简体中文
简体中文
# flex-shrink
flex-shrink 属性设置弹性元素在主轴方向的收缩系数。当所有子元素在主轴方向的尺寸之和大于容器时才会发生收缩，会根据元素的收缩系数进行收缩保证不溢出弹性容器。
# uni-app x 兼容性
| Web | Android | iOS | HarmonyOS | HarmonyOS(Vapor) |
|---|---|---|---|---|
| 4.0 | 3.9 | 4.11 | 4.61 | 5.0 |
# 语法
flex-shrink: <number>;
# 值限制
- number
# 默认值
| 平台 | 默认值 |
|---|---|
| uvue | 0 |
注意：W3C 默认值为：1
# 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>flex-shrink</text>
<view class="demo-box">
<view class="flex-container">
<view class="common red" style="flex-shrink: 1">
<text>1</text>
</view>
<view class="common green" style="flex-shrink: 2">
<text>2</text>
</view>
<view class="common blue" style="flex-shrink: 3">
<text>3</text>
</view>
</view>
<view class="flex-container">
<view class="common red" style="flex-shrink: 1" flatten>
<text>1</text>
</view>
<view class="common green" style="flex-shrink: 2" flatten>
<text>2</text>
</view>
<view class="common blue" style="flex-shrink: 3" flatten>
<text>3</text>
</view>
</view>
</view>
</view>
<view class="uni-common-mt">
<text class="uni-title-text">setProperty 设置与 getPropertyValue 获取 flex-shrink </text>
</view>
<!-- 普通版本 -->
<view class="test-container">
<!-- view 组件测试 -->
<view class="test-item">
<text class="uni-subtitle-text">view 组件</text>
<text class="uni-info">设置值: {{flexShrink}}</text>
<text class="uni-info">获取值: {{flexShrinkActual}}</text>
<view class="test-box">
<view class="test-flex-container">
<view class="common-image red" style="flex-shrink: 1;"></view>
<view ref="viewRef" class="common-image green test-view" :style="{ flexShrink: flexShrink }">
<text class="test-label">{{flexShrink}}</text>
</view>
<view class="common-image blue" style="flex-shrink: 1;"></view>
</view>
</view>
</view>
<!-- text 组件测试 -->
<view class="test-item">
<text class="uni-subtitle-text">text 组件</text>
<text class="uni-info">设置值: {{flexShrink}}</text>
<text class="uni-info">获取值: {{flexShrinkActualText}}</text>
<view class="test-box">
<view class="test-flex-container">
<text class="common-text red" style="flex-shrink: 1;">红色</text>
<text ref="textRef" class="common-text green test-text" :style="{ flexShrink: flexShrink }">text</text>
<text class="common-text blue" style="flex-shrink: 1;">蓝色</text>
</view>
</view>
</view>
<!-- image 组件测试 -->
<view class="test-item">
<text class="uni-subtitle-text">image 组件</text>
<text class="uni-info">设置值: {{flexShrink}}</text>
<text class="uni-info">获取值: {{flexShrinkActualImage}}</text>
<view class="test-box">
<view class="test-flex-container">
<image class="common-image red" style="flex-shrink: 1;" src="/static/test-image/logo.png"></image>
<image ref="imageRef" class="common-image green test-image" :style="{ flexShrink: flexShrink }" src="/static/test-image/logo.png"></image>
<image class="common-image blue" style="flex-shrink: 1;" src="/static/test-image/logo.png"></image>
</view>
</view>
</view>
</view>
<!-- 拍平版本 -->
<view class="test-container">
<!-- view 组件拍平测试 -->
<view class="test-item">
<text class="uni-subtitle-text">view 组件拍平</text>
<text class="uni-info">设置值: {{flexShrink}}</text>
<text class="uni-info">获取值: {{flexShrinkActualFlat}}</text>
<view class="test-box">
<view class="test-flex-container">
<view class="common-image red" style="flex-shrink: 1;"></view>
<view ref="viewRefFlat" class="common-image green test-view-flatten" :style="{ flexShrink: flexShrink }" flatten>
<text class="test-label">{{flexShrink}}</text>
</view>
<view class="common-image blue" style="flex-shrink: 1;"></view>
</view>
</view>
</view>
<!-- text 组件拍平测试 -->
<view class="test-item">
<text class="uni-subtitle-text">text 组件拍平</text>
<text class="uni-info">设置值: {{flexShrink}}</text>
<text class="uni-info">获取值: {{flexShrinkActualTextFlat}}</text>
<view class="test-box">
<view class="test-flex-container">
<text class="common-text red" style="flex-shrink: 1;">红色</text>
<text ref="textRefFlat" class="common-text green test-text-flatten" :style="{ flexShrink: flexShrink }" flatten>text</text>
<text class="common-text blue" style="flex-shrink: 1;">蓝色</text>
</view>
</view>
</view>
<!-- image 组件拍平测试 -->
<view class="test-item">
<text class="uni-subtitle-text">image 组件拍平</text>
<text class="uni-info">设置值: {{flexShrink}}</text>
<text class="uni-info">获取值: {{flexShrinkActualImageFlat}}</text>
<view class="test-box">
<view class="test-flex-container">
<image class="common-image red" style="flex-shrink: 1;" src="/static/test-image/logo.png"></image>
<image ref="imageRefFlat" class="common-image green test-image-flatten" :style="{ flexShrink: flexShrink }" flatten src="/static/test-image/logo.png"></image>
<image class="common-image blue" style="flex-shrink: 1;" src="/static/test-image/logo.png"></image>
</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 :items="flexShrinkEnum" title="flex-shrink 枚举值" @change="radioChangeFlexShrink" :compact="true"></enum-data>
<input-data :defaultValue="flexShrink" title="flex-shrink 自定义值" type="text" @confirm="inputChangeFlexShrink"></input-data>
</view>
</view>
<!-- #ifdef APP -->
</scroll-view>
<!-- #endif -->
</template>
<script setup lang="uts">
import { ItemType } from '@/components/enum-data/enum-data-types'
const flexShrinkEnum: ItemType[] = [
{ value: 0, name: '' },
{ value: 1, name: '0' },
{ value: 2, name: '1' },
{ value: 3, name: '2' },
{ value: 4, name: '3' }
]
const flexShrink = ref('1')
const flexShrinkActual = ref('')
const flexShrinkActualFlat = ref('')
const flexShrinkActualText = ref('')
const flexShrinkActualImage = ref('')
const flexShrinkActualTextFlat = ref('')
const flexShrinkActualImageFlat = ref('')
const viewRef = ref(null as UniElement | null)
const viewRefFlat = ref(null as UniElement | null)
const textRef = ref(null as UniTextElement | null)
const imageRef = ref(null as UniImageElement | null)
const textRefFlat = ref(null as UniTextElement | null)
const imageRefFlat = ref(null as UniImageElement | null)
const getPropertyValues = () => {
flexShrinkActual.value = viewRef.value?.style.getPropertyValue('flex-shrink') ?? ''
flexShrinkActualFlat.value = viewRefFlat.value?.style.getPropertyValue('flex-shrink') ?? ''
flexShrinkActualText.value = textRef.value?.style.getPropertyValue('flex-shrink') ?? ''
flexShrinkActualTextFlat.value = textRefFlat.value?.style.getPropertyValue('flex-shrink') ?? ''
flexShrinkActualImage.value = imageRef.value?.style.getPropertyValue('flex-shrink') ?? ''
flexShrinkActualImageFlat.value = imageRefFlat.value?.style.getPropertyValue('flex-shrink') ?? ''
}
const changeFlexShrink = (value: string) => {
flexShrink.value = value
viewRef.value?.style.setProperty('flex-shrink', value)
viewRefFlat.value?.style.setProperty('flex-shrink', value)
textRef.value?.style.setProperty('flex-shrink', value)
textRefFlat.value?.style.setProperty('flex-shrink', value)
imageRef.value?.style.setProperty('flex-shrink', value)
imageRefFlat.value?.style.setProperty('flex-shrink', value)
// 使用 nextTick 确保样式已应用后再获取值
nextTick(() => {
getPropertyValues()
})
}
const radioChangeFlexShrink = (index: number) => {
const selectedItem = flexShrinkEnum.find((item): boolean => item.value === index)
if (selectedItem != null) {
changeFlexShrink(selectedItem.name)
}
}
const inputChangeFlexShrink = (value: string) => {
changeFlexShrink(value)
}
onReady(() => {
getPropertyValues()
})
defineExpose({
radioChangeFlexShrink
})
</script>
<style>
.demo-box {
flex-direction: row;
margin-top: 10px;
justify-content: space-around;
}
.flex-container {
flex: 1;
margin: 0 10px;
height: 100px;
background-color: gray;
flex-direction: row;
}
.common {
width: 125px;
height: 50px;
justify-content: center;
align-items: center;
}
.common-text {
width: 60px;
height: 30px;
background-color: green;
font-size: 12px;
color: white;
}
.common-image {
width: 60px;
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: 50px;
background-color: gray;
}
.test-flex-container {
width: 135px;
height: 100%;
flex-direction: row;
}
.red {
background-color: red;
}
.blue {
background-color: blue;
}
.green {
background-color: green;
}
.test-label {
font-size: 12px;
color: white;
}
</style>
