vue.js - Vuejs - 如何在点击时进行 v-for 循环

Question

我正在学习 Vue 并尝试自己完成一项任务。

我想了解如何在 @click 上运行 v-for 循环，以便在初始状态下仅出现“城市”模板，并且每次单击时，游览模板都会呈现相关游览。

let EventBus = new Vue();
Vue.component('cities', {

	name: 'Listings',
	props: ['city','tour'],
	
	template: `
	<div>
	<div class='city-list box'>
	<city v-for='city in cities' :id='city.id' :key='city.id' :city='city' :tour='tour' @click.native='select(city)'></city>
	</div>
	<div class='tour-list box'>
	<tours v-for='tour in filter(tours)' :id='tour.id' :key='tour.id' :tour='tour'></tours>
	</div>
	</div>
	`,

	data() {
		return {

			cities: [
			{id:1, name: 'Istanbul'},
			{id:2, name: 'Paris'},
			{id:3, name: 'Barça'},
			{id:4, name: 'Rome'},
			{id:5, name: 'Mars'}
			],

			tours: [
			{id:1, cid:1, name: 'Bosphorus'},
			{id:2, cid:2, name: 'Eiffel'},
			{id:3, cid:3, name: 'La Sagrada Familia'},
			{id:4, cid:4, name: 'Colosseum'},
			{id:5, cid:5, name: 'Mars Canyon'},
			{id:6, cid:1, name: 'Sultanahmet'},
			{id:7, cid:2, name: 'Champs-Élysées'},
			{id:8, cid:3, name: 'Casa Mila'},
			{id:9, cid:4, name: 'Trevi Fountain'},
			{id:10, cid:5, name: 'Mars Desert'},
			]
		};
	},

	methods: {
		select(city) {
			console.log('select');
			EventBus.$emit('filter', city);
		},

		filter(tours) {
			console.log('filter');
			EventBus.$on('select', ()=>{
			cid = this.city.id;
			return tours.filter(function(tour) {
				return tour.cid == cid;
			});
		});
		},
	},

	components: {

		'city': {
			name: 'City',
			props: ['city'],
			template: `
			<div :id="[city.name.toLowerCase()]" :class="[city.name.toLowerCase()]">
			<h1>{{ city.name }}</h1>
			</div>`
		},

		'tour': {
			name: 'Tour',
			props: ['city', 'tour'],
			template: `
			<div :class="['tour-' + tour.id]" :id="[city.name.toLowerCase() + '-tours']" :refs="city.id" :data-id="city.id">
			{{ tour.name }}
			</div>
			`,
		},
	},

});

new Vue({
	el: '#root'
});

	body {
		font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
	}
	.box {
		margin: 48px auto;
		max-width: 1024px;
		display: flex;
		justify-content: center;
		align-items: center;
	}
	.box h1 {
		font-size: 1.1rem;
		color: #41f;
	}
	.box > div {
		padding: 24px;
		margin: 12px;
		width: 20%;
		min-height: 100px;
		border-radius: 2px;
		font-size: 1.15rem;
		line-height: 1;
	}

	.box > div:nth-child(1)
	{background-color: #ffb3ba;}
	.box > div:nth-child(2)
	{background-color: #ffdfba;}
	.box > div:nth-child(3)
	{background-color: #ffffba;}
	.box > div:nth-child(4)
	{background-color: #baffc9;}
	.box > div:nth-child(5)
	{background-color: #bae1ff;}

<script src="https://unpkg.com/<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="285e5d4d681a061c061c" rel="noreferrer noopener nofollow">[email protected]</a>/dist/vue.js"></script>
	<div id="root">
		<cities></cities>
	</div>

我也对最先进的技术感兴趣，如果将两个模板(相关的)放在一起是一个很好的做法，并将此模型与数据库和路由器(城市/旅游列表)连接起来。或者你会如何处理这种情况(我想 jsfiddle 应该是不言自明的)。

作为旁注，我尝试将tour作为子组件添加到父组件 [jsfiddle]我通过 ID 过滤结果，我不确定这种方式对于组件和过滤结果在架构意义上是否是更好的方法。

https://jsfiddle.net/oy5fdc0r/29/

Answer 1

https://jsfiddle.net/oy5fdc0r/30/

使用数据属性而不是 Eventbus 来跟踪所选城市。然后，您可以使用计算属性根据所选城市显示正确的游览。

computed:{
      selectedTours(){
          return this.tours.filter(tour=>tour.cid == this.selectedCity.id)
      }
  },
    methods: {
        select(city) {
            this.selectedCity = city;
        },
    },