// xxx.ets
    @Entry
    @Component
    struct Page {

      @State color: Color = Color.Blue;

      build() {
        Column({ space: 20 }) {
          Button('弹窗')
            .width(180).height(80)
            .backgroundColor(this.color)
            .onClick(()=>{
             AlertDialog.show({
               title: '弹窗标题',
               message: '弹窗内容',
               autoCancel: true,
               alignment: DialogAlignment.Default,
               offset: { dx: 0, dy: -20 },
               gridCount: 3,
               primaryButton:({
                 value:'返回',
                 fontColor: Color.Black,
                 backgroundColor: Color.Orange,
                 action: () => {
                   console.log("回调")
                 }