HarmonyOS鸿蒙Next中指纹悬浮框实现

指纹悬浮框实现请参考下方案例：

前提条件：确保样机已经录入指纹，并开启指纹解锁

import userIAM_userAuth from '@ohos.userIAM.userAuth';

const authParam : userIAM_userAuth.AuthParam = {
  challenge: new Uint8Array([1, 1, 1, 1, 1, 1]),
  authType: [userIAM_userAuth.UserAuthType.FINGERPRINT],
  authTrustLevel: userIAM_userAuth.AuthTrustLevel.ATL1,
};
const widgetParam : userIAM_userAuth.WidgetParam = {
  title: '请使用指纹解锁',
};

@Component
struct AuthTestExample {
  build() {
    Column() {
      Button('AuthTest')
        .onClick(() => {
          try {
            //获取认证对象
            let userAuthInstance = userIAM_userAuth.getUserAuthInstance(authParam, widgetParam);
            console.log('get userAuth instance success');
            //订阅认证结果
            userAuthInstance.on('result', {
              onResult (result) {
                console.log('userAuthInstance callback result = ' + JSON.stringify(result));
                if (result.result == userIAM_userAuth.UserAuthResultCode.SUCCESS) {
                  console.log('userAuthInstance success');
                }
              }
            });
            console.log('auth on success');
            userAuthInstance.start();
            console.log('auth start success');
          } catch (error) {
            console.log('auth catch error: ' + JSON.stringify(error));
          }
        })
        .fontSize(30)
        .height(50)
    }.height('100%').width('100%').justifyContent(FlexAlign.Center)
  }
}

{
  "module": {
    ......
    "requestPermissions": [
      {
        "name": "ohos.permission.ACCESS_BIOMETRIC",
      }
    ]
  }
}