HarmonyOS 鸿蒙Next 想要实现TextInput组件的光标一直展示？

HarmonyOS 鸿蒙Next 想要实现TextInput组件的光标一直展示？ 我现在做的系统键盘和自定义键盘切换，输入的内容可以传给上面的TextInput，但是光标展示不出来的！有啥办法吗？

想要上面的TextInput一直展示光标，或者有什么办法可以绘制一个光标。

import { inputMethod } from '@kit.IMEKit';

@Entry
@Component
struct TestPage {
  @State codeText: string = "";
  private readonly verifyID: string = "keyboard";
  private readonly keyboardSystemID: string = "keyboardSystemID";
  private readonly keyboardCustomID: string = "keyboardCustomID";
  private inputController: inputMethod.InputMethodController = inputMethod.getController();
  private textConfig: inputMethod.TextConfig = {
    inputAttribute: {
      textInputType: inputMethod.TextInputType.TEXT,
      enterKeyType: inputMethod.EnterKeyType.NONE
    },
  };
  private isListen: boolean = false;
  controller: SearchController = new SearchController()
  private keyboardSystem: boolean = false;
  private keyboardCustom: boolean = true;
  private keyboardType: boolean = true

  build() {
    Column() {
      TextInput({ placeholder: '请输入', text: this.codeText })
        .onClick(() => {
          if (this.keyboardType) {
            this.getUIContext().getFocusController().requestFocus(this.keyboardSystemID)
          } else {
            this.getUIContext().getFocusController().requestFocus(this.keyboardCustomID)
          }
        })

      Text('中文键盘')
        .width(100)
        .height(50)
        .textAlign(TextAlign.Center)
        .border({ width: 1, color: '#C0C0C0' })
        .defaultFocus(this.keyboardSystem)
        .onFocus(() => {
          this.attachAndListen();
        })
        .onBlur(() => {
          this.off();
        })
        .onClick(() => {
          this.controller.stopEditing()
          this.attachAndListen();
        })
        .id(this.keyboardSystemID)

      Stack() {
        TextInput({ controller: this.controller, text: '股票键盘' })
          .caretColor('#00000000')
          .border({ width: 1, color: '#C0C0C0', radius: 0 })
          .defaultFocus(this.keyboardCustom)
          .width(100)
          .height(50)
          .backgroundColor('#00000000')
          .customKeyboard(this.CustomKeyboardBuilder())
          .onClick(() => {
            focusControl.requestFocus(this.verifyID);
          })
          .id(this.keyboardCustomID)
      }

    }
  }

  async attachAndListen(): Promise<void> {
    focusControl.requestFocus(this.verifyID);
    await this.inputController.attach(true, this.textConfig);
    this.listen();
  }

  listen() {
    if (this.isListen) {
      return;
    }
    this.inputController.on("insertText", (text: string) => {
      this.codeText += text;
    })

    this.inputController.on("deleteLeft", (length: number) => {
      this.codeText = this.codeText.substring(0, this.codeText.length - 1);
    })
    this.isListen = true;
  }

  off(): void {
    this.inputController.off("insertText");
    this.inputController.off("deleteLeft");
    this.isListen = false;
  }

  // 自定义键盘组件
  @Builder
  CustomKeyboardBuilder() {
    Column() {
      Button('x').onClick(() => {
        // 关闭自定义键盘
        this.controller.stopEditing()
      })
      Grid() {
        ForEach([1, 2, 3, 4, 5, 6, 7, 8, 9, '*', 0, '#'], (item: number | string) => {
          GridItem() {
            Button(item + "")
              .width(110).onClick(() => {
              this.codeText += item
            })
          }
        })
      }.maxCount(3).columnsGap(10).rowsGap(10).padding(5)
    }.backgroundColor(Color.Gray)
  }
}