How to use multi-language switching technology to achieve multi-language support in uniapp

How to use multi-language switching technology to achieve multi-language support in uniapp

Introduction:
In mobile applications, in order to meet the language needs of different users, implement Multi-language support is a very common requirement. By using the multi-language switching technology provided by uniapp, we can easily implement multi-language support for the application. This article will introduce how to use multi-language switching technology to achieve multi-language support in uniapp, and provide specific code examples.

1. Preparation work:
Before starting, we need to ensure that the uniapp development environment has been installed and a uniapp project has been created. In addition, you also need to prepare text resource files for the multiple languages ​​that the application needs to support, as well as the corresponding language identifiers. Common language identifiers include zh-CN (Simplified Chinese), en-US (English), ja-JP (Japanese), etc.

2. Create multi-language resource files:
In the root directory of the uniapp project, create a folder named lang, and create multiple json files corresponding to different languages ​​in it. For example, we can create a zh-CN.json file with the following content:

{
  "hello": "你好",
  "welcome": "欢迎使用uniapp"
}

Similarly, we can create corresponding json files for English and Japanese with similar content.

3. Write multi-language switching code:

1. In the root directory of the uniapp project, create a file named lang.js. This file is used to encapsulate methods related to multi-language switching.

// lang.js

export default {
  // 根据语言标识获取对应的json文件
  getLanguageResource(language) {
    let resource = null;
    try {
      resource = require(`@/lang/${language}.json`);
    } catch (e) {
      resource = require('@/lang/zh-CN.json');
    }
    return resource;
  },
  
  // 根据语言标识获取对应的文本
  getText(language, key) {
    let resource = this.getLanguageResource(language);
    return resource[key] || '';
  }
}

2. In the root directory of the uniapp project, create a Vue component named langSwitch.vue. This component is used to switch the language of the application.

<template>
  <view>
    <view class="lang-switch">
      <text class="lang-item" v-for="item in languages" :key="item.value" @click="onLangClick(item.value)">
        {{ item.label }}
      </text>
    </view>
  </view>
</template>

<script>
import lang from '@/lang.js';

export default {
  data() {
    return {
      languages: [
        { label: '简体中文', value: 'zh-CN' },
        { label: 'English', value: 'en-US' },
        { label: '日本語', value: 'ja-JP' }
      ]
    };
  },
  methods: {
    onLangClick(language) {
      this.$emit('langChange', language);
    }
  }
}
</script>

<style>
.lang-switch {
  display: flex;
}

.lang-item {
  margin-right: 10px;
  cursor: pointer;
}
</style>

4. Use the multi-language switching function in the application:

1. In the page that needs to support multi-language switching, introduce the langSwitch.vue component and place it in the corresponding position Add components.

<template>
  <view>
    <lang-switch @langChange="onLangChange"></lang-switch>
    <view>{{ helloText }}</view>
    <view>{{ welcomeText }}</view>
  </view>
</template>

<script>
import lang from '@/lang.js';

export default {
  data() {
    return {
      helloText: '',
      welcomeText: ''
    };
  },
  methods: {
    onLangChange(language) {
      this.helloText = lang.getText(language, 'hello');
      this.welcomeText = lang.getText(language, 'welcome');
    }
  },
  mounted() {
    // 默认加载简体中文文本
    this.onLangChange('zh-CN');
  }
}
</script>

2. Complete the multi-language switching function by obtaining the texts corresponding to different language identifiers in the onLangChange method. By binding the onLangChange method to the langChange event of the lang-switch component, the callback when switching languages ​​is implemented.

Summary:
Through the above steps, we have learned how to use multi-language switching technology in uniapp to achieve multi-language support for applications. By creating multiple json files corresponding to different languages ​​and writing the corresponding switching code in uniapp, we finally achieved the function of applying multi-language switching. I hope this article will help you implement multi-language support in uniapp.

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