下面是我给出的“vue实现简单的日历效果”的完整攻略。
步骤一:安装所需依赖包
可以通过以下命令来完成vue和moment的安装:
npm i vue moment
步骤二:编写组件代码
我们先来编写日历组件的代码。可以在组件中定义一个当前日期和日历展示的月份(以及年份)的变量,然后通过计算属性,来根据这些变量计算出一个月的日期数组列表:
<template>
<div>
<h2>{{ monthYear }}</h2>
<table>
<thead>
<tr>
<th>周日</th>
<th>周一</th>
<th>周二</th>
<th>周三</th>
<th>周四</th>
<th>周五</th>
<th>周六</th>
</tr>
</thead>
<tbody>
<tr v-for="week in weeks" :key="week[0].toString()">
<td v-for="day in week" :key="day.toString()" :class="{'is-different-month': day.month() !== month}">
{{ day.date() }}
</td>
</tr>
</tbody>
</table>
</div>
</template>
<script>
import moment from 'moment';
export default {
name: 'Calendar',
data() {
return {
/* 当前日期 */
today: moment(),
/* 日历显示的月份 */
month: moment().month(),
/* 日历显示的年份 */
year: moment().year(),
};
},
computed: {
monthYear() {
return moment({
year: this.year,
month: this.month,
}).format('YYYY年MM月');
},
weeks() {
const firstDayOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
});
const startOfWeek = firstDayOfMonth.startOf('week');
const endOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
}).endOf('month');
let currentDay = startOfWeek;
const result = [];
let currentWeek;
while (currentDay.isBefore(endOfMonth)) {
if (currentDay.day() === 0) {
currentWeek = [];
result.push(currentWeek);
}
currentWeek.push(currentDay);
currentDay = currentDay.clone();
currentDay.add(1, 'd');
}
return result;
},
},
};
</script>
现在我们已经完成了日历组件的主体代码。其中包含了计算属性,用于生成一个月的日期数组列表。
步骤三:渲染组件
我们接下来来渲染日历组件。可以在Vue的实例中,将该组件放到template模板中。
<template>
<div>
<Calendar />
</div>
</template>
<script>
import Calendar from './Calendar.vue';
export default {
components: {
Calendar,
},
};
</script>
在这里,我们只需要将日历组件放到template中即可。
示例一:设置最小日期
可以在日历组件中,设置一个属性minDate来限制最早可选日期。注意,这里我们采用了一个watcher监听minDate的变化,并自动重新计算日历数据,以使得日期符合这个限制。
<template>
<div>
<h2>{{ monthYear }}</h2>
<table>
<thead>
<tr>
<th>周日</th>
<th>周一</th>
<th>周二</th>
<th>周三</th>
<th>周四</th>
<th>周五</th>
<th>周六</th>
</tr>
</thead>
<tbody>
<tr v-for="week in weeks" :key="week[0].toString()">
<td v-for="day in week" :key="day.toString()" :class="{'is-different-month': day.month() !== month, 'is-disabled': day.isBefore(minDate)}" :disabled="day.isBefore(minDate)">
{{ day.date() }}
</td>
</tr>
</tbody>
</table>
</div>
</template>
<script>
import moment from 'moment';
export default {
name: 'Calendar',
props: {
minDate: {
type: String,
default: null,
},
},
data() {
return {
/* 当前日期 */
today: moment(),
/* 日历显示的月份 */
month: moment().month(),
/* 日历显示的年份 */
year: moment().year(),
};
},
computed: {
monthYear() {
return moment({
year: this.year,
month: this.month,
}).format('YYYY年MM月');
},
weeks() {
const firstDayOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
});
const startOfWeek = firstDayOfMonth.startOf('week');
const endOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
}).endOf('month');
let currentDay = startOfWeek;
const result = [];
let currentWeek;
while (currentDay.isBefore(endOfMonth)) {
if (currentDay.day() === 0) {
currentWeek = [];
result.push(currentWeek);
}
currentWeek.push(currentDay);
currentDay = currentDay.clone();
currentDay.add(1, 'd');
}
return result;
},
},
watch: {
minDate() {
this.updateMonthYear();
},
},
methods: {
updateMonthYear() {
const firstDayOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
});
const startOfWeek = firstDayOfMonth.startOf('week');
const endOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
}).endOf('month');
let currentDay = startOfWeek;
const result = [];
let currentWeek;
while (currentDay.isBefore(endOfMonth)) {
if (currentDay.day() === 0) {
currentWeek = [];
result.push(currentWeek);
}
currentWeek.push(currentDay);
currentDay = currentDay.clone();
currentDay.add(1, 'd');
}
this.monthYear = moment({
year: this.year,
month: this.month,
}).format('YYYY年MM月');
this.weeks = result;
},
},
};
</script>
上面是增加了一个最小日期限制的代码。我们控制了一个class,样式为is-disabled。
示例二:设置最大日期
类似的,我们也可以设置一个最大日期,用于控制最晚可选日期。
<template>
<div>
<h2>{{ monthYear }}</h2>
<table>
<thead>
<tr>
<th>周日</th>
<th>周一</th>
<th>周二</th>
<th>周三</th>
<th>周四</th>
<th>周五</th>
<th>周六</th>
</tr>
</thead>
<tbody>
<tr v-for="week in weeks" :key="week[0].toString()">
<td v-for="day in week" :key="day.toString()" :class="{'is-different-month': day.month() !== month, 'is-disabled': day.isBefore(minDate) || day.isAfter(maxDate)}" :disabled="day.isBefore(minDate) || day.isAfter(maxDate)">
{{ day.date() }}
</td>
</tr>
</tbody>
</table>
</div>
</template>
<script>
import moment from 'moment';
export default {
name: 'Calendar',
props: {
minDate: {
type: String,
default: null,
},
maxDate: {
type: String,
default: null,
},
},
data() {
return {
/* 当前日期 */
today: moment(),
/* 日历显示的月份 */
month: moment().month(),
/* 日历显示的年份 */
year: moment().year(),
};
},
computed: {
monthYear() {
return moment({
year: this.year,
month: this.month,
}).format('YYYY年MM月');
},
weeks() {
const firstDayOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
});
const startOfWeek = firstDayOfMonth.startOf('week');
const endOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
}).endOf('month');
let currentDay = startOfWeek;
const result = [];
let currentWeek;
while (currentDay.isBefore(endOfMonth)) {
if (currentDay.day() === 0) {
currentWeek = [];
result.push(currentWeek);
}
currentWeek.push(currentDay);
currentDay = currentDay.clone();
currentDay.add(1, 'd');
}
return result;
},
},
watch: {
minDate() {
this.updateMonthYear();
},
maxDate() {
this.updateMonthYear();
},
},
methods: {
updateMonthYear() {
const firstDayOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
});
const startOfWeek = firstDayOfMonth.startOf('week');
const endOfMonth = moment({
year: this.year,
month: this.month,
day: 1,
}).endOf('month');
let currentDay = startOfWeek;
const result = [];
let currentWeek;
while (currentDay.isBefore(endOfMonth)) {
if (currentDay.day() === 0) {
currentWeek = [];
result.push(currentWeek);
}
currentWeek.push(currentDay);
currentDay = currentDay.clone();
currentDay.add(1, 'd');
}
this.monthYear = moment({
year: this.year,
month: this.month,
}).format('YYYY年MM月');
this.weeks = result;
},
},
};
</script>
在这个示例中,我们添加一个maxDate属性来表示最大可选日期,同时更新了相关的代码。
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