| <template> | 
|     <u-picker | 
|         ref="picker" | 
|         :show="show" | 
|         :closeOnClickOverlay="closeOnClickOverlay" | 
|         :columns="columns" | 
|         :title="title" | 
|         :itemHeight="itemHeight" | 
|         :showToolbar="showToolbar" | 
|         :visibleItemCount="visibleItemCount" | 
|         :defaultIndex="innerDefaultIndex" | 
|         :cancelText="cancelText" | 
|         :confirmText="confirmText" | 
|         :cancelColor="cancelColor" | 
|         :confirmColor="confirmColor" | 
|         :immediateChange="immediateChange" | 
|         @close="close" | 
|         @cancel="cancel" | 
|         @confirm="confirm" | 
|         @change="change" | 
|     > | 
|     </u-picker> | 
| </template> | 
|   | 
| <script> | 
|     function times(n, iteratee) { | 
|         let index = -1 | 
|         const result = Array(n < 0 ? 0 : n) | 
|         while (++index < n) { | 
|             result[index] = iteratee(index) | 
|         } | 
|         return result | 
|     } | 
|     import props from './props.js'; | 
|     import dayjs from '../../libs/util/dayjs.js'; | 
|     /** | 
|      * DatetimePicker 时间日期选择器 | 
|      * @description 此选择器用于时间日期 | 
|      * @tutorial https://www.uviewui.com/components/datetimePicker.html | 
|      * @property {Boolean}            show                用于控制选择器的弹出与收起 ( 默认 false ) | 
|      * @property {Boolean}            showToolbar            是否显示顶部的操作栏  ( 默认 true ) | 
|      * @property {String | Number}    value                绑定值 | 
|      * @property {String}            title                顶部标题 | 
|      * @property {String}            mode                展示格式 mode=date为日期选择,mode=time为时间选择,mode=year-month为年月选择,mode=datetime为日期时间选择  ( 默认 ‘datetime ) | 
|      * @property {Number}            maxDate                可选的最大时间  默认值为后10年 | 
|      * @property {Number}            minDate                可选的最小时间  默认值为前10年 | 
|      * @property {Number}            minHour                可选的最小小时,仅mode=time有效   ( 默认 0 ) | 
|      * @property {Number}            maxHour                可选的最大小时,仅mode=time有效      ( 默认 23 ) | 
|      * @property {Number}            minMinute            可选的最小分钟,仅mode=time有效      ( 默认 0 ) | 
|      * @property {Number}            maxMinute            可选的最大分钟,仅mode=time有效   ( 默认 59 ) | 
|      * @property {Function}            filter                选项过滤函数 | 
|      * @property {Function}            formatter            选项格式化函数 | 
|      * @property {Boolean}            loading                是否显示加载中状态   ( 默认 false ) | 
|      * @property {String | Number}    itemHeight            各列中,单个选项的高度   ( 默认 44 ) | 
|      * @property {String}            cancelText            取消按钮的文字  ( 默认 '取消' ) | 
|      * @property {String}            confirmText            确认按钮的文字  ( 默认 '确认' ) | 
|      * @property {String}            cancelColor            取消按钮的颜色  ( 默认 '#909193' ) | 
|      * @property {String}            confirmColor        确认按钮的颜色  ( 默认 '#3c9cff' ) | 
|      * @property {String | Number}    visibleItemCount    每列中可见选项的数量  ( 默认 5 ) | 
|      * @property {Boolean}            closeOnClickOverlay    是否允许点击遮罩关闭选择器  ( 默认 false ) | 
|      * @property {Array}            defaultIndex        各列的默认索引 | 
|      * @event {Function} close 关闭选择器时触发 | 
|      * @event {Function} confirm 点击确定按钮,返回当前选择的值 | 
|      * @event {Function} change 当选择值变化时触发 | 
|      * @event {Function} cancel 点击取消按钮 | 
|      * @example  <u-datetime-picker :show="show" :value="value1"  mode="datetime" ></u-datetime-picker> | 
|      */ | 
|     export default { | 
|         name: 'datetime-picker', | 
|         mixins: [uni.$u.mpMixin, uni.$u.mixin, props], | 
|         data() { | 
|             return { | 
|                 columns: [], | 
|                 innerDefaultIndex: [], | 
|                 innerFormatter: (type, value) => value | 
|             } | 
|         }, | 
|         watch: { | 
|             show(newValue, oldValue) { | 
|                 if (newValue) { | 
|                     this.updateColumnValue(this.innerValue) | 
|                 } | 
|             }, | 
|             propsChange() { | 
|                 this.init() | 
|             } | 
|         }, | 
|         computed: { | 
|             // 如果以下这些变量发生了变化,意味着需要重新初始化各列的值 | 
|             propsChange() { | 
|                 return [this.mode, this.maxDate, this.minDate, this.minHour, this.maxHour, this.minMinute, this.maxMinute, this.filter, this.value, ] | 
|             } | 
|         }, | 
|         mounted() { | 
|             this.init() | 
|         }, | 
|         methods: { | 
|             init() { | 
|                 this.innerValue = this.correctValue(this.value) | 
|                 this.updateColumnValue(this.innerValue) | 
|             }, | 
|             // 在微信小程序中,不支持将函数当做props参数,故只能通过ref形式调用 | 
|             setFormatter(e) { | 
|                 this.innerFormatter = e | 
|             }, | 
|             // 关闭选择器 | 
|             close() { | 
|                 if (this.closeOnClickOverlay) { | 
|                     this.$emit('close') | 
|                 } | 
|             }, | 
|             // 点击工具栏的取消按钮 | 
|             cancel() { | 
|                 this.$emit('cancel') | 
|             }, | 
|             // 点击工具栏的确定按钮 | 
|             confirm() { | 
|                 this.$emit('confirm', { | 
|                     value: this.innerValue, | 
|                     mode: this.mode | 
|                 }) | 
|                 this.$emit('input', this.innerValue) | 
|             }, | 
|             //用正则截取输出值,当出现多组数字时,抛出错误 | 
|             intercept(e,type){ | 
|                 let judge = e.match(/\d+/g) | 
|                 //判断是否掺杂数字 | 
|                 if(judge.length>1){ | 
|                     uni.$u.error("请勿在过滤或格式化函数时添加数字") | 
|                     return 0 | 
|                 }else if(type&&judge[0].length==4){//判断是否是年份 | 
|                     return judge[0] | 
|                 }else if(judge[0].length>2){ | 
|                     uni.$u.error("请勿在过滤或格式化函数时添加数字") | 
|                     return 0 | 
|                 }else{ | 
|                     return judge[0] | 
|                 } | 
|             }, | 
|             // 列发生变化时触发 | 
|             change(e) { | 
|                 const { indexs, values } = e | 
|                 let selectValue = '' | 
|                 if(this.mode === 'time') { | 
|                     // 根据value各列索引,从各列数组中,取出当前时间的选中值 | 
|                     selectValue = `${this.intercept(values[0][indexs[0]])}:${this.intercept(values[1][indexs[1]])}` | 
|                 } else { | 
|                     // 将选择的值转为数值,比如'03'转为数值的3,'2019'转为数值的2019 | 
|                     const year = parseInt(this.intercept(values[0][indexs[0]],'year')) | 
|                     const month = parseInt(this.intercept(values[1][indexs[1]])) | 
|                     let date = parseInt(values[2] ? this.intercept(values[2][indexs[2]]) : 1) | 
|                     let hour = 0, minute = 0 | 
|                     // 此月份的最大天数 | 
|                     const maxDate = dayjs(`${year}-${month}`).daysInMonth() | 
|                     // year-month模式下,date不会出现在列中,设置为1,为了符合后边需要减1的需求 | 
|                     if (this.mode === 'year-month') { | 
|                         date = 1 | 
|                     } | 
|                     // 不允许超过maxDate值 | 
|                     date = Math.min(maxDate, date) | 
|                     if (this.mode === 'datetime') { | 
|                         hour = parseInt(this.intercept(values[3][indexs[3]])) | 
|                         minute = parseInt(this.intercept(values[4][indexs[4]])) | 
|                     } | 
|                     // 转为时间模式 | 
|                     selectValue = Number(new Date(year, month - 1, date, hour, minute)) | 
|                 } | 
|                 // 取出准确的合法值,防止超越边界的情况 | 
|                 selectValue = this.correctValue(selectValue) | 
|                 this.innerValue = selectValue | 
|                 this.updateColumnValue(selectValue) | 
|                 // 发出change时间,value为当前选中的时间戳 | 
|                 this.$emit('change', { | 
|                     value: selectValue, | 
|                     // #ifndef MP-WEIXIN || MP-TOUTIAO | 
|                     // 微信小程序不能传递this实例,会因为循环引用而报错 | 
|                     picker: this.$refs.picker, | 
|                     // #endif | 
|                     mode: this.mode | 
|                 }) | 
|             }, | 
|             // 更新各列的值,进行补0、格式化等操作 | 
|             updateColumnValue(value) { | 
|                 this.innerValue = value | 
|                 this.updateColumns() | 
|                 this.updateIndexs(value) | 
|             }, | 
|             // 更新索引 | 
|             updateIndexs(value) { | 
|                 let values = [] | 
|                 const formatter = this.formatter || this.innerFormatter | 
|                 const padZero = uni.$u.padZero | 
|                 if (this.mode === 'time') { | 
|                     // 将time模式的时间用:分隔成数组 | 
|                     const timeArr = value.split(':') | 
|                     // 使用formatter格式化方法进行管道处理 | 
|                     values = [formatter('hour', timeArr[0]), formatter('minute', timeArr[1])] | 
|                 } else { | 
|                     const date = new Date(value) | 
|                     values = [ | 
|                         formatter('year', `${dayjs(value).year()}`), | 
|                         // 月份补0 | 
|                         formatter('month', padZero(dayjs(value).month() + 1)) | 
|                     ] | 
|                     if (this.mode === 'date') { | 
|                         // date模式,需要添加天列 | 
|                         values.push(formatter('day', padZero(dayjs(value).date()))) | 
|                     } | 
|                     if (this.mode === 'datetime') { | 
|                         // 数组的push方法,可以写入多个参数 | 
|                         values.push(formatter('day', padZero(dayjs(value).date())), formatter('hour', padZero(dayjs(value).hour())), formatter('minute', padZero(dayjs(value).minute()))) | 
|                     } | 
|                 } | 
|   | 
|                 // 根据当前各列的所有值,从各列默认值中找到默认值在各列中的索引 | 
|                 const indexs = this.columns.map((column, index) => { | 
|                     // 通过取大值,可以保证不会出现找不到索引的-1情况 | 
|                     return Math.max(0, column.findIndex(item => item === values[index])) | 
|                 }) | 
|                 this.innerDefaultIndex = indexs | 
|             }, | 
|             // 更新各列的值 | 
|             updateColumns() { | 
|                 const formatter = this.formatter || this.innerFormatter | 
|                 // 获取各列的值,并且map后,对各列的具体值进行补0操作 | 
|                 const results = this.getOriginColumns().map((column) => column.values.map((value) => formatter(column.type, value))) | 
|                 this.columns = results | 
|             }, | 
|             getOriginColumns() { | 
|                 // 生成各列的值 | 
|                 const results = this.getRanges().map(({ type, range }) => { | 
|                     let values = times(range[1] - range[0] + 1, (index) => { | 
|                         let value = range[0] + index | 
|                         value = type === 'year' ? `${value}` : uni.$u.padZero(value) | 
|                         return value | 
|                     }) | 
|                     // 进行过滤 | 
|                     if (this.filter) { | 
|                         values = this.filter(type, values) | 
|                     } | 
|                     return { type, values } | 
|                 }) | 
|                 return results | 
|             }, | 
|             // 通过最大值和最小值生成数组 | 
|             generateArray(start, end) { | 
|                 return Array.from(new Array(end + 1).keys()).slice(start) | 
|             }, | 
|             // 得出合法的时间 | 
|             correctValue(value) { | 
|                 const isDateMode = this.mode !== 'time' | 
|                 if (isDateMode && !uni.$u.test.date(value)) { | 
|                     // 如果是日期类型,但是又没有设置合法的当前时间的话,使用最小时间为当前时间 | 
|                     value = this.minDate | 
|                 } else if (!isDateMode && !value) { | 
|                     // 如果是时间类型,而又没有默认值的话,就用最小时间 | 
|                     value = `${uni.$u.padZero(this.minHour)}:${uni.$u.padZero(this.minMinute)}` | 
|                 } | 
|                 // 时间类型 | 
|                 if (!isDateMode) { | 
|                     if (String(value).indexOf(':') === -1) return uni.$u.error('时间错误,请传递如12:24的格式') | 
|                     let [hour, minute] = value.split(':') | 
|                     // 对时间补零,同时控制在最小值和最大值之间 | 
|                     hour = uni.$u.padZero(uni.$u.range(this.minHour, this.maxHour, Number(hour))) | 
|                     minute = uni.$u.padZero(uni.$u.range(this.minMinute, this.maxMinute, Number(minute))) | 
|                     return `${ hour }:${ minute }` | 
|                 } else { | 
|                     // 如果是日期格式,控制在最小日期和最大日期之间 | 
|                     value = dayjs(value).isBefore(dayjs(this.minDate)) ? this.minDate : value | 
|                     value = dayjs(value).isAfter(dayjs(this.maxDate)) ? this.maxDate : value | 
|                     return value | 
|                 } | 
|             }, | 
|             // 获取每列的最大和最小值 | 
|             getRanges() { | 
|                 if (this.mode === 'time') { | 
|                     return [ | 
|                         { | 
|                             type: 'hour', | 
|                             range: [this.minHour, this.maxHour], | 
|                         }, | 
|                         { | 
|                             type: 'minute', | 
|                             range: [this.minMinute, this.maxMinute], | 
|                         }, | 
|                     ]; | 
|                 } | 
|                 const { maxYear, maxDate, maxMonth, maxHour, maxMinute, } = this.getBoundary('max', this.innerValue); | 
|                 const { minYear, minDate, minMonth, minHour, minMinute, } = this.getBoundary('min', this.innerValue); | 
|                 const result = [ | 
|                     { | 
|                         type: 'year', | 
|                         range: [minYear, maxYear], | 
|                     }, | 
|                     { | 
|                         type: 'month', | 
|                         range: [minMonth, maxMonth], | 
|                     }, | 
|                     { | 
|                         type: 'day', | 
|                         range: [minDate, maxDate], | 
|                     }, | 
|                     { | 
|                         type: 'hour', | 
|                         range: [minHour, maxHour], | 
|                     }, | 
|                     { | 
|                         type: 'minute', | 
|                         range: [minMinute, maxMinute], | 
|                     }, | 
|                 ]; | 
|                 if (this.mode === 'date') | 
|                     result.splice(3, 2); | 
|                 if (this.mode === 'year-month') | 
|                     result.splice(2, 3); | 
|                 return result; | 
|             }, | 
|             // 根据minDate、maxDate、minHour、maxHour等边界值,判断各列的开始和结束边界值 | 
|             getBoundary(type, innerValue) { | 
|                 const value = new Date(innerValue) | 
|                 const boundary = new Date(this[`${type}Date`]) | 
|                 const year = dayjs(boundary).year() | 
|                 let month = 1 | 
|                 let date = 1 | 
|                 let hour = 0 | 
|                 let minute = 0 | 
|                 if (type === 'max') { | 
|                     month = 12 | 
|                     // 月份的天数 | 
|                     date = dayjs(value).daysInMonth() | 
|                     hour = 23 | 
|                     minute = 59 | 
|                 } | 
|                 // 获取边界值,逻辑是:当年达到了边界值(最大或最小年),就检查月允许的最大和最小值,以此类推 | 
|                 if (dayjs(value).year() === year) { | 
|                     month = dayjs(boundary).month() + 1 | 
|                     if (dayjs(value).month() + 1 === month) { | 
|                         date = dayjs(boundary).date() | 
|                         if (dayjs(value).date() === date) { | 
|                             hour = dayjs(boundary).hour() | 
|                             if (dayjs(value).hour() === hour) { | 
|                                 minute = dayjs(boundary).minute() | 
|                             } | 
|                         } | 
|                     } | 
|                 } | 
|                 return { | 
|                     [`${type}Year`]: year, | 
|                     [`${type}Month`]: month, | 
|                     [`${type}Date`]: date, | 
|                     [`${type}Hour`]: hour, | 
|                     [`${type}Minute`]: minute | 
|                 } | 
|             }, | 
|         }, | 
|     } | 
| </script> | 
|   | 
| <style lang="scss" scoped> | 
|     @import '../../libs/css/components.scss'; | 
| </style> |