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vue实现生日选择

2026-01-19 06:48:37VUE

Vue 实现生日选择功能

在 Vue 中实现生日选择功能，通常需要构建一个包含年、月、日三个下拉选择框的组件。以下是一个完整的实现方案：

数据准备与初始化

data() {
  return {
    years: [],
    months: Array.from({length: 12}, (v, i) => i + 1),
    days: [],
    selectedYear: '',
    selectedMonth: '',
    selectedDay: ''
  }
},
created() {
  this.generateYears()
}

生成年份范围

methods: {
  generateYears() {
    const currentYear = new Date().getFullYear()
    const startYear = currentYear - 100
    this.years = Array.from({length: currentYear - startYear + 1}, (v, i) => startYear + i)
  }
}

处理月份变化

watch: {
  selectedMonth(newVal) {
    this.updateDays(newVal, this.selectedYear)
  },
  selectedYear(newVal) {
    this.updateDays(this.selectedMonth, newVal)
  }
}

更新天数逻辑

methods: {
  updateDays(month, year) {
    if (!month || !year) return

    const daysInMonth = new Date(year, month, 0).getDate()
    this.days = Array.from({length: daysInMonth}, (v, i) => i + 1)

    if (this.selectedDay > daysInMonth) {
      this.selectedDay = ''
    }
  }
}

模板部分

<template>
  <div class="birthday-selector">
    <select v-model="selectedYear" @change="updateDays(selectedMonth, selectedYear)">
      <option value="">选择年份</option>
      <option v-for="year in years" :key="year" :value="year">{{ year }}</option>
    </select>

    <select v-model="selectedMonth" @change="updateDays(selectedMonth, selectedYear)">
      <option value="">选择月份</option>
      <option v-for="month in months" :key="month" :value="month">{{ month }}</option>
    </select>

    <select v-model="selectedDay">
      <option value="">选择日期</option>
      <option v-for="day in days" :key="day" :value="day">{{ day }}</option>
    </select>
  </div>
</template>

样式优化

<style scoped>
.birthday-selector select {
  padding: 8px;
  margin-right: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
}
</style>

完整组件使用

export default {
  name: 'BirthdaySelector',
  props: {
    value: {
      type: String,
      default: ''
    }
  },
  watch: {
    selectedYear() {
      this.emitDate()
    },
    selectedMonth() {
      this.emitDate()
    },
    selectedDay() {
      this.emitDate()
    }
  },
  methods: {
    emitDate() {
      if (this.selectedYear && this.selectedMonth && this.selectedDay) {
        const date = `${this.selectedYear}-${this.selectedMonth.toString().padStart(2, '0')}-${this.selectedDay.toString().padStart(2, '0')}`
        this.$emit('input', date)
      }
    }
  }
}