HarmonyOS 鸿蒙Next 自定义键盘把光标跳动问题

看一下这个参考：

光标的监听位置需要在TextInput的onchange事件中去感知光标的变化，然后调整光标位置

例如：

onChange() {
  this.controller.caretPosition(++this.ep)
}

@Entry
@Component
struct TextInputExample {
  controller: TextInputController = new TextInputController()
  @State inputValue: string = ""
  ep: number = 0;
  del:boolean = false;

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

  build() {
    Column() {
      TextInput({ controller: this.controller, text: this.inputValue })
        // 绑定自定义键盘
        .customKeyboard(this.CustomKeyboardBuilder())
        .margin(10)
        .border({ width: 1 })
        //感知光标的变化，然后调整光标位置
        .onChange(() => {
          if(this.del){
            this.controller.caretPosition(--this.ep)
          }else{
            this.controller.caretPosition(++this.ep)
          }
        })
        .onTextSelectionChange((ss) => {
          this.ep = ss;
        })
    }
  }
}