scroll-view

Attributes

refresher-default-style

Event

StartNestedScrollEvent

NestedPreScrollEvent

Expand All

# scroll-view

Component Type：UniScrollViewElement

可滚动视图容器

# # Attributes

name	type	default	description
scroll-x	boolean	false	允许横向滚动，不支持同时设置scroll-y属性为true，同时设置true时scroll-y生效
scroll-y	boolean	true	允许纵向滚动，不支持同时设置scroll-x属性为true，同时设置true时scroll-y生效
rebound	boolean	true	控制是否回弹效果
upper-threshold	number	50	距顶部/左边多远时（单位px），触发 scrolltoupper 事件
lower-threshold	number	50	距底部/右边多远时（单位px），触发 scrolltolower 事件
scroll-top	number	0	设置竖向滚动条位置
scroll-left	number	0	设置横向滚动条位置
scroll-into-view	string.IDString	-	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
scroll-with-animation	boolean	false	是否在设置滚动条位置时使用滚动动画，设置false没有滚动动画
refresher-enabled	boolean	false	开启下拉刷新，暂时不支持scroll-x = true横向刷新
refresher-threshold	number	45	设置下拉刷新阈值
refresher-max-drag-distance	number	-	设置下拉最大拖拽距离（单位px），默认是下拉刷新控件高度的2.5倍
refresher-default-style	string	black	设置下拉刷新默认样式，支持设置 black \| white \| none， none 表示不使用默认样式 refresher-default-style
refresher-background	string.ColorString	#FFF	设置下拉刷新区域背景颜色
refresher-triggered	boolean	false	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
show-scrollbar	boolean	true	控制是否出现滚动条
custom-nested-scroll	boolean	false	子元素是否开启嵌套滚动将滚动事件与父元素协商处理
nested-scroll-child	string.IDString		嵌套滚动子元素的id属性，不支持ref，scroll-view惯性滚动时会让对应id元素视图进行滚动，子元素滚动时会触发scroll-view的nestedprescroll事件，嵌套子元素需要设置custom-nested-scroll = true
@refresherpulling	(event: RefresherEvent) => void	-	下拉刷新控件被下拉
@refresherrefresh	(event: RefresherEvent) => void	-	下拉刷新被触发
@refresherrestore	(event: RefresherEvent) => void	-	下拉刷新被复位
@refresherabort	(event: RefresherEvent) => void	-	下拉刷新被中止
@scrolltoupper	(event: ScrollToUpperEvent) => void	-	滚动到顶部/左边，会触发 scrolltoupper 事件
@scrolltolower	(event: ScrollToLowerEvent) => void	-	滚动到底部/右边，会触发 scrolltolower 事件
@scroll	(event: ScrollEvent) => void	-	滚动时触发，event.detail = {scrollLeft, scrollTop, scrollHeight, scrollWidth, deltaX, deltaY}
@startnestedscroll	(event: StartNestedScrollEvent) => Boolean	-	子元素开始滚动时触发, return ture表示与子元素开启滚动协商默认return false! event = {node}
@nestedprescroll	(event: NestedPreScrollEvent) => void	-	子元素滚动时触发，可执行event.consumed(x,y)告知子元素deltaX、deltaY各消耗多少。子元素将执行差值后的deltaX、deltaY滚动距离。不执行consumed(x,y)则表示父元素不消耗deltaX、deltaY。event = {deltaX, deltaY}
@stopnestedscroll	(event: Event) => void	-	子元素滚动结束或意外终止时触发

# # refresher-default-style

name	description
black	深颜色雪花样式
white	浅白色雪花样式
none	不使用默认样式

# # refresher-default-style Compatibility

	Android version	Android uni-app	Android uni-app-x	iOS version	iOS uni-app	iOS uni-app-x
black	5.0	x	3.9+	-	-	-
white	5.0	x	3.9+	-	-	-
none	5.0	x	3.9+	-	-	-

# # Event

# # RefresherEvent

# # RefresherEvent Values

name	type	required	default	description
detail	RefresherEventDetail	YES	-	-
type	string	YES	-	事件类型
target	Element	YES	-	触发事件的组件
currentTarget	Element	YES	-	当前组件
timeStamp	number	YES	-	事件发生时的时间戳

# # RefresherEventDetail Values

name	type	optinal	default	description
dy	number	YES	-	-

# # RefresherEvent Methods

name	type	required	default	description
stopPropagation	() => void	YES	-	阻止当前事件的进一步传播
preventDefault	() => void	YES	-	阻止当前事件的默认行为

# # ScrollToUpperEvent

# # ScrollToUpperEvent Values

name	type	required	default	description
detail	ScrollToUpperEventDetail	YES	-	-
type	string	YES	-	事件类型
target	Element	YES	-	触发事件的组件
currentTarget	Element	YES	-	当前组件
timeStamp	number	YES	-	事件发生时的时间戳

# # ScrollToUpperEventDetail Values

name	type	optinal	default	description
direction	string	YES	-	滚动方向 top 或 left

# # ScrollToUpperEvent Methods

name	type	required	default	description
stopPropagation	() => void	YES	-	阻止当前事件的进一步传播
preventDefault	() => void	YES	-	阻止当前事件的默认行为

# # ScrollToLowerEvent

# # ScrollToLowerEvent Values

name	type	required	default	description
detail	ScrollToLowerEventDetail	YES	-	-
type	string	YES	-	事件类型
target	Element	YES	-	触发事件的组件
currentTarget	Element	YES	-	当前组件
timeStamp	number	YES	-	事件发生时的时间戳

# # ScrollToLowerEventDetail Values

name	type	optinal	default	description
direction	string	YES	-	滚动方向 bottom 或 right

# # ScrollToLowerEvent Methods

name	type	required	default	description
stopPropagation	() => void	YES	-	阻止当前事件的进一步传播
preventDefault	() => void	YES	-	阻止当前事件的默认行为

# # ScrollEvent

# # ScrollEvent Values

name	type	required	default	description
detail	ScrollEventDetail	YES	-	-
type	string	YES	-	事件类型
target	Element	YES	-	触发事件的组件
currentTarget	Element	YES	-	当前组件
timeStamp	number	YES	-	事件发生时的时间戳

# # ScrollEventDetail Values

name	type	optinal	default	description
scrollTop	number	YES	-	竖向滚动的距离
scrollLeft	number	YES	-	横向滚动的距离
scrollHeight	number	YES	-	滚动区域的高度
scrollWidth	number	YES	-	滚动区域的宽度
deltaY	number	YES	-	当次滚动事件竖向滚动量
deltaX	number	YES	-	当次滚动事件横向滚动量

# # ScrollEvent Methods

name	type	required	default	description
stopPropagation	() => void	YES	-	阻止当前事件的进一步传播
preventDefault	() => void	YES	-	阻止当前事件的默认行为

# # StartNestedScrollEvent

# # StartNestedScrollEvent Values

name	type	required	default	description
node	Element	YES	-	开始滚动子节点对象
type	string	YES	-	事件类型
target	Element	YES	-	触发事件的组件
currentTarget	Element	YES	-	当前组件
timeStamp	number	YES	-	事件发生时的时间戳

# # StartNestedScrollEvent Methods

name	type	required	default	description
stopPropagation	() => void	YES	-	阻止当前事件的进一步传播
preventDefault	() => void	YES	-	阻止当前事件的默认行为

# # NestedPreScrollEvent

# # NestedPreScrollEvent Values

name	type	required	default	description
deltaX	number	YES	-	x轴滚动距离
deltaY	number	YES	-	y轴滚动距离
type	string	YES	-	事件类型
target	Element	YES	-	触发事件的组件
currentTarget	Element	YES	-	当前组件
timeStamp	number	YES	-	事件发生时的时间戳

# # NestedPreScrollEvent Methods

name	type	required	default	description
consumed	(consumedX: number, consumedY: number) => void	YES	-	通知到子节点x,y轴滚动距离的消耗
stopPropagation	() => void	YES	-	阻止当前事件的进一步传播
preventDefault	() => void	YES	-	阻止当前事件的默认行为

# # Example

hello uni-app x

<template>
   <!-- #ifdef APP -->
   <scroll-view style="flex: 1">
   	<!-- #endif -->
   	<view>
   		<page-head title="scroll-view,区域滚动视图"></page-head>
   		<view class="uni-padding-wrap uni-common-mt">
   			<view class="uni-title uni-common-mt">
   				<text class="uni-title-text">Vertical Scroll</text>
   				<text class="uni-subtitle-text">纵向滚动</text>
   			</view>
   			<view>
   				<scroll-view :scroll-top="scrollTop" :scroll-y="true" class="scroll-Y" scroll-with-animation="true"
   					@scrolltoupper="upper" @scrolltolower="lower" @scroll="scroll">
   					<view id="demo1" class="scroll-view-item uni-bg-red"><text class="text">A</text></view>
   					<view id="demo2" class="scroll-view-item uni-bg-green"><text class="text">B</text></view>
   					<view id="demo3" class="scroll-view-item uni-bg-blue"><text class="text">C</text></view>
   				</scroll-view>
   			</view>
   			<view @tap="goTop" class="uni-center uni-common-mt">
   				<text class="uni-link">点击这里返回顶部</text>
   			</view>

   			<view class="uni-title uni-common-mt">
   				<text class="uni-title-text">Horizontal Scroll</text>
   				<text class="uni-subtitle-text">横向滚动</text>
   			</view>
   			<view>
   				<scroll-view class="scroll-view_H" :scroll-x="true" @scroll="scroll" :scroll-left="120">
   					<view id="demo1" class="scroll-view-item_H uni-bg-red"><text class="text">A</text></view>
   					<view id="demo2" class="scroll-view-item_H uni-bg-green"><text class="text">B</text></view>
   					<view id="demo3" class="scroll-view-item_H uni-bg-blue"><text class="text">C</text></view>
   				</scroll-view>
   			</view>

   			<navigator url="/pages/component/scroll-view/scroll-view-props" hover-class="none">
   			<button type="primary" class="button default-button">
   				非下拉刷新的属性示例
   			</button>
   			</navigator>
   			<view class="uni-common-pb"></view>
   			<navigator url="/pages/component/scroll-view/scroll-view-refresher-props" hover-class="none">
   			<button type="primary" class="button default-button">
   				下拉刷新的属性示例
   			</button>
   			</navigator>
   			<view class="uni-common-pb"></view>
   			<navigator url="/pages/component/scroll-view/scroll-view-refresher" hover-class="none">
   			<button type="primary" class="button default-button"> 默认下拉刷新示例 </button>
   			</navigator>
   			<view class="uni-common-pb"></view>
   			<navigator url="/pages/component/scroll-view/scroll-view-custom-refresher-props" hover-class="none">
   			<button type="primary" class="button default-button">
   				自定义下拉刷新示例
   			</button>
   			</navigator>
   			<view class="uni-common-pb"></view>
   		</view>
   	</view>
   	<!-- #ifdef APP -->
   </scroll-view>
   <!-- #endif -->
</template>
<script lang="uts">
   export default {
   	data() {
   		return {
   			scrollTop: 0,
   			oldScrollTop: 0,
   		}
   	},
   	methods: {
   		upper: function (e : ScrollToUpperEvent) {
   			console.log(e)
   		},
   		lower: function (e : ScrollToLowerEvent) {
   			console.log(e)
   		},
   		scroll: function (e : ScrollEvent) {
   			this.oldScrollTop = e.detail.scrollTop
   		},
   		goTop: function () {
   			// 解决view层不同步的问题
   			this.scrollTop = this.oldScrollTop
   			this.$nextTick(function () {
   				this.scrollTop = 0
   			})
   			uni.showToast({
   				icon: 'none',
   				title: '纵向滚动 scrollTop 值已被修改为 0',
   			})
   		}
   	},
   }
</script>

<style>
   .scroll-Y {
   	height: 300rpx;
   }

   .scroll-view_H {
   	width: 100%;
   	flex-direction: row;
   }

   .scroll-view-item {
   	height: 300rpx;
   	justify-content: center;
   	align-items: center;
   }

   .scroll-view-item_H {
   	width: 690rpx;
   	height: 300rpx;
   	justify-content: center;
   	align-items: center;
   }

   .text {
   	font-size: 36rpx;
   	color: #ffffff;
   }

   .button {
   	margin-top: 30rpx;
   }
</style>

# 自定义下拉刷新样式

设置refresher-default-style属性为 none 不使用默认样式
自定义下拉刷新元素必须要声明为 slot="refresher"，需要设置刷新元素宽高信息否则可能无法正常显示！
通过组件提供的refresherpulling、refresherrefresh、refresherrestore、refresherabort下拉刷新事件调整自定义下拉刷新元素！实现预期效果

注意： 目前自定义下拉刷新元素不支持放在scroll-view的首个子元素位置上。可能无法正常显示

<scroll-view refresher-default-style="none" :refresher-enabled="true" :refresher-triggered="refresherTriggered"
			 @refresherpulling="onRefresherpulling" @refresherrefresh="onRefresherrefresh" 
			 @refresherrestore="onRefresherrestore" style="flex:1" >
			 
		<view v-for="i in 20" class="content-item">
			<text class="text">item-{{i}}</text>
		</view>
		
		<!-- 自定义下拉刷新元素 -->
		<view slot="refresher" class="refresh-box">
			<text class="tip-text">{{text[state]}}</text>
		</view>
		
</scroll-view>

具体代码请参考：自定义下拉刷新样式示例

# nested-scroll嵌套滚动协商

嵌套滚动是原生才有的概念，web没有。

它是指父子2个滚动容器嵌套，在滚动时可以互相协商，控制父容器怎么滚、子容器怎么滚。

通过在子滚动容器设置custom-nested-scroll = true，开启与父组件实现嵌套滚动协商。仅list-view、scroll-view组件支持与父组件嵌套滚动协商。

下面的示例代码，在一个scroll-view中嵌套了一个list-view。在list-view上设置了custom-nested-scroll="true"。

<scroll-view style="height: 100%;" scroll-y="true" rebound ="false" nested-scroll-child="listview" @startnestedscroll="onStartNestedScroll" @nestedprescroll="onNestedPreScroll"
	@stopnestedscroll="onStopNestedScroll">
		...
		<view style="height: 100px;">停靠视图</view>
		<list-view id="listview"  class="child-scroll" scroll-y="true" custom-nested-scroll="true">
			...
		</list-view>
</scroll-view>

子组件准备滚动时会触发父组件的startnestedscroll事件。父组件响应startnestedscroll事件return ture则表示与子组件建立嵌套滚动协商。

onStartNestedScroll(event: StartNestedScrollEvent): Boolean {
	//开启与子组件建立嵌套滚动协商
	return true
}

当建立嵌套滚动协商后，子组件滚动时父组件会持续收到nestedprescroll事件，这个事件的含义是嵌套滚动即将发生。事件中会返回NestedPreScrollEvent子组件将要滚动的数据。
父组件执行NestedPreScrollEvent.consumed(x,y)函数，告知子组件本次nestedprescroll事件deltaX、deltaY各消耗多少，即父组件要消费掉多少滚动距离。子组件将执行差值后的deltaX、deltaY滚动距离，也就是剩余的滚动余量留给子组件。

onNestedPreScroll(event: NestedPreScrollEvent) {
	var deltaY = event.deltaY
	var deltaX = event.deltaX
	...
	if() {
		//告知子组件deltaX、deltaY各消耗多少
		event.consumed(x, y)
	}
}

父组件配置nested-scroll-child后，父组件惯性滚动时会让nested-scroll-child配置的子元素进行滚动。从而触发nestedprescroll协商处理滚动事件
滚动行为停止后会触发stopnestedscroll事件

注意：

仅Android平台支持嵌套滚动协商
嵌套滚动协商仅支持竖向滚动，横向滚动不支持
nested-scroll-child设置的元素必须配置custom-nested-scroll = true，否则配置无效。

具体代码请参考：nested-scroll嵌套滚动示例

# # Compatibility

	Android version	Android uni-app	Android uni-app-x	iOS version	iOS uni-app	iOS uni-app-x
scroll-view	5.0	√	3.9+	9.0	√	-
scroll-x	5.0	√	3.9+	-	-	-
scroll-y	5.0	√	3.9+	-	-	-
rebound	5.0	x	3.9+	-	-	-
upper-threshold	5.0	√	3.9+	-	-	-
lower-threshold	5.0	√	3.9+	-	-	-
scroll-top	5.0	√	3.9+	-	-	-
scroll-left	5.0	√	3.9+	-	-	-
scroll-into-view	5.0	√	3.9+	-	-	-
scroll-with-animation	5.0	√	3.9+	-	-	-
refresher-enabled	5.0	√	3.9+	-	-	-
refresher-threshold	5.0	√	3.9+	-	-	-
refresher-max-drag-distance	5.0	x	3.9+	-	-	-
refresher-default-style	5.0	√	3.9+	-	-	-
refresher-background	5.0	√	3.9+	-	-	-
refresher-triggered	5.0	√	3.9+	-	-	-
show-scrollbar	5.0	√	3.9+	-	-	-
custom-nested-scroll	5.0	x	3.9+	9.0	√	-
nested-scroll-child	5.0	x	3.97	9.0	x	-
@refresherpulling	5.0	√	3.9+	9.0	√	-
@refresherrefresh	5.0	√	3.9+	9.0	√	-
@refresherrestore	5.0	√	3.9+	9.0	√	-
@refresherabort	5.0	√	3.9+	9.0	√	-
@scrolltoupper	5.0	√	3.9+	9.0	√	-
@scrolltolower	5.0	√	3.9+	9.0	√	-
@scroll	5.0	√	3.9+	9.0	√	-
@startnestedscroll	5.0	x	3.9+	9.0	x	-
@nestedprescroll	5.0	x	3.9+	9.0	x	-
@stopnestedscroll	5.0	x	3.9+	9.0	x	-

# # See also

Related Bug

# Bug & Tips

scroll-view组件的overflow属性不支持配置visible

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