HarmonyOS 如何实现打开弹窗后自动播放动画

import promptAction from '@ohos.promptAction'  
  
@Entry  
@Component  
struct Index {  
  @State message: string = '弹框'  
  @State animate: boolean = false;  
  @State rotateAngle: number = 0  
  
  @Builder customDialogBuilder() {  
    Column() {  
      Text('内容').fontSize(15).margin({ bottom: 50 })  
      Row() {  
        Text('点击旋转')  
          .fontSize(20)  
          .textAlign(TextAlign.Center)  
          .width(100)  
          .height(100)  
          .borderStyle(BorderStyle.Solid)  
          .borderWidth(5)  
          .borderColor(0xAFEEEE)  
          .onClick(() => {  
            this.rotateAngle = 360  
          })  
          .rotate({ angle: this.rotateAngle })  
          .animation({  
            duration: 1200,  
            curve: Curve.Linear,  
            iterations: -1, // 设置-1表示动画无限循环  
          })  
      }  
    }.height(300).padding(5)  
  }  
  
  
  build() {  
    Row() {  
      Column() {  
        Text('点击弹框')  
          .fontSize(50)  
          .fontWeight(FontWeight.Bold)  
          .onClick(() => {  
            promptAction.openCustomDialog({  
              builder: this.customDialogBuilder.bind(this)  
            })  
          })  
      }  
      .width('100%')  
    }  
    .height('100%')  
  }  
}