RichEditor组件如何主动弹出键盘（包括光标），以及主动收起键盘

import { promptAction } from '@kit.ArkUI' 
  
@Entry 
@Component 
struct JlrFocusTest { 
  controller: RichEditorController = new RichEditorController() 
  controller1: TextInputController = new TextInputController() 
  needFocusKey: string = 'RichEditor' 
  @State textFlag: string = "TextFlag"; 
  
  build() { 
    Column() { 
      RichEditor({ controller: this.controller }) 
        .key(this.needFocusKey) 
        .align(Alignment.TopStart) 
        .height(100) 
        .borderWidth(1) 
        .borderColor(Color.Red) 
        .width("100%") 
        .onPaste((event?: PasteEvent) => { 
        }) 
      Button('点我获取焦点').onClick((event: ClickEvent) => { 
        focusControl.requestFocus(this.needFocusKey) 
      }) 
      Button('点我失去焦点').onClick((event: ClickEvent) => { 
        focusControl.requestFocus('button') 
      }) 
      Button().width(0).height(0).key('button') 
    } 
    .width('100%') 
    .height('100%') 
  } 
}