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元素对齐往往是新学者的一大困惑点，在此总结常用的各种元素和文字对齐方式以供参考：

初始显示

.wxml

<view style="width: 100%;height: 500rpx; background-color: lightgray;"><view style="width: 200rpx;height:100rpx;background-color: aqua;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow">元素2</view>
</view>

初始定义元素，默认显示在左上角。

元素居中

水平居中关键代码：justify-content: center;

竖直居中关键代码：align-items: center;

.wxml

<view style="width: 100%;height: 500rpx; background-color: lightgray; display: flex; align-items: center; justify-content: center;"><view style="width: 200rpx;height:100rpx;background-color: aqua;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow">元素2</view>
</view>

元素水平两端对齐

关键代码：justify-content: space-between;

<view style="width: 100%;height: 500rpx; background-color: lightgray; display: flex; align-items: center; justify-content: space-between;"><view style="width: 200rpx;height:100rpx;background-color: aqua;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow">元素2</view>
</view>

 

 元素竖直两端对齐

关键代码：flex-direction: column; justify-content: space-between;

<view style="width: 100%;height: 500rpx; background-color: lightgray; display: flex; flex-direction: column; justify-content: space-between;align-items: center;"><view style="width: 200rpx;height:100rpx;background-color: aqua;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow">元素2</view>
</view>

元素左对齐

关键代码：justify-content: flex-start;

<view style="width: 100%;height: 500rpx; background-color: lightgray; display: flex; justify-content: flex-start;align-items: center;"><view style="width: 200rpx;height:100rpx;background-color: aqua;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow">元素2</view>
</view>

 

元素右对齐

关键代码：justify-content:flex-end;

<view style="width: 100%;height: 500rpx; background-color: lightgray; display: flex; justify-content:flex-end;align-items: center;"><view style="width: 200rpx;height:100rpx;background-color: aqua;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow">元素2</view>
</view>

 

元素上对齐

关键代码：flex-direction: column; justify-content:flex-start;

<view style="width: 100%;height: 500rpx; background-color: lightgray; display: flex;flex-direction: column; justify-content:flex-start;align-items: center;"><view style="width: 200rpx;height:100rpx;background-color: aqua;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow">元素2</view>
</view>

 

元素下对齐

关键代码：flex-direction: column; justify-content:flex-end;

<view style="width: 100%;height: 500rpx; background-color: lightgray; display: flex;flex-direction: column; justify-content:flex-end;align-items: center;"><view style="width: 200rpx;height:100rpx;background-color: aqua;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow">元素2</view>
</view>

文字居中对齐

文字其他对齐方式可以参考元素对齐

关键代码：justify-content:center;align-items: center;

<view style="width: 100%;height: 500rpx; background-color: lightgray; display: flex; justify-content:center;align-items: center; "><view style="width: 200rpx;height:100rpx;background-color: aqua; display: flex; align-items: center; justify-content: center;">元素1</view><view style="width: 200rpx;height:100rpx; background-color:yellow; display: flex; align-items: center; justify-content: center;">元素2</view>
</view>

可以在wxml的style参数中修改元素显示样式，也可在wxss文件定义样式。 

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