
 9 <view>
10 <scroll-view :scroll-top="scrollTop" scroll-y="true" class="scroll-Y" @scrolltoupper="upper" @scrolltolower="lower"
11 @scroll="scroll">
12 <view id="demo1" class="scroll-view-item uni-bg-red">A</view>
13 <view id="demo2" class="scroll-view-item uni-bg-green">B</view>
14 <view id="demo3" class="scroll-view-item uni-bg-blue">C</view>
15 </scroll-view>
16 </view>
17 <view @tap="goTop" class="uni-link uni-center uni-common-mt">
18 点击这里返回顶部
19 </view>
20 <view class="uni-title uni-common-mt">
21 Horizontal Scroll
22 <text>\n横向滚动</text>
23 </view>
24 <view>
25 <scroll-view class="scroll-view_H" scroll-x="true" @scroll="scroll" scroll-left="120">
26 <view id="demo1" class="scroll-view-item_H uni-bg-red">A</view>
27 <view id="demo2" class="scroll-view-item_H uni-bg-green">B</view>
28 <view id="demo3" class="scroll-view-item_H uni-bg-blue">C</view>
29 </scroll-view>
30 </view>
31 </view>
32 </view>
33 </template></pre>
</div>
示例</div>
<div class="cnblogs_code"><img id="code_img_closed_9b9d68f2-b74f-498c-9720-2180bbe190f5" class="code_img_closed lazyload" data-src="http://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif"><img id="code_img_opened_9b9d68f2-b74f-498c-9720-2180bbe190f5" class="code_img_opened lazyload" style="display: none" data-src="http://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif">
<div id="cnblogs_code_open_9b9d68f2-b74f-498c-9720-2180bbe190f5" class="cnblogs_code_hide">
<pre> 1 export default {
 2 data() {
 3 return {
 4 scrollTop: 0,
 5 old: {
 6 scrollTop: 0
 7 }
 8 }
 9 },
10 methods: {
11 upper: function(e) {
12 console.log(e)
13 },
14 lower: function(e) {
15 console.log(e)
16 },
17 scroll: function(e) {
18 console.log(e)
19 this.old.scrollTop = e.detail.scrollTop
20 },
21 goTop: function(e) {
22 this.scrollTop = this.old.scrollTop
23 this.$nextTick(function() {
24 this.scrollTop = 0
25 });
26 uni.showToast({
27 icon:"none",
28 title:"纵向滚动 scrollTop 值已被修改为 0"
29 })
30 }
31 }</pre>
</div>
View Code</div>
<h1>自定义下拉刷新</h1>
注意自定义下拉刷新的性能不及pages.json中配置的原生下拉刷新。
<div class="cnblogs_code"><img id="code_img_closed_03eae496-ffe7-4780-9ce7-288b05e50e11" class="code_img_closed lazyload" data-src="http://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif"><img id="code_img_opened_03eae496-ffe7-4780-9ce7-288b05e50e11" class="code_img_opened lazyload" style="display: none" data-src="http://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif">
<div id="cnblogs_code_open_03eae496-ffe7-4780-9ce7-288b05e50e11" class="cnblogs_code_hide">
<pre>1 <template>
2 <view>
3 <scroll-view style="height: 300px;" scroll-y="true" refresher-enabled="true" :refresher-triggered="triggered"
4 :refresher-threshold="100" refresher-background="lightgreen" @refresherpulling="onPulling"
5 @refresherrefresh="onRefresh" @refresherrestore="onRestore" @refresherabort="onAbort"></scroll-view>
6 </view>
7 </template></pre>
</div>
View Code</div>
<div class="cnblogs_code"><img id="code_img_closed_d83770ac-43a0-457f-87e1-de463c8be898" class="code_img_closed lazyload" data-src="http://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif"><img id="code_img_opened_d83770ac-43a0-457f-87e1-de463c8be898" class="code_img_opened lazyload" style="display: none" data-src="http://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif">
<div id="cnblogs_code_open_d83770ac-43a0-457f-87e1-de463c8be898" class="cnblogs_code_hide">
<pre> 1 <script>
 2 export default {
 3 data() {
 4 return {
 5 triggered: false
 6 }
 7 },
 8 onLoad() {
 9 this._freshing = false;
10 setTimeout(() => {
11 this.triggered = true;
12 }, 1000)
13 },
14 methods: {
15 onPulling(e) {
16 console.log("onpulling", e);
17 },
18 onRefresh() {
19 if (this._freshing) return;
20 this._freshing = true;
21 setTimeout(() => {
22 this.triggered = false;
23 this._freshing = false;
24 }, 3000)
25 },
26 onRestore() {
27 this.triggered = 'restore'; // 需要重置
28 console.log("onRestore");
29 },
30 onAbort() {
31 console.log("onAbort");
32 }
33 }
34 }
35 </script></pre>
</div>
View Code</div>
<h2><img alt="" loading="lazy" style="display: block; margin-left: auto; margin-right: auto" data-src="https://img2020.cnblogs.com/blog/1602649/202107/1602649-20210721140549524-320743072.png"> Tips</h2>
<ul>
<li>APP-vue和小程序中，请勿在 scroll-view 中使用 map、video 等原生组件。小程序中 scroll-view 中也不要使用 canvas、textarea 原生组件。更新：微信基础库2.4.4起支持了原生组件在 scroll-view、swiper、movable-view 中的使用。app-nvue无此限制。</li>
<li>scroll-view 不适合放长列表，有性能问题。长列表滚动和下拉刷新，应该使用原生导航栏搭配页面级的滚动和下拉刷新实现。包括在app-nvue页面，长列表应该使用list而不是scroll-view。</li>
<li>scroll-into-view 的优先级高于 scroll-top。</li>
<li>scroll-view是区域滚动，不会触发页面滚动，无法触发pages.json配置的下拉刷新、页面触底onReachBottomDistance、titleNView的transparent透明渐变。</li>
<li>若要使用下拉刷新，建议使用页面的滚动，而不是 scroll-view 。插件市场有前端模拟的基于scroll-view的下拉刷新，但性能不佳。如必需使用前端下拉刷新，推荐使用基于wxs的下拉刷新，性能会比基于js监听方式更高。</li>
<li>如果遇到scroll-top、scroll-left、refresher-triggered属性设置不生效的问题参考：组件属性设置不生效解决办法</li>
<li>scroll-view的滚动条设置，可通过css的-webkit-scrollbar自定义，包括隐藏滚动条。（app-nvue无此css）。</li>
</ul>

</div>
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来源：https://www.cnblogs.com/luyj00436/p/15039228.html

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uni-app 组件之scroll-view