HarmonyOS 方法里有interface，实现问题

ArkTS不支持匿名类，建议使用嵌套类实现。因为使用匿名类创建的对象类型未知，这与ArkTS不支持structural typing和对象字面量的类型冲突。

// 原先

class A {
  foo() {
    let a = new class {
      v: number = 123
    }();
  }
}
// 现在

class A {
  foo() {
    class B {
      v: number = 123
    }
    let b = new B();
  }
}
//或者

export interface IVoiceRecordListener<T> {
  onSucces:(t: T)=> void
  onFailed:(code: string, reason: string)=>void
}

let obj: IVoiceRecordListener<string> = {
  onSucces:()=>{},
  onFailed:()=>{}
}

关于使用方法可以参考如下示例：

import { MyInterDemo } from '../interface/MyInterDemo'

@Entry
@Component
struct TestInterfacePage {

  testInter(inter: MyInterDemo) {
    console.log('testInter');
    inter.func_1();
    inter.func_2();
    inter.func_3('hello');
  }

  build() {
    Row() {
      Column() {
        Button('Test interface')
          .onClick(() => {
            let demo: MyInterDemo = {
              func_1: () => {
                console.log('func_1');
              },
              func_2: () => {
                console.log('func_2');
                return true;
              },
              func_3: (arg: string) => {
                console.log('func_3:' + arg);
              }
            }
            this.testInter(demo);
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}

MyInterDemo

export interface MyInterDemo {
  func_1: () => void;
  func_2: () => boolean;
  func_3: (arg: string) => void;
}