提交初始版本，使用vant ui库

miniprogram_npm/@vant/weapp/calendar/index.wxs

@@ -0,0 +1,37 @@
+/* eslint-disable */
+var utils = require('./utils.wxs');
+
+function getMonths(minDate, maxDate) {
+  var months = [];
+  var cursor = getDate(minDate);
+
+  cursor.setDate(1);
+
+  do {
+    months.push(cursor.getTime());
+    cursor.setMonth(cursor.getMonth() + 1);
+  } while (utils.compareMonth(cursor, getDate(maxDate)) !== 1);
+
+  return months;
+}
+
+function getButtonDisabled(type, currentDate, minRange) {
+  if (currentDate == null) {
+    return true;
+  }
+
+  if (type === 'range') {
+    return !currentDate[0] || !currentDate[1];
+  }
+
+  if (type === 'multiple') {
+    return currentDate.length < minRange;
+  }
+
+  return !currentDate;
+}
+
+module.exports = {
+  getMonths: getMonths,
+  getButtonDisabled: getButtonDisabled
+};