HarmonyOS CustomDialogController动态修改offset属性问题

@State assistantDialogX: number = this.deviceWidth - 80
@State assistantDialogY: number = this.deviceHeight - 80
assistantDialog = new CustomDialogController({
  builder: AssistantDialog(),
  customStyle: true,
  maskColor: 'rgba(0,0,0,0)',
  isModal: false,
  alignment: DialogAlignment.TopStart,
  offset: { dx: this.assistantDialogX, dy: this.assistantDialogY },
})
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想动态的修改offset里的dx和dy但是发现并不生效，是否有解决方案可以动态的修改offset的dx，dy值。