Design and development practice of UniApp to implement custom layout and style

Design and development practice of UniApp to implement custom layout and style

Introduction:
UniApp is a cross-platform application development framework based on Vue.js. Developers can use Vue in UniApp Grammar for application development. UniApp can not only adapt to the interface layout of different platforms, but also support customized layout and styles. This article will introduce how to implement the design and development of custom layout and style in UniApp, with code examples.

1. Implementation of custom layout
UniApp provides powerful page layout capabilities. Developers can implement custom layouts by writing Vue templates and styles. Here is a sample code:

<template>
  <view class="custom-layout">
    <view class="header">Header</view>
    <view class="content">Content</view>
    <view class="footer">Footer</view>
  </view>
</template>

<style>
.custom-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.header {
  background-color: #f8f8f8;
  height: 100px;
}

.content {
  flex: 1;
  background-color: #ffffff;
  padding: 20px;
}

.footer {
  background-color: #f8f8f8;
  height: 50px;
}
</style>

The above code shows a custom layout containing a header, content area, and bottom. By setting the height and style of the container, you can achieve adaptive layout of the page. At the same time, flexible style attributes can be set, such as background color, height, width, etc., to achieve personalized layout effects.

2. Style design and development
UniApp supports writing styles using CSS and preprocessors, so developers can design and develop their own styles according to their needs. The following is a sample code:

<template>
  <view class="custom-style">
    <text class="title">{{ message }}</text>
    <button class="primary-button" @click="handleClick">Click Me</button>
  </view>
</template>

<script>
export default {
  data() {
    return {
      message: 'Hello World'
    }
  },
  methods: {
    handleClick() {
      uni.showToast({
        title: 'Button Clicked',
        icon: 'none'
      })
    }
  }
}
</script>

<style>
.custom-style {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.title {
  font-size: 20px;
  color: #333333;
  margin-top: 50px;
}

.primary-button {
  background-color: #4caf50;
  color: #ffffff;
  font-size: 16px;
  padding: 10px 20px;
  border-radius: 5px;
  margin-top: 20px;
}
</style>

The above code shows a custom style, including a title and a click button. Various style effects can be achieved by setting different style properties, such as font size, color, background color, etc. In the event handler of clicking the button, we added a simple interactive effect to display a prompt through the uni.showToast method.

3. Expansion and customization of layout and style
In addition to using the default layout and style, UniApp also supports developers to customize layout and style extensions. By using Vue components and slots, you can organize and customize layout and styling with more flexibility. The following is a sample code:

<template>
  <view class="custom-layout">
    <slot name="header"></slot>
    <slot></slot>
    <slot name="footer"></slot>
  </view>
</template>

<style>
.custom-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
}
</style>

The above code is a custom layout component that extends the layout by using slots. Developers can add and customize their own layout content through slots when using this component. For example:

<template>
  <custom-layout>
    <template slot="header">
      <view class="header">Header</view>
    </template>
    <view class="content">Content</view>
    <template slot="footer">
      <view class="footer">Footer</view>
    </template>
  </custom-layout>
</template>

<style>
.header {
  background-color: #f8f8f8;
  height: 100px;
}

.content {
  flex: 1;
  background-color: #ffffff;
  padding: 20px;
}

.footer {
  background-color: #f8f8f8;
  height: 50px;
}
</style>

The above code shows how to use slots in custom layout components to achieve personalized layout effects.

Conclusion:
Through the use of UniApp, developers can easily implement the design and development of custom layouts and styles. UniApp provides powerful page layout capabilities and flexible style attributes, and supports custom layout components and slots, making layout and style expansion and customization easier and more efficient. I hope this article can provide some help and ideas to UniApp developers in implementing custom layout and styles.

Reference link:

• UniApp official documentation: https://uniapp.dcloud.io/
• Vue.js official documentation: https://vuejs. org/

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