Question

如何进行分页。我已经尝试过很多次了，但是我做不到。我必须在没有Laravel的情况下分页。问题是我无法使一个周期显示页面数，每个页面应有10个帖子，总共有98个帖子。我对属性进行了计算，借助该属性，您可以找到将要包含的页面数。我做了一个有效的页面切换。但是由于某种原因，我无法显示页面数的周期对我来说不起作用，我无法理解是什么问题？

Screenshot

我的Vue js：从“ axios”导入axios；

export default {
  name: 'app',
  data () {

    return{
      counter: 1,
      zero: 0,
      posts: [],
      createTitle: '',
      createBody: '',
      visiblePostID: '',

    }
  },

  watch: {
      counter: function(newValue, oldValue) {
          this.getData()
      }
  },
  created(){
      this.getData()
   },

   computed: {
     evenPosts: function(posts){
       return Math.ceil(this.posts.length/10);

       }
     },

   methods: {
      getData() {
          axios.get(`http://jsonplaceholder.typicode.com/posts?_start=${this.counter}+${this.zero}&_limit=10`).then(response => {
              this.posts = response.data
          })
      },
      // even: function(posts) {
      //   return Math.ceil(this.posts.length/10)
      // },

        deleteData(index, id) {
          axios.delete('http://jsonplaceholder.typicode.com/posts/' + id)
                    .then(response => {
                      console.log('delete')
                        this.posts.splice(index, 1);
                      })
                    .catch(function(error) {
                        console.log(error)
                    })
                  },
        addPost() {
          axios.post('http://jsonplaceholder.typicode.com/posts/', {
            title: this.createTitle,
            body: this.createBody
            }).then((response) => {
              this.posts.unshift(response.data)
              })
            },
        changePost(id, title, body) {
          axios.put('http://jsonplaceholder.typicode.com/posts/' + id, {
            title: title,
            body: body
          })
        },
      },
  }

我的html：

<div id="app">
      <div class="smallfon">
        <div class="blocktwitter"><img src="src/assets/twitter.png"  class="twitter"/></div>
        <div class="addTextPost">Add a post</div>
        <input type="text" v-model="createTitle" class="created"/>
        <input type="text" v-model="createBody" class="created"/>
        <div><button  @click="addPost()" class="addPost">AddPost</button></div>
        <div class="post1">
          <div class="yourPosts">Your Posts</div>
          <ul>
            <li v-for="(post, index) of posts" class="post">
              <p><span class="boldText">Title:</span> {{ post.title }}</p>
              <p><span class="boldText">Content:</span> {{ post.body }}</p>
              <button  @click="deleteData(index, post.id)" class="buttonDelete">Delete</button>
              <button @click="visiblePostID = post.id" class="buttonChange">Change</button>
              <div v-if="visiblePostID === post.id" class="modalWindow">
              <div><input  v-model="post.title" class="changePost"><input  v-model="post.body" class="changePost"></div>
              <button type="button" @click="changePost(post.id, post.title, post.body)" class="apply">To apply</button>
            </div>
            </li>
          </ul>
              <button type="button" @click="counter -=1" class="prev">Предыдущая</button>
              <!-- <div class="counter">{{ counter }}</div> -->  <span v-for="n in evenPosts" :key="n.id">{{ n }} </span>
              <button type="button" @click="counter +=1" class="next">Следущая</button>

              <!-- <span v-for="n in evenPosts" :key="n.id">{{ n }} </span> -->

        </div>
      </div>
    </div>

Answer 1

如果将限制绑定到获取请求（ axios.get(...&_limit=10) ），则无法返回分页计数，因为您计算的evenPost属性将始终返回1，即{ {1}}

要解决分页问题，请删除参数查询以获取数据：

Math.ceil(10/10) == 1

然后将默认的getData() { axios.get('https://jsonplaceholder.typicode.com/posts').then(response => { this.posts = response.data }) }页面更改为counter，并添加一个计算属性以基于该页面返回10个帖子：

现在您可以迭代此属性：

data () {
  return {
    counter: 0,
    //...
  }
},
computed: {
   paginatedPosts() {
    const start = this.counter * 10;
    const end = start + 10;
    return this.posts.slice(start, end);
  }
}

Basic live example

如何进行分页？

1 个答案: