HarmonyOS通过方法调用的loading有吗？

// 自定义弹窗.ets 
import promptAction from '@ohos.promptAction' 
 
let myDialogBuilder: CustomBuilder; 
let customDialogId: number = 0 
 
@Builder 
export function customDialogBuilder() { 
  Column() { 
 
    LoadingProgress() 
      .color(Color.Blue) 
      .layoutWeight(1) 
  }.height(200).padding(5) 
  .backgroundColor(Color.Transparent) 
  .width('100%') 
 
} 
 
export function changeDialogBuilder(builder: CustomBuilder) { 
  myDialogBuilder = builder 
} 
 
 
export class MyShowTest { 
  showTest() { 
    if (myDialogBuilder === undefined) { 
      return 
    } 
    promptAction.openCustomDialog({ 
      builder: myDialogBuilder 
    }).then((dialogId: number) => { 
      customDialogId = dialogId 
    }) 
    setTimeout(() => { 
      promptAction.closeCustomDialog(customDialogId) 
    }, 2000); 
  } 
} 
 
//在@entry中先设置builder，再直接调用showTest即可 
let myShowTest = new MyShowTest() 
 
@Entry 
@Component 
struct Index { 
  @State message: string = 'Hello World' 
 
  onPageShow(): void { 
    changeDialogBuilder(customDialogBuilder.bind(this)) 
  } 
 
  build() { 
    Row() { 
      Column() { 
        Text(this.message) 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
          .onClick(() => { 
            myShowTest.showTest() 
          }) 
      } 
      .width('100%') 
    } 
    .height('100%') 
 
    .backgroundColor(Color.Orange) 
  } 
}
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