简体中文
简体中文
# margin
margin 属性为给定元素设置所有四个（上下左右）方向的外边距属性。也就是 margin-top，margin-right，margin-bottom，和 margin-left 四个外边距属性设置的简写。
# uni-app x 兼容性
| Web | Android | iOS | HarmonyOS | HarmonyOS(Vapor) |
|---|---|---|---|---|
| 4.0 | 3.9 | 4.11 | 4.61 | 5.0 |
# 语法
margin: [ <length> | <percentage> | auto ]{1,4};
# 值限制
- length
- percentage
# margin 的属性值
| 名称 | 兼容性 | 描述 |
|---|---|---|
| auto | 让浏览器自己选择一个合适的外边距。有时，在一些特殊情况下，该值可以使元素居中。 |
# 默认值
0
注意
- app平台不支持外边距折叠（上下外边距折叠合并为单个边距，其大小为两个边距中的最大值），折叠规则参考CSS的外边距折叠
- HBuilderX3.98以下版本当 position 设置为 fixed 或 absolute 时， margin不支持 auto
# 示例
示例为hello uni-app x alpha分支，与最新HBuilderX Alpha版同步。与最新正式版同步的master分支示例另见
示例
<template>
<!-- #ifdef APP -->
<scroll-view style="flex: 1">
<!-- #endif -->
<view style="flex-grow: 1;">
<text class="uni-tips">说明：左边是正常版本，右边是拍平版本</text>
<view>
<text>margin: 25px</text>
<view class="demo-box">
<view class="demo-container">
<view class="common red"></view>
<view class="common" style="margin: 25px;"></view>
<view class="common blue"></view>
</view>
<view class="demo-container">
<view class="common red"></view>
<view class="common" style="margin: 25px;" flatten></view>
<view class="common blue"></view>
</view>
</view>
</view>
<view>
<text>margin: 10%</text>
<view class="demo-box">
<view class="demo-container">
<view class="common red"></view>
<view class="common" style="margin: 10%;"></view>
<view class="common blue"></view>
</view>
<view class="demo-container">
<view class="common red"></view>
<view class="common" style="margin: 10%;" flatten></view>
<view class="common blue"></view>
</view>
</view>
</view>
<view class="uni-common-mt">
<text class="uni-title-text">setProperty 设置与 getPropertyValue 获取 margin </text>
</view>
<view class="test-container">
<view class="test-item">
<text class="uni-subtitle-text">view 组件</text>
<text class="uni-info">设置值: {{margin}}</text>
<text class="uni-info">获取值: {{marginActual}}</text>
<view class="test-box">
<view class="common-view" style="background-color: red;"></view>
<view ref="viewRef" class="common-view test-view" :style="{ margin: margin }">
<text class="common-text">view</text>
</view>
<view class="common-view" style="background-color: blue;"></view>
</view>
</view>
<view class="test-item">
<text class="uni-subtitle-text">text 组件</text>
<text class="uni-info">设置值: {{margin}}</text>
<text class="uni-info">获取值: {{marginActualText}}</text>
<view class="test-box">
<text class="common-view common-text" style="background-color: red;">红色</text>
<text ref="textRef" class="common-view common-text test-text" :style="{ margin: margin }">text</text>
<text class="common-view common-text" style="background-color: blue;">蓝色</text>
</view>
</view>
<view class="test-item">
<text class="uni-subtitle-text">image 组件</text>
<text class="uni-info">设置值: {{margin}}</text>
<text class="uni-info">获取值: {{marginActualImage}}</text>
<view class="test-box">
<image class="common-image" style="background-color: red;" src="/static/test-image/logo.png"></image>
<image ref="imageRef" class="common-image test-image" :style="{ margin: margin }" src="/static/test-image/logo.png"></image>
<image class="common-image" style="background-color: blue;" src="/static/test-image/logo.png"></image>
</view>
</view>
</view>
<view class="test-container">
<view class="test-item">
<text class="uni-subtitle-text">view 组件拍平</text>
<text class="uni-info">设置值: {{margin}}</text>
<text class="uni-info">获取值: {{marginActualFlat}}</text>
<view class="test-box">
<view class="common-view" style="background-color: red;"></view>
<view ref="viewRefFlat" class="common-view test-view-flatten" :style="{ margin: margin }" flatten>
<text class="common-text">view</text>
</view>
<view class="common-view" style="background-color: blue;"></view>
</view>
</view>
<view class="test-item">
<text class="uni-subtitle-text">text 组件拍平</text>
<text class="uni-info">设置值: {{margin}}</text>
<text class="uni-info">获取值: {{marginActualTextFlat}}</text>
<view class="test-box">
<text class="common-view common-text" style="background-color: red;">红色</text>
<text ref="textRefFlat" class="common-view common-text test-text-flatten" :style="{ margin: margin }" flatten>text</text>
<text class="common-view common-text" style="background-color: blue;">蓝色</text>
</view>
</view>
<view class="test-item">
<text class="uni-subtitle-text">image 组件拍平</text>
<text class="uni-info">设置值: {{margin}}</text>
<text class="uni-info">获取值: {{marginActualImageFlat}}</text>
<view class="test-box">
<image class="common-image" style="background-color: red;" src="/static/test-image/logo.png"></image>
<image ref="imageRefFlat" class="common-image test-image-flatten" :style="{ margin: margin }" flatten src="/static/test-image/logo.png"></image>
<image class="common-image" style="background-color: blue;" src="/static/test-image/logo.png"></image>
</view>
</view>
</view>
<view class="uni-common-mt">
<text class="uni-title-text">scroll-view 组件 margin </text>
</view>
<view class="test-container">
<view class="test-item">
<text class="uni-subtitle-text">scroll-view 组件</text>
<text class="uni-info">设置值: {{margin}}</text>
<text class="uni-info">获取值: {{marginActualScrollView}}</text>
<view class="test-box" style="height: 180px;">
<view class="common-view" style="background-color: red;"></view>
<scroll-view ref="scrollViewRef" class="common-scroll-view" :style="{ margin: margin }">
<view class="scroll-view-content">
<text class="common-text">scroll-view1</text>
</view>
<view class="scroll-view-content">
<text class="common-text">scroll-view2</text>
</view>
<view class="scroll-view-content">
<text class="common-text">scroll-view3</text>
</view>
</scroll-view>
<view class="common-view" style="background-color: blue;"></view>
</view>
</view>
</view>
<view class="uni-common-mt uni-common-mb">
<text class="uni-tips">第一个枚举值，'' (空字符串) - 空值情况</text>
<enum-data :compact="true" :items="marginEnum" title="margin 枚举值" @change="radioChangeMargin"></enum-data>
<input-data :defaultValue="margin" title="margin 自定义值" type="text" @confirm="inputChangeMargin"></input-data>
</view>
</view>
<!-- #ifdef APP -->
</scroll-view>
<!-- #endif -->
</template>
<script setup lang="uts">
import { ItemType } from '@/components/enum-data/enum-data-types'
const margin = ref('25px')
const marginActual = ref('')
const marginActualText = ref('')
const marginActualImage = ref('')
const marginActualFlat = ref('')
const marginActualTextFlat = ref('')
const marginActualImageFlat = ref('')
const marginActualScrollView = ref('')
const viewRef = ref(null as UniElement | null)
const textRef = ref(null as UniTextElement | null)
const imageRef = ref(null as UniImageElement | null)
const viewRefFlat = ref(null as UniElement | null)
const textRefFlat = ref(null as UniTextElement | null)
const imageRefFlat = ref(null as UniImageElement | null)
const scrollViewRef = ref(null as UniElement | null)
const marginEnum: ItemType[] = [
{ value: 0, name: '' },
{ value: 1, name: '0' },
{ value: 2, name: '0px' },
{ value: 3, name: '20px' },
{ value: 4, name: '0%' },
{ value: 5, name: '10%' },
{ value: 6, name: 'auto' }
]
const getPropertyValues = () => {
marginActual.value = viewRef.value?.style.getPropertyValue('margin') ?? ''
marginActualFlat.value = viewRefFlat.value?.style.getPropertyValue('margin') ?? ''
marginActualText.value = textRef.value?.style.getPropertyValue('margin') ?? ''
marginActualTextFlat.value = textRefFlat.value?.style.getPropertyValue('margin') ?? ''
marginActualImage.value = imageRef.value?.style.getPropertyValue('margin') ?? ''
marginActualImageFlat.value = imageRefFlat.value?.style.getPropertyValue('margin') ?? ''
marginActualScrollView.value = scrollViewRef.value?.style.getPropertyValue('margin') ?? ''
}
const changeMargin = (value: string) => {
margin.value = value
viewRef.value?.style.setProperty('margin', value)
viewRefFlat.value?.style.setProperty('margin', value)
textRef.value?.style.setProperty('margin', value)
textRefFlat.value?.style.setProperty('margin', value)
imageRef.value?.style.setProperty('margin', value)
imageRefFlat.value?.style.setProperty('margin', value)
scrollViewRef.value?.style.setProperty('margin', value)
// 使用 nextTick 确保样式已应用后再获取值
nextTick(() => {
getPropertyValues()
})
}
const radioChangeMargin = (index: number) => {
const selectedItem = marginEnum.find((item): boolean => item.value === index)
if (selectedItem != null) {
changeMargin(selectedItem.name)
}
}
const inputChangeMargin = (value: string) => {
changeMargin(value)
}
onReady(() => {
getPropertyValues()
})
defineExpose({
radioChangeMargin
})
</script>
<style>
.demo-container {
flex: 1;
margin:0 10px;
height: 220px;
background-color: gray;
}
.demo-box {
flex-direction: row;
margin-top: 10px;
justify-content: space-around;
}
.common {
height: 50px;
background-color: green;
}
.red {
background-color: red;
}
.blue {
background-color: blue;
}
.common-view {
height: 30px;
background-color: green;
}
.common-text {
font-size: 12px;
color: white;
}
.common-image {
width: 30px;
height: 30px;
background-color: green;
}
.test-container {
flex-direction: row;
justify-content: space-between;
margin-top: 10px;
}
.test-item {
flex: 1;
margin: 0 5px;
}
.test-box {
width: 100%;
height: 140px;
background-color: gray;
}
.common-scroll-view {
height: 30px;
background-color: green;
}
.scroll-view-content {
width: 100%;
height: 30px;
align-items: center;
justify-content: center;
border: cyan solid 2px;
}
</style>
