fix(Calendar): 增加默认值

Author: ChenlingasMx

packages/core/src/Calendar/README.md

@@ -96,6 +96,7 @@ export default CalendarView
 | `bar` | 导航栏 | React.ReactNode | - |
 | `onChange` | 选择时间事件 |  (value: string) => void | - |
 | `renderDay` | 自定义渲染日期额外内容 | (date:any) => React.ReactNode | JSX.Element | - |
+| `value` | 值 |  Date | - |
 
 
 ### bar 参数

packages/core/src/Calendar/index.tsx

@@ -32,6 +32,8 @@ export interface CalendarProps extends ViewProps {
   showBar?: boolean;
   // 自定义渲染日期额外内容
   renderDay?: (date: any) => React.ReactNode | JSX.Element;
+  // 值
+  value?: Date;
 }
 
 const Calendar = (props: CalendarProps) => {
@@ -50,6 +52,7 @@ const Calendar = (props: CalendarProps) => {
     onChange,
     showBar = true,
     renderDay,
+    value,
   } = props;
   const { barRightText, title, barLeftText, onPressBarLeft, render } = bar;
   const [currentYear, setCurrentYear] = useState<number>(toYear);
@@ -60,6 +63,17 @@ const Calendar = (props: CalendarProps) => {
   const [nextData, setNextData] = useState<number[]>([]);
   const [lunarName, setLunarName] = useState('');
 
+  useEffect(() => {
+    if (value) {
+      let toYear = value.getFullYear();
+      let toMonth = value.getMonth();
+      let toDays = value.getDate();
+      setCurrentYear(toYear);
+      setCurrentMonth(toMonth);
+      setCurrentDays(toDays);
+    }
+  }, [value]);
+
   useEffect(() => {
     let toMonths = getMonths(currentYear, currentMonth, currentDays);
     setLastData(toMonths[0]);