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https://gitee.com/vant-contrib/vant-weapp.git
synced 2025-04-06 03:58:05 +08:00
6d771e7338
* feat: cell 自定义组件 * [new feature] DatetimePicker：新增时间选择组件 * fix: support picker view * improvement：支持 picker-view
314 lines
9.3 KiB
JavaScript
314 lines
9.3 KiB
JavaScript
function partStartWithZero(num, strlen) {
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let zeros = '';
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while (zeros.length < strlen) {
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zeros += '0';
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}
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return (zeros + num).slice(-strlen);
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}
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function genNumber(begin, end, strlen) {
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let nums = [];
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while (begin <= end) {
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nums.push(partStartWithZero(begin, strlen));
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begin++;
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}
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return nums;
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}
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function moment(date, formatStr = 'YYYY:MM:DD') {
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if (!date && date !== 0) date = new Date();
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date = new Date(date);
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if (date.toString() === 'Invalid Date') throw new Error('Invalid Date');
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let getDateValue = (method, fn) => (fn ? fn(date[`get${method}`]()) : date[`get${method}`]());
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let map = new Map();
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map.set(/(Y+)/i, () => getDateValue('FullYear', year => (year + '').substr(4 - RegExp.$1.length)));
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map.set(/(M+)/, () => getDateValue('Month', month => partStartWithZero(month + 1, RegExp.$1.length)));
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map.set(/(D+)/i, () => getDateValue('Date', date => partStartWithZero(date, RegExp.$1.length)));
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map.set(/(H+)/i, () => getDateValue('Hours', hour => partStartWithZero(hour, RegExp.$1.length)));
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map.set(/(m+)/, () => getDateValue('Minutes', minute => partStartWithZero(minute, RegExp.$1.length)));
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map.set(/(s+)/, () => getDateValue('Seconds', second => partStartWithZero(second, RegExp.$1.length)));
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for (const [reg, fn] of map) {
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if (reg.test(formatStr)) {
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formatStr = formatStr.replace(RegExp.$1, fn.call(null));
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}
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}
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return formatStr;
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}
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const LIMIT_YEAR_COUNT = 50;
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class DatePicker {
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constructor(format, date = new Date(), cb) {
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this.types = ['year', 'month', 'day', 'hour', 'minute', 'second'];
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this.months = genNumber(1, 12, 2);
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this.hours = genNumber(0, 23, 2);
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this.seconds = genNumber(0, 59, 2);
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this.minutes = genNumber(0, 59, 2);
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// this.format(format);
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this.init(date, cb);
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}
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getYears(year) {
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let mid = Math.floor(LIMIT_YEAR_COUNT / 2);
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let min = year - mid;
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let max = year + (LIMIT_YEAR_COUNT - mid);
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return genNumber(min, max, 4);
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}
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lastDay(year, month) {
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return month !== 12 ? new Date(
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new Date(`${year}/${month + 1}/1`).getTime() - (24 * 60 * 60 * 1000)
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).getDate() : 31;
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}
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init(date, cb) {
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let d = new Date(date);
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let y = d.getFullYear();
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let m = d.getMonth() + 1;
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let years = this.getYears(y);
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let lastDay = this.lastDay(y, m);
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let days = genNumber(1, lastDay, 2);
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this._years = years;
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this._dataList = [years, this.months, days, this.hours, this.minutes, this.seconds];
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this._indexs = [25, m - 1, d.getDate(), d.getHours(), d.getMinutes(), d.getSeconds()];
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cb && cb({
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dataList: this._dataList,
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indexs: this._indexs
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});
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}
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update(col, index, cb) {
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let type = this.types[col];
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switch (type) {
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case 'year':
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this._updateYear(col, index, cb);
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break;
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case 'month':
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this._updateMonth(col, index, cb);
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break;
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default:
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this._indexs[col] = index;
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cb && cb({
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dataList: this._dataList,
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indexs: this._indexs,
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updateColumn: col,
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updateIndex: index
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});
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}
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}
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_updateYear(col, index, cb) {
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let years = this._dataList[col];
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let year = years[index];
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this._dataList[col] = this.getYears(+year);
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this._indexs[col] = Math.floor(LIMIT_YEAR_COUNT / 2);
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cb && cb({
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dataList: this._dataList,
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indexs: this._indexs,
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updateColumn: col
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});
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}
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_updateMonth(col, index, cb) {
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let month = this._dataList[col][index];
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let year = this._dataList[0][this._indexs[0]];
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let lastDay = this.lastDay(+year, +month);
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this._indexs[col] = index;
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this._dataList[2] = genNumber(1, lastDay, 2);
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this._indexs[2] = this._indexs[2] >= this._dataList[2].length ? this._dataList[2].length - 1 : this._indexs[2];
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cb && cb({
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dataList: this._dataList,
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indexs: this._indexs,
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updateColumn: 2,
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updateIndex: this._indexs[2]
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});
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cb && cb({
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dataList: this._dataList,
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indexs: this._indexs,
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updateColumn: 1,
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updateIndex: index
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});
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}
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}
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// 组件内使用 this.indexs 好像有问题
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let _indexs = [];
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Component({
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properties: {
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placeholder: {
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type: String,
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value: '请选择时间'
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},
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format: {
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type: String,
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value: 'YYYY-MM-DD HH:mm:ss'
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},
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native: {
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type: Boolean
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},
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pickerView: {
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type: Boolean
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},
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date: {
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type: String,
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value: new Date()
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},
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notUse: {
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type: Array
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}
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},
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externalClasses: ['placeholder-class'],
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data: {
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transPos: [0, 0, 0, 0, 0, 0]
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},
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attached() {
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this.use = {}
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;['years', 'months', 'days', 'hours', 'minutes', 'seconds'].forEach((item) => {
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if ((this.data.notUse || []).indexOf(item) === -1) { this.use[item] = true }
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});
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this.setData({ use: this.use });
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this.data.pickerView && !this.data.native && this.showPicker();
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},
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ready() {
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// 微信 bug，如果不先定义会导致不能选中
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this.setData({
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"dataList":[
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[
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"2018","2019","2020","2021","2022","2023","2024","2025","2026","2027","2028","2029","2030","2031","2032","2033","2034","2035","2036","2037","2038","2039","2040","2041","2042","2043"
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],
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genNumber(1, 12, 2),
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genNumber(0, 31, 2),
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genNumber(0, 23, 2),
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genNumber(0, 59, 2),
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genNumber(0, 59, 2)
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]
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})
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this.picker = new DatePicker(this.data.format, this.data.date, this.updatePicker.bind(this));
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},
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methods: {
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updatePicker({ dataList, indexs, updateColumn, updateIndex }) {
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let updateData = {};
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_indexs = indexs;
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// 指定更新某列数据，表示某列数据更新
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if (updateColumn) {
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updateData[`transPos[${updateColumn}]`] = -36 * _indexs[updateColumn];
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updateData[`dataList[${updateColumn}]`] = dataList[updateColumn];
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}
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// 指定更新某列索引，表示某列数据选中的索引已更新
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if (typeof updateIndex !== 'undefined') {
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updateData[`transPos[${updateColumn}]`] = -36 * _indexs[updateColumn];
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updateData[`selected[${updateColumn}]`] = indexs[updateColumn];
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}
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// 只在初始化时设置全部的值，其他的都局部更新
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if (!updateColumn && typeof updateIndex === 'undefined') {
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updateData = { dataList, selected: indexs };
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_indexs.forEach((item, index) => {
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updateData[`transPos[${index}]`] = -item * 36;
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});
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}
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this.setData(updateData);
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},
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touchmove(e) {
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let { changedTouches, target } = e;
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let col = target.dataset.col;
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let { clientY } = changedTouches[0];
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if (!col) return;
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let updateData = {};
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let itemLength = this.data.dataList[col].length;
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updateData[`transPos[${col}]`] = this.startTransPos + (clientY - this.startY);
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if (updateData[`transPos[${col}]`] >= 0) {
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updateData[`transPos[${col}]`] = 0;
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} else if (-(itemLength - 1) * 36 >= updateData[`transPos[${col}]`]) {
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updateData[`transPos[${col}]`] = -(itemLength - 1) * 36;
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}
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this.setData(updateData);
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},
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touchStart(e) {
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let { target, changedTouches } = e;
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let col = target.dataset.col;
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let touchData = changedTouches[0];
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if (!col) return;
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this.startY = touchData.clientY;
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this.startTime = e.timeStamp;
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this.startTransPos = this.data.transPos[col];
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},
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touchEnd(e) {
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let { col } = e.target.dataset;
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if (!col) return;
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let pos = this.data.transPos[col];
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let itemIndex = Math.round(pos / 36);
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this.columnchange({ detail: { column: +col, value: -itemIndex } });
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},
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columnchange(e) {
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let { column, value } = e.detail;
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_indexs[column] = value;
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this.picker.update(column, value, this.updatePicker.bind(this));
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this.data.pickerView && !this.data.native && this.change({detail: {value: _indexs}})
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},
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getFormatStr() {
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let date = new Date()
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;['FullYear', 'Month', 'Date', 'Hours', 'Minutes', 'Seconds'].forEach((key, index) => {
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let value = this.data.dataList[index][_indexs[index]];
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if (key === 'Month') {
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value = +this.data.dataList[index][_indexs[index]] - 1;
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}
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date[`set${key}`](+value);
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});
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return moment(date, this.data.format);
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},
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showPicker() {
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this.setData({ show: true });
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},
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hidePicker(e) {
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let { action } = e.currentTarget.dataset;
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this.setData({ show: false });
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if (action === 'cancel') {
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this.cancel({ detail: {} });
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} else {
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this.change({ detail: { value: _indexs } });
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}
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},
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change(e) {
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let { value } = e.detail;
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let data = this.data.dataList.map((item, index) => {
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return +item[value[index]];
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});
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this.triggerEvent('change', { value: data });
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// 为了支持原生 picker view，每次 change 都需要手动 columnchange
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if (this.data.pickerView && this.data.native) {
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for (let index = 0; index < value.length; index++) {
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if (_indexs[index] !== value[index]) {
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this.columnchange({
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detail: {
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column: index, value: value[index]
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}
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})
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break // 这里每次只处理一列，否则会出现日期值为 undefined 的情况
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}
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}
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}
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this.setData({ text: this.getFormatStr() });
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},
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cancel(e) {
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this.triggerEvent('cancel', e.detail);
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}
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}
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});
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