HarmonyOS 对话框布局

间隙不是虚拟按键的高度，该间隙是dialog的规格问题，软键盘拉起后弹框和软键盘距离16vp导致的。

示例参考如下：

@Entry
@Component
struct CustomDialogPage {
  @State message: string = 'CustomDialogPage';
  customDialogController: CustomDialogController = new CustomDialogController({
    builder: CustomEditDialogWidget({
      tipString: '姓名',
      inputType: InputType.Normal,
      textInputConString: (info: string) => {
        // this.content = info
      }
    }),
    alignment: DialogAlignment.Bottom,
    maskColor: Color.Red, //1、蒙层颜色
    customStyle: true //2.1、弹窗位置
  });

  build() {
    Row() {
      Column() {
        Button(this.message).onClick(() => {
          this.customDialogController.open();
        })
      }
      .width('100%')
    }
    .height('100%')
  }
}

@CustomDialog
@Component
export struct CustomEditDialogWidget {
  controller?: CustomDialogController;
  @State textInputString: string = ""
  tipString: string = ""
  textInputConString = (info: string) => {
  }
  inputType: InputType = InputType.Normal

  build() {
    Column() {
      Text(`请输入${this.tipString}`).margin({ top: 20 })
      TextInput({ placeholder: `请输入${this.tipString}` })
        .width("90%")
        .backgroundColor(Color.White)
        .borderWidth(1)
        .borderColor("#666")
        .borderRadius(10)
        .margin({ top: 20 })
        .defaultFocus(true)
        .onChange((value: string) => {
          this.textInputString = value
        })
        .type(this.inputType)

      Row() {
        Text("取消")
          .fontColor("#333")
          .onClick(() => {
            this.controller?.close()
          })
          .padding({
            left: 35,
            right: 35,
            top: 15,
            bottom: 15
          })
        Text("|").opacity(0.5).height("100%")
        Text("确定")
          .fontColor("#000")
          .onClick(() => {
            if (this.textInputString !== "") {
              this.textInputConString(this.textInputString)
            }
            this.controller?.close()
          })
          .padding({
            left: 35,
            right: 35,
            top: 15,
            bottom: 15
          })
      }
      .width("100%")
      .height(50)
      .justifyContent(FlexAlign.SpaceAround)
      .margin({ top: 10 })

    }
    .width("90%")
    .borderRadius(15)
    .backgroundColor(Color.White)
    .borderWidth(5)
    .offset({ x: 0, y: 20 }) //2.2、弹窗位置,y等于16的时候刚刚好
  }
}
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