Question

我有以下任务列表应用。我正在尝试实现delete函数。我需要使用splice从array中删除该项目，但如何仅定位我点击其按钮的项目？

https://jsfiddle.net/clintongreen/txtrage5/1/

JS

new Vue({

    el: '#tasks',

    data: {
        message: 'Tasks',
        completed: null,
        newTaskName: '',
        tasklist: [
            { description: 'Read', completed: true },
            { description: 'Write', completed: true },
            { description: 'Edit', completed: false },
            { description: 'Publish', completed: false }
        ]
    },

    methods: {
        completeTask: function(task){
            // console.log(this.tasks.description);
            task.completed = true;
        },
        newTask: function(){
            this.tasklist.push({description: this.newTaskName, completed: false});
        },
        removeTask: function(task){
            this.tasklist.splice(this.task.index, 1);
        }
    }

})

HTML

<div class="container" id="tasks">

    <div class="panel panel-default">
      <div class="panel-heading">
        <h3 class="panel-title">
            {{ message }}
        </h3>
      </div>
      <ul class="list-group">
        <li class="list-group-item clearfix" v-for="task in tasklist" >
            {{ task.description }}
            <!-- <button class="btn btn-primary btn-sm pull-right" v-if="!task.completed" @click="completeTask(task)">Complete</button> -->
            <div class="btn-group btn-group-sm pull-right" role="group" v-if="!task.completed">
              <button type="button" class="btn btn-primary" @click="completeTask(task)">Complete</button>
              <button type="button" class="btn btn-info">Edit</button>
              <button type="button" class="btn btn-danger" @click="removeTask(task)">Delete</button>
            </div>
            <button class="btn btn-default btn-sm completed text-muted pull-right disabled" v-else>Completed</button>
        </li>
        <li class="list-group-item clearfix">
            <input v-model="newTaskName" @keyup.enter="newTask" type="text" class="pull-left">
            <button class="btn btn-success btn-sm pull-right" @click="newTask">Add Task</button>
        </li>
      </ul>
    </div>

</div>

Answer 1

使用v-for中任务的索引来决定splice()中的哪个项目：

v-for="(task, index) in tasklist"

您的按钮：

<button type="button" class="btn btn-danger" @click="removeTask(index)">Delete</button>

然后简单地说：

removeTask: function(index) {
    this.tasklist.splice(index, 1);
}

Answer 2

removeTask: function(task){
    this.tasklist.splice(this.tasklist.indexOf(task), 1);
}

Answer 3

对于Vue2，请使用delete。 See API.

removeTask: function(index){
    this.$delete(this.tasklist, index)
}

在Vue中从数组中删除项目

3 个答案: