Question

我一直在做一个侧面项目并遇到了障碍。我可以搜索标签并很好地显示他们的图片结果，但我也想把每张图片下面的细节，特别是位置信息。我在Javascript中这样做，并注释掉了我认为需要调整的行，但删除了注释标记，甚至图片都没有显示出来。有小费吗？通过调用Instagram打印的JSON对象返回此数据：

Object
  - data: Array[20]
    - 0: Object
      + caption: Object
      + comments: Object
        created_time: "1334402906"
        filter: "Nashville"
        id: "169306311223447303_5913362"
      - images: Object
        + low_resolution: Object
        - standard_resolution: Object
          height: 612
          url: "http://distilleryimage7.instagram.com/f3f8d7b2862411e19dc71231380fe523_7.jpg"
          width: 612
        + thumbnail: Object
        + likes: Object
          link: "http://instagr.am/p/JZfzFqtI8H/"
          location: Object
          tags: Array[1]
          type: "image"
          user: Object

我的代码看起来像这样：

// Instantiate an empty object.
var Instagram = {};

// Small object for holding important configuration data.
Instagram.Config = {
  clientID: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
  apiHost: 'https://api.instagram.com'
};


// ************************
// ** Main Application Code
// ************************
(function(){
  var photoTemplate, resource;

  function init(){
    bindEventHandlers();
    photoTemplate = _.template($('#photo-template').html());
  }

  function toTemplate(photo){
    photo = {
      count: photo.likes.count,
      avatar: photo.user.profile_picture,
      photo: photo.images.low_resolution.url,
      url: photo.link
      //location: photo.location  <--------------------------This line.
    };

    return photoTemplate(photo);
  }

  function toScreen(photos){
    var photos_html = '';
    //var photos_location = ''; <------------------------This line.

    $('.paginate a').attr('data-max-tag-id', photos.pagination.next_max_id)
                    .fadeIn();

    $.each(photos.data, function(index, photo){
      photos_html += toTemplate(photo);
      //photos_location += toTemplate(photo); <-----------------This line.
    });

    $('div#photos-wrap').append(photos_html);
    //$('div#photos-wrap').append(photos_location) <------------------This line. 
  }


  function generateResource(tag){
    var config = Instagram.Config, url;

    if(typeof tag === 'undefined'){
      throw new Error("Resource requires a tag. Try searching for cherry blossoms.");
    } else {
      // Make sure tag is a string, trim any trailing/leading whitespace and take only the first
      // word, if there are multiple.
      tag = String(tag).trim().split(" ")[0];
    }

    // Configures the URL to search for pictures that fit the tag description.
    url = config.apiHost + "/v1/tags/" + tag + "/media/recent?callback=?&client_id=" + config.clientID;

    return function(max_id){
      var next_page;
      if(typeof max_id === 'string' && max_id.trim() !== '') {
        next_page = url + "&max_id=" + max_id;
      }
      return next_page || url;
    };
  }

  function paginate(max_id){
    $.getJSON(generateUrl(tag), toScreen);
  }

  function search(tag){
    resource = generateResource(tag);
    $('.paginate a').hide();
    $('#photos-wrap *').remove();
    fetchPhotos();
  }

  function fetchPhotos(max_id){
    $.getJSON(resource(max_id), toScreen);
  }

  function bindEventHandlers(){
    $('body').on('click', '.paginate a.btn', function(){
      var tagID = $(this).attr('data-max-tag-id');
      fetchPhotos(tagID);
      return false;
    });

    // Bind an event handler to the `submit` event on the form
    $('form').on('submit', function(e){

      // Stop the form from fulfilling its destinty.
      e.preventDefault();

      // Extract the value of the search input text field.
      var tag = $('input.search-tag').val().trim();

      // Invoke `search`, passing `tag` (unless tag is an empty string).
      if(tag) {
        search(tag);
      };

    });

  }

  function showPhoto(p){
    $(p).fadeIn();
  }

  // Public API
  Instagram.App = {
    search: search,
    showPhoto: showPhoto,
    init: init
  };
}());


$(function(){
  Instagram.App.init();

  Instagram.App.search('takoyaki');
});

Answer 1

这样，只要照片有位置数据，并非所有照片都有

CSS

body {
  background: #e3e8ec url(http://grammy.eduvoyage.com/images/tile.png) repeat 50% 0;
}
#search {
  height: 40px;
  padding: 10px;
  text-align: center;
  position: fixed;
  width: 240px;
  margin: 0 auto;
  z-index: 100;
  left: 50%;
  top: 0;
  margin-left: -130px;
  border-radius:0 0 5px 5px;
}

.search-wrap {
  background: white;
  line-height: 30px;
  height: 30px;
  text-align: left;
  border-radius: 3px;
  width: 230px;
  margin: 0;
  border: 1px solid #ddd;
}

#photos-wrap {
  width: 810px;
  margin: 70px auto 40px auto;
  position: relative;
  z-index: 1;
}

.photo .avatar {
  width: 40px;
  height: 40px;
  padding: 2px;
  position: absolute;
  bottom: 11px;
  right: 8px;
  background: white;
}

.photo  {
  margin-bottom: 20px;
  float: left;
  position: relative;
  width: 250px;
  height: 250px;
  border-radius: 5px;
  background: white;
  padding: 5px;
  margin: 5px;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}

.photo .heart {
  height: 16px;
  position: absolute;
  left: 13px;
  bottom: 16px;
  padding: 0 5px 0 22px;
  font-size: 12px;
  font-weight: bold;
  line-height: 16px;
  border-radius: 2px;
  border: 1px solid #ddd;
  background: white url('http://grammy.eduvoyage.com/images/fav.png') no-repeat 2px 0;
}

.paginate {
  display: block;
  clear: both;
  margin: 10px;
  text-align: center;
  margin: 0 auto;
  padding: 20px 0;
  height: 100px;
}

.location {
    position: relative;
    top: -48px;
    left: 7px;
    border-style: solid;
    border-width: 1px;
    border-radius: 3px;
    background-color: white;
}

HTML

      <div id='photos-wrap'>
      </div>

      <div class='paginate'>
        <a class='btn'  style='display:none;' data-max-tag-id='' href='#'>View More...</a>
      </div>
    </div>
  </div>
</div>

<script type="text/template" id="photo-template">
  <div class='photo'>
    <a href='<%= url %>' target='_blank'>
      <img class='main' src='<%= photo %>' width='250' height='250' style='display:none;' onload='Instagram.App.showPhoto(this);'/>
    </a>
    <img class='avatar' width='40' height='40' src='<%= avatar %>' />
    <span class='heart'><strong><%= count %></strong></span>
    <span class='location'><%= longitude %> <%= latitude %></span>
  </div>
</script>

的Javascript

// Instantiate an empty object.
var Instagram = {};

// Small object for holding important configuration data.
Instagram.Config = {
  clientID: '4895197dfce340cb9004101ce6ae9215',
  apiHost: 'https://api.instagram.com'
};


// ************************
// ** Main Application Code
// ************************
(function(){
  var photoTemplate, resource;

  function init(){
    bindEventHandlers();
    photoTemplate = _.template($('#photo-template').html());
  }

  function toTemplate(photo){
    photo = {
      count: photo.likes.count,
      avatar: photo.user.profile_picture,
      photo: photo.images.low_resolution.url,
      url: photo.link,
      longitude: photo.location && photo.location.longitude,
      latitude: photo.location && photo.location.latitude
    };

    return photoTemplate(photo);
  }

  function toScreen(photos){
    var photos_html = '';

    $('.paginate a').attr('data-max-tag-id', photos.pagination.next_max_id)
                    .fadeIn();

    $.each(photos.data, function(index, photo){
      photos_html += toTemplate(photo);
    });

    $('div#photos-wrap').append(photos_html);
  }

  function generateResource(tag){
    var config = Instagram.Config, url;

    if(typeof tag === 'undefined'){
      throw new Error("Resource requires a tag. Try searching for cats.");
    } else {
      // Make sure tag is a string, trim any trailing/leading whitespace and take only the first 
      // word, if there are multiple.
      tag = String(tag).trim().split(" ")[0];
    }

    url = config.apiHost + "/v1/tags/" + tag + "/media/recent?callback=?&client_id=" + config.clientID;

    return function(max_id){
      var next_page;
      if(typeof max_id === 'string' && max_id.trim() !== '') {
        next_page = url + "&max_id=" + max_id;
      }
      return next_page || url;
    };
  }

  function paginate(max_id){    
    $.getJSON(generateUrl(tag), toScreen);
  }

  function search(tag){
    resource = generateResource(tag);
    $('.paginate a').hide();
    $('#photos-wrap *').remove();
    fetchPhotos();
  }

  function fetchPhotos(max_id){
    $.getJSON(resource(max_id), toScreen);
  }

  function bindEventHandlers(){
    $('body').on('click', '.paginate a.btn', function(){
      var tagID = $(this).attr('data-max-tag-id');
      fetchPhotos(tagID);
      return false;
    });

    // Bind an event handler to the `submit` event on the form
    $('form').on('submit', function(e){

      // Stop the form from fulfilling its destinty.
      e.preventDefault();

      // Extract the value of the search input text field.
      var tag = $('input.search-tag').val().trim();

      // Invoke `search`, passing `tag` (unless tag is an empty string).
      if(tag) {
        search(tag);
      };

    });

  }

  function showPhoto(p){
    $(p).fadeIn();
  }

  // Public API
  Instagram.App = {
    search: search,
    showPhoto: showPhoto,
    init: init
  };
}());

$(function(){
  Instagram.App.init();

  // Start with a search on cats; we all love cats.
  Instagram.App.search('cats');  
});

在jsfiddle

上

从图像中获取位置数据（Instagram / JS）

1 个答案: