How to implement question and answer system and question answering in uniapp application

How Uniapp application implements Q&A system and question answering

With the development of mobile Internet, Q&A platform has become one of the important ways for people to obtain knowledge and solve problems. In Uniapp applications, implementing question and answer systems and question answering is a very common requirement. This article will introduce how to use Uniapp to implement a simple question and answer system and question answering function, and provide some specific code examples.

1. Basic structure of the question and answer system

The question and answer system mainly contains three core components: question list, question details and answer list. The question list displays the currently published questions, and the user can select a question to view. Question details display the detailed information of the question, including the question content and the questioner's information. The answer list displays the answers to the current question, and users can participate in answering or add new answers.

2. Implement the problem list

In Uniapp, you can use the data binding and loop instructions of Vue.js to implement the problem list. First, you need to define a question array questions, where each question object contains information such as the question's id, title, and content. Use the v-for directive in the page to loop through the questions array and render each question object as a question list item.

<template>
  <view>
    <view v-for="(question, index) in questions" :key="index">
      <text>{{ question.title }}</text>
    </view>
  </view>
</template>

<script>
export default {
  data() {
    return {
      questions: [
        { id: 1, title: '问题一' },
        { id: 2, title: '问题二' },
        { id: 3, title: '问题三' }
      ]
    }
  }
}
</script>

3. Implementation problem details

Click on a question in the question list to jump to the question details page. The question details page needs to display the detailed information of the question and provide access to answers. In Uniapp, you can use page parameters to get the id of the question and find the corresponding question object based on the id.

<template>
  <view>
    <text>{{ currentQuestion.title }}</text>
    <text>{{ currentQuestion.content }}</text>
    <view v-for="(answer, index) in currentQuestion.answers" :key="index">
      <text>{{ answer.content }}</text>
    </view>
    <button @click="goToAnswer">回答问题</button>
  </view>
</template>

<script>
export default {
  data() {
    return {
      currentQuestion: {}
    }
  },
  onLoad(options) {
    const questionId = options.id
    // 根据id查找问题对象
    this.currentQuestion = this.questions.find(question => question.id === questionId)
  },
  methods: {
    goToAnswer() {
      // 跳转到回答页面
      uni.navigateTo({
        url: '/pages/answer?id=' + this.currentQuestion.id
      })
    }
  }
}
</script>

4. Implement the answer function

The function of answering questions can provide an input box and submit button at the bottom of the question details page. Users can enter their own answers and submit them. In Uniapp, you can use two-way binding to save the answer entered by the user into an answer object, and then add this object to the answer list of the current question.

<template>
  <view>
    <input v-model="answer.content"></input>
    <button @click="submitAnswer">提交</button>
  </view>
</template>

<script>
export default {
  data() {
    return {
      answer: { content: '' }
    }
  },
  methods: {
    submitAnswer() {
      // 将answer添加到当前问题的回答列表中
      this.currentQuestion.answers.push(this.answer)
      // 提交成功后清空输入框
      this.answer.content = ''
    }
  }
}
</script>

The above is an example of a simple question and answer system and question answering function implemented in Uniapp. Through the above code and methods, you can quickly implement a basic question and answer system and provide question answering functions. Of course, more functions and optimizations may be needed in actual projects, which need to be expanded and improved according to specific needs.

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