HarmonyOS 如何等待异步的await完成之后再去执行后面的操作？

Question

如题：HarmonyOS 如何等待异步的await完成之后再去执行后面的操作？

Answer 1

demo：

async function myAsyncFunction(): Promise<string> {
  const result: string = await new Promise((resolve: Function) => {
    setTimeout(() => {
      resolve('Hello, world!');
    }, 3000);
  });
  console.info(result); // 输出： Hello, world!
  return result
}

@Entry
@Component
struct Index {
  @State message: string = 'Hello World';
  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(async () => {
            let res = await myAsyncFunction();
            console.info("res is: " + res);
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}

参考链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/async-concurrency-overview-V5\#asyncawait