FLex布局详解---1

打开微信小程序开发工具，新建Hello word项目，删除掉无用的代码。

flex-direction

flex-direction属性表示布局的方向 有两个值： row | column 默认属性是row 行布局

html代码如下：

<view class="section">
<view class="section__title">flex-direction: row</view>
<view class="flex-wrp" style="flex-direction:row;">
<view class="flex-item bc_green">1</view>
<view class="flex-item bc_red">2</view>
<view class="flex-item bc_blue">3</view>
</view>
</view>

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效果图： 



flex-direction: column属性：

<view class="section">
<view class="section__title">flex-direction: column</view>
<view class="flex-wrp" style="flex-direction:column;height: 100%;">
<view class="flex-item bc_green">1</view>
<view class="flex-item bc_red">2</view>
<view class="flex-item bc_blue">3</view>
</view>
<
4000
/view>

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flex-direction: column效果图： 

justify-content

justify-content:弹性项目在主轴main-axis线上的对齐方式； 值：flex-start | flex-end | 

center | space-between | space-around （注：当横向排列时 主轴就是x轴；反之则是y轴。）

justify-content:flex-start

<view class="section">
<view class="section__title">justify-content:flex-start</view>
<view class="flex-wrp" style="flex-direction:row;justify-content:flex-start;">
<view class="flex-item bc_green">1</view>
<view class="flex-item bc_red">2</view>
<view class="flex-item bc_blue">3</view>
</view>
</view>

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效果图： 



flex-end | center | space-between | space-around 值同理 

align-items

align-Items表示在垂直方向上的布局情况定义在父级容器中； 

有 flex-start | flex-end | center |stretch 四个值。

align-items:flex-start;

<view class="section">
<view class="section__title">align-items:flex-start;</view>
<view class="flex-wrp" style="flex-direction:row;align-items:flex-start;">
<view class="flex-item bc_green">1</view>
<view class="flex-item bc_red">2</view>
<view class="flex-item bc_blue">3</view>
</view>
</view>

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效果图： 


 
align-items:center;

<view class="section">
<view class="section__title">align-items:center;</view>
<view class="flex-wrp" style="flex-direction:row;align-items:flex-start;">
<view class="flex-item bc_green">1</view>
<view class="flex-item bc_red">2</view>
<view class="flex-item bc_blue">3</view>
</view>
</view>

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效果图： 



align-items:flex-end;

<view class="section">
<view class="section__title">align-items:flex-end;</view>
<view class="flex-wrp" style="flex-direction:row;align-items:flex-end;">
<view class="flex-item bc_green">1</view>
<view class="flex-item bc_red">2</view>
<view class="flex-item bc_blue">3</view>
</view>
</view>

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