如何使用react-native-fbsdk的图形API？

Question

我在github和Facebook开发者文档上阅读了该文档.
只有样品,仅此而已.没有API文件.

制作图谱API请求的代码是

const infoRequest = new GraphRequest(
  '/me',
  null,
  this._responseInfoCallback,
);

和回调

_responseInfoCallback(error: ?Object, result: ?Object) {
  if (error) {
    alert('Error fetching data: ' + error.toString());
  } else {
    alert('Success fetching data: ' + result.toString());
  }
}

这是制作图谱API请求的功能

testRequestGraphAPI(){
  const infoRequest = new GraphRequest(
  '/me',
  null,
  this._responseInfoCallback,
  );   
    new GraphRequestManager().addRequest(infoRequest).start();
}

但是,我找不到任何进一步的文件.我不知道每个参数做什么.

上面这些代码的结果就是这个.

我也不知道如何得到结果.

但是,当我尝试将'\ me'修改为'me？fields = id,name'时,它失败了.虽然我已经要求许可了

<LoginButton
  publishPermissions={["publish_actions,user_birthday, user_religion_politics, user_relationships, user_relationship_details, user_hometown, user_location, user_likes, user_education_history, user_work_history, user_website, user_managed_groups, user_events, user_photos, user_videos, user_friends, user_about_me, user_status, user_games_activity, user_tagged_places, user_posts, user_actions.video, user_actions.news, user_actions.books, user_actions.music, user_actions.fitness, public_profile, basic_info"]}
  onLoginFinished={
    (error, result) => {
      if (error) {
        alert("login has error: " + result.error);
      } else if (result.isCancelled) {
        alert("login is cancelled.");
      } else {
        AccessToken.getCurrentAccessToken().then(
          (data) => {
            meow_accesstoken = data.accessToken
            alert(meow_accesstoken.toString())
          }
        )
      }
    }
  }
  onLogoutFinished={() => alert("logout.")}/>  

但是它不打印出什么错误,只是对象Object.

所以,问题是我不明白Facebook提供的示例代码没有解释.

这是我的问题,我真的需要你帮助我:
首先,请检查我目前正在查看的javascript代码？
如何在react-native-fbsdk中使用图形API来检索一些用户信息(例如:全名)并成功显示它(使用警报)？GraphRequest()中的 每个参数都有用吗？_responseInfoCallback 中错误对象和结果对象的结构是什么？

解决方案
感谢@Samuel的回答,我更新了我的代码

testRequestGraphAPI: function(){    
        const infoRequest = new GraphRequest(
          '/me',
          {
            parameters: {
              fields: {
                string: 'email,name,first_name,middle_name,last_name' // what you want to get
              },
              access_token: {
                string: meow_accesstoken.toString() // put your accessToken here
              }
            }
          },
          this._responseInfoCallback // make sure you define _responseInfoCallback in same class
        );
    new GraphRequestManager().addRequest(infoRequest).start();
  }

和回调

  _responseInfoCallback: function(error: ?Object, result: ?Object) {
    alert("meow response");
    if (error) {
      alert('Error fetching data: ' + error.toString());
      console.log(Object.keys(error));// print all enumerable 
      console.log(error.errorMessage); // print error message
      // error.toString() will not work correctly in this case
      // so let use JSON.stringify()
      meow_json = JSON.stringify(error); // error object => json 
      console.log(meow_json); // print JSON 
    } else {
      alert('Success fetching data: ' + result.toString());
      console.log(Object.keys(result)); 
      meow_json = JSON.stringify(result); // result => JSON
      console.log(meow_json); // print JSON
    } 
  }

*注意:对于console.log(),您需要使用"远程调试JS",然后打开Chrome开发人员工具以查看日志.

Answer 1

不幸的是,react-native-fbsdk文档没有更新,示例也不能很好地工作.

我遇到了同样的问题,我通过尝试和错误解决了它.

要解决您的问题,您需要更改GraphRequest,将params和字段添加到其中,如下所示:

  <LoginButton
    onLoginFinished={
      (error, result) => {
        if (error) {
          alert("login has error: " + result.error);
        } else if (result.isCancelled) {
          alert("login is cancelled.");
        } else {

          AccessToken.getCurrentAccessToken().then(
            (data) => {
              let accessToken = data.accessToken
              alert(accessToken.toString())

              const responseInfoCallback = (error, result) => {
                if (error) {
                  console.log(error)
                  alert('Error fetching data: ' + error.toString());
                } else {
                  console.log(result)
                  alert('Success fetching data: ' + result.toString());
                }
              }

              const infoRequest = new GraphRequest(
                '/me',
                {
                  accessToken: accessToken,
                  parameters: {
                    fields: {
                      string: 'email,name,first_name,middle_name,last_name'
                    }
                  }
                },
                responseInfoCallback
              );

              // Start the graph request.
              new GraphRequestManager().addRequest(infoRequest).start()

            }
          )

        }
      }
    }
    onLogoutFinished={() => alert("logout.")}/>

您需要启用Remote JS Debug才能查看console.log()信息. https://facebook.github.io/react-native/docs/debugging.html

并且您可能需要获得一些权限才能获得比姓名和电子邮件更多的信息,因此最好查看Facebook Graph API文档:https://developers.facebook.com/docs/graph-api/overview/

参考:

https://github.com/facebook/react-native-fbsdk/issues/105#issuecomment-206501550

Answer 2

这是一个自定义按钮的例子,如果你想制作一个:)

FbLoginButton() {
 LoginManager
  .logInWithReadPermissions(['public_profile'])
  .then(function (result) {
    if (result.isCancelled) {
      alert('Login cancelled');
    } else {
      AccessToken
        .getCurrentAccessToken()
        .then((data) => {
          let accessToken = data.accessToken
          alert(accessToken.toString())

          const responseInfoCallback = (error, result) => {
            if (error) {
              console.log(error)
              alert('Error fetching data: ' + error.toString());
            } else {
              console.log(result)
              alert('Success fetching data: ' + result.toString());
            }
          }

          const infoRequest = new GraphRequest('/me', {
            accessToken: accessToken,
            parameters: {
              fields: {
                string: 'email,name,first_name,middle_name,last_name'
              }
            }
          }, responseInfoCallback);

          // Start the graph request.
          new GraphRequestManager()
            .addRequest(infoRequest)
            .start()

        })
    }
  }, function (error) {
    alert('Login fail with error: ' + error);
   });
  }