Question

如果我使用以下方法从Twitter API解析推文：

  tweet.entities.media

我得到了以下的json。但是我如何访问media_url属性？它嵌套在json对象内部的一个非常困难的地方。

 tweet.entities.media[0].media_url

返回错误。

{
  "image": [
    {
      "id": 511403875438301200,
      "id_str": "511403875438301185",
      "indices": [
        44,
        66
      ],
      "media_url": "http://some_url.jpg",
      "media_url_https" : "https: //some_url.jpg",
      "url": "http://whatever.com",
      "display_url": "pic.twitter.com/BNIPh3ZlRD",
      "expanded_url": "https://twitter.com/some_url/1",
      "type": "photo",
      "sizes": {
        "thumb": {
          "w": 150,
          "h": 150,
          "resize": "crop"
        },
        "small": {
          "w": 680,
          "h": 482,
          "resize": "fit"
        },
        "large": {
          "w": 2048,
          "h": 1453,
          "resize": "fit"
        },
        "medium": {
          "w": 1200,
          "h": 851,
          "resize": "fit"
        }
      }
    }
  ]
}

Answer 1

我如何访问media_url？

在我看来，你只是缺少image[0]：

tweet.entities.media.image[0].media_url

＆＃13;

$(document).ready(function() {
var tweet = jQuery.parseJSON( '{"entities":{"media":{"image":[{"id":511403875438301200,"id_str":"511403875438301185","indices":[44,66],"media_url":"http://pbs.twimg.com/media/BxjfHXxCEAETmig.jpg","media_url_https":"https: //pbs.twimg.com/media/BxjfHXxCEAETmig.jpg","url":"http://whatever.com","display_url":"pic.twitter.com/BNIPh3ZlRD","expanded_url":"https://twitter.com/AWish4Me/status/511403876642463744/photo/1","type":"photo","sizes":{"thumb":{"w":150,"h":150,"resize":"crop"},"small":{"w":680,"h":482,"resize":"fit"},"large":{"w":2048,"h":1453,"resize":"fit"},"medium":{"w":1200,"h":851,"resize":"fit"}}}]}}}');
document.body.innerHTML = tweet.entities.media.image[0].media_url;
});

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

＆＃13;

Answer 2

我想我明白了。它打破了因为一些推文没有图片.. 我不得不检查空的属性......

 return  {"image_url":(tweet.entities.media!==undefined)?((tweet.entities.media[0]!=="")?(tweet.entities.media[0].media_url):('')): ('') };

如何获取图片网址

2 个答案: