特定のタグから写真を取得しようとしています。すばらしいチュートリアルを見つけて、ページネーションを使って Instagram から写真を引き出すことができました。
私が今直面している問題は、写真の最後まで表示されると重複した写真が表示されることです。
HTML ソース
<!DOCTYPE html>
<html>
<head>
<script src='http://code.jquery.com/jquery-1.7.2.min.js' type='text/javascript' charset='utf-8'></script>
<script src='javascripts/application.js' type='text/javascript' charset='utf-8'></script>
<link rel='stylesheet' href='stylesheets/application.css' type='text/css' media='screen'>
<title>Photo Stream </title>
<meta name="description" content="Search for instagram images online.">
<meta name="author" content="Omar Sahyoun">
</head>
<body>
<!--<form id='search'>
<button class="button" type="submit" id="search-button" dir="ltr" tabindex="2">
<span class="button-content">Search</span>
</button>
<div class='search-wrap'>
<input class='search-tag' type='text' tabindex='1' value='cats' />
</div>
</form>-->
<h2 id="search">Photo Stream </h2>
<div id='photos-wrap'>
</div>
<div class='paginate'>
<a class='button' style='display:none;' data-max-tag-id='' href='#'>View More...</a>
</div>
</body>
</html>
Javascript ファイル
// Add trim function support for IE7/IE8
if(typeof String.prototype.trim !== 'function') {
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g, '');
}
}
// Instantiate an empty object.
var Instagram = {};
// Small object for holding important configuration data.
Instagram.Config = {
clientID: 'xxxx',
apiHost: 'https://api.instagram.com'
};
// Quick and dirty templating solution.
Instagram.Template = {};
Instagram.Template.Views = {
"photo": "<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>" +
"<span class='heart'><strong>{count}</strong></span><span class='comment'><strong>{count2}</strong></span>" +
"<span class='avatar'><iframe src='//www.facebook.com/plugins/like.php?href={url}&send=false&layout=button_count&width=40&show_faces=true&action=like&colorscheme=light&font&height=21&' scrolling='no' frameborder='0' style='border:none; overflow:hidden; width:80px; height:21px;' allowTransparency='true'></iframe></span>" +
"</div>"
};
Instagram.Template.generate = function(template, data){
var re, resource;
template = Instagram.Template.Views[template];
for(var attribute in data){
re = new RegExp("{" + attribute + "}","g");
template = template.replace(re, data[attribute]);
}
return template;
};
// ************************
// ** Main Application Code
// ************************
(function(){
function init(){
bindEventHandlers();
}
function toTemplate(photo){
photo = {
count: photo.likes.count,
count2: photo.comments.count,
avatar: photo.user.profile_picture,
photo: photo.images.low_resolution.url,
url: photo.link
};
return Instagram.Template.generate('photo', 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=?&count=10&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.button', function(){
var tagID = $(this).attr('data-max-tag-id');
fetchPhotos(tagID);
return false;
});
// Bind an event handler to the `click` event on the form's button
$('form#search button').click(function(){
// Extract the value of the search input text field.
var tag = $('input.search-tag').val();
// Invoke `search`, passing `tag`.
search(tag);
// Stop event propagation.
return false;
});
}
function showPhoto(p){
$(p).fadeIn();
}
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('hwplus');
});
写真が最後に達した場合に「もっと見る」ボタンを無効にする方法を見つけてください。また、JSON オブジェクトにキャッシュを追加し、Javascript から変数をフェッチする方法はありますか?
感謝します。