fix: date-picker keydown event not work

Author: tangjinzhou

components/date-picker/createPicker.js

@@ -194,8 +194,9 @@ export default function createPicker (TheCalendar, props) {
       return (
         <span
           class={props.pickerClass}
-          onFocus={focus}
-          onBlur={blur}
+          // tabIndex={props.disabled ? -1 : 0}
+          // onFocus={focus}
+          // onBlur={blur}
         >
           <VcDatePicker
             {...vcDatePickerProps}

components/vc-calendar/src/Picker.jsx

@@ -111,7 +111,7 @@ const Picker = {
 
     onKeyDown (event) {
       if (event.keyCode === KeyCode.DOWN && !this.sOpen) {
-        this.open()
+        this.openCalendar()
         event.preventDefault()
       }
     },
@@ -177,8 +177,8 @@ const Picker = {
     },
 
     focusCalendar () {
-      if (this.sOpen && this.calendarInstance && this.calendarInstance.context) {
-        this.calendarInstance.context.focus()
+      if (this.sOpen && this.calendarInstance && this.calendarInstance.componentInstance) {
+        this.calendarInstance.componentInstance.focus()
       }
     },
   },