Design and development practice of UniApp to realize page layout and style optimization

UniApp is a cross-platform development framework based on Vue.js, which can quickly compile code into various application forms such as WeChat applets, Apps, and H5. In the development process of UniApp, page layout and style tuning are very important. This article will introduce how to design and develop the page layout and style optimization of UniApp, and practice it through code examples.

1. Page layout design and development

1. Clear the page structure: Before designing the page layout, you first need to clarify the overall structure of the page. You can use flow charts or hand-drawn sketches to clearly divide each module of the page and clarify the relationship between each module.
2. Use Flex layout: During the development process of UniApp, using Flex layout is a relatively common layout method. By setting the display of the container to flex, you can easily implement adaptive layout of multiple sub-elements. The following is a simple code example:

<template>
  <view class="container">
    <view class="item"></view>
    <view class="item"></view>
    <view class="item"></view>
  </view>
</template>

<style>
.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.item {
  width: 30%;
  height: 100px;
  background-color: #f0f0f0;
}
</style>

In the above code, .container is set to Flex layout, and flex-wrap is set to ##. #wrap and justify-content are space-between, which can realize adaptive layout of elements in the container. By setting the width of .item to 30%, you can display three elements per line.

Use Grid layout: UniApp also supports Grid layout, which can achieve a more flexible page layout. Through the
3. uni-grid component, a grid-like page layout can be achieved. The following is a simple code example:

<template>
  <view>
    <uni-grid :columns="3">
      <uni-grid-item>
        <view class="item"></view>
      </uni-grid-item>
      <uni-grid-item>
        <view class="item"></view>
      </uni-grid-item>
      <uni-grid-item>
        <view class="item"></view>
      </uni-grid-item>
    </uni-grid>
  </view>
</template>

<style>
.item {
  width: 100%;
  height: 100px;
  background-color: #f0f0f0;
}
</style>

In the above code, by setting the

columns attribute of uni-grid to 3 , which can display three elements per row. By setting the width of .item to 100%, adaptive layout of elements can be achieved.

2. Style optimization design and development
Reduce unnecessary style usage: During the development process of UniApp, the usage of styles will affect the loading speed of the page. Therefore, it is necessary to reduce the use of unnecessary styles to avoid placing additional pressure on page loading. Style optimization can be achieved by analyzing the actual needs of the page and using only necessary styles.
1. Reasonable use of style abbreviations: UniApp supports the use of style abbreviations to simplify code. For example, you can use
2. margin: 0 auto instead of margin-left: auto; margin-right: auto;, and padding: 10px instead of padding-top: 10px; padding-bottom: 10px; padding-left: 10px; padding-right: 10px; , etc. By rationally using style abbreviations, you can reduce the amount of code and improve operating efficiency.
Avoid using the !important flag: In the UniApp style tuning process, try to avoid using the
3. !important flag. !important will overwrite other styles, causing the weight of the style to be too high, which may affect the display effect of other styles. You can avoid using the !important flag by properly setting the hierarchical relationship of styles.
The above is the design and development practice of UniApp to implement page layout and style optimization. Through reasonable page layout design and development, as well as style optimization, the display effect and user experience of the page can be effectively improved. In the actual development process, various layout methods and style tuning techniques can be flexibly used according to project needs to achieve a more elegant and efficient UniApp application.

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