这是我在 StackOverflow 上的第一篇文章，我可以说，这是一个多么棒且有用的资源。我已经能够找到许多问题的答案，并希望对这个问题做同样的事情。关于手头的问题......我目前正在使用 instafeed.js ( http://instafeedjs.com/ ) 脚本从 instagram 中提取图像并将它们显示在我的网站上。
我想要完成的是显示 9 个项目，然后如果我点击“下一个”按钮，它将替换当前的 9 个图像并加载接下来的 9 个图像，如果单击“上一个”按钮它会去返回并显示前 9 张图像。
目前它只渲染一个图像缩略图，滚动浏览 9 个图像然后停止。一次只交换一张图像。可以在此处找到仅显示 1 个图像的当前工作代码示例 - http://codepen.io/stevenschobert/pen/iHxfw
这是我用于 instafeed 调用的 JavaScript：
var count = 1;
var feed;
feed = new Instafeed({
clientId: '68be8b63013048ff81bb4ac8b02b606e',
limit: 9,
resolution: 'standard_resolution',
template: '<a href="{{image}}" rel="lightbox"><img src="{{image}}" /><div class="likes">♥ {{likes}}</div></a>',
mock: true,
after: function () {
var images = $("#instafeed").find('a');
$.each(images, function(index, image) {
var delay = (index * 75) + 'ms';
$(image).css('-webkit-animation-delay', delay);
$(image).css('-moz-animation-delay', delay);
$(image).css('-ms-animation-delay', delay);
$(image).css('-o-animation-delay', delay);
$(image).css('animation-delay', delay);
$(image).addClass('animated fadeInUp pic-'+count++);
});
},
custom: {
images: [],
currentImage: 0,
showImage: function () {
var result, image;
image = this.options.custom.images[this.options.custom.currentImage];
result = this._makeTemplate(this.options.template, {
model: image,
id: image.id,
link: image.link,
image: image.images[this.options.resolution].url,
caption: this._getObjectProperty(image, 'caption.text'),
likes: image.likes.count,
comments: image.comments.count,
location: this._getObjectProperty(image, 'location.name')
});
$("#instafeed").html(result);
}
},
success: function (data) {
this.options.custom.images = data.data;
this.options.custom.showImage.call(this);
}
});
feed.run();
$(".next").click(function () {
var length, current;
current = feed.options.custom.currentImage;
length = feed.options.custom.images.length;
if (current < length - 1) {
feed.options.custom.currentImage++;
feed.options.custom.showImage.call(feed);
}
});
$(".prev").click(function () {
var length, current;
current = feed.options.custom.currentImage;
length = feed.options.custom.images.length;
if (current > 0) {
feed.options.custom.currentImage--
feed.options.custom.showImage.call(feed);
}
});
我的 HTML：
<div id="instafeed"></div>
<div class="controls">
<div class="prev"><- prev</div>
<div class="next">next -></div>
</div>
Instafeed.js 代码：
(function() { var Instafeed, root; Instafeed = (function() {
function Instafeed(params) {
var option, value;
this.options = {
target: 'instafeed',
get: 'popular',
resolution: 'thumbnail',
sortBy: 'most-recent',
links: true,
limit: 15,
mock: false
};
if (typeof params === 'object') {
for (option in params) {
value = params[option];
this.options[option] = value;
}
}
this.unique = this._genKey();
}
Instafeed.prototype.run = function() {
var header, instanceName, script;
if (typeof this.options.clientId !== 'string') {
if (typeof this.options.accessToken !== 'string') {
throw new Error("Missing clientId or accessToken.");
}
}
if (typeof this.options.accessToken !== 'string') {
if (typeof this.options.clientId !== 'string') {
throw new Error("Missing clientId or accessToken.");
}
}
if ((this.options.before != null) && typeof this.options.before === 'function') {
this.options.before.call(this);
}
if (typeof document !== "undefined" && document !== null) {
script = document.createElement('script');
script.id = 'instafeed-fetcher';
script.src = this._buildUrl();
header = document.getElementsByTagName('head');
header[0].appendChild(script);
instanceName = "instafeedCache" + this.unique;
window[instanceName] = new Instafeed(this.options);
window[instanceName].unique = this.unique;
}
return true;
};
Instafeed.prototype.parse = function(response) {
var anchor, fragment, header, htmlString, image, imageString, images, img, instanceName, reverse, sortSettings, _i, _j, _len, _len1;
if (typeof response !== 'object') {
if ((this.options.error != null) && typeof this.options.error === 'function') {
this.options.error.call(this, 'Invalid JSON data');
return false;
} else {
throw new Error('Invalid JSON response');
}
}
if (response.meta.code !== 200) {
if ((this.options.error != null) && typeof this.options.error === 'function') {
this.options.error.call(this, response.meta.error_message);
return false;
} else {
throw new Error("Error from Instagram: " + response.meta.error_message);
}
}
if (response.data.length === 0) {
if ((this.options.error != null) && typeof this.options.error === 'function') {
this.options.error.call(this, 'No images were returned from Instagram');
return false;
} else {
throw new Error('No images were returned from Instagram');
}
}
if ((this.options.success != null) && typeof this.options.success === 'function') {
this.options.success.call(this, response);
}
if (this.options.sortBy !== 'most-recent') {
if (this.options.sortBy === 'random') {
sortSettings = ['', 'random'];
} else {
sortSettings = this.options.sortBy.split('-');
}
reverse = sortSettings[0] === 'least' ? true : false;
switch (sortSettings[1]) {
case 'random':
response.data.sort(function() {
return 0.5 - Math.random();
});
break;
case 'recent':
response.data = this._sortBy(response.data, 'created_time', reverse);
break;
case 'liked':
response.data = this._sortBy(response.data, 'likes.count', reverse);
break;
case 'commented':
response.data = this._sortBy(response.data, 'comments.count', reverse);
break;
default:
throw new Error("Invalid option for sortBy: '" + this.options.sortBy + "'.");
}
}
if ((typeof document !== "undefined" && document !== null) && this.options.mock === false) {
document.getElementById(this.options.target).innerHTML = '';
images = response.data;
if (images.length > this.options.limit) {
images = images.slice(0, this.options.limit + 1 || 9e9);
}
if ((this.options.template != null) && typeof this.options.template === 'string') {
htmlString = '';
imageString = '';
for (_i = 0, _len = images.length; _i < _len; _i++) {
image = images[_i];
imageString = this._makeTemplate(this.options.template, {
model: image,
id: image.id,
link: image.link,
image: image.images[this.options.resolution].url,
caption: this._getObjectProperty(image, 'caption.text'),
likes: image.likes.count,
comments: image.comments.count,
location: this._getObjectProperty(image, 'location.name')
});
htmlString += imageString;
}
document.getElementById(this.options.target).innerHTML = htmlString;
} else {
fragment = document.createDocumentFragment();
for (_j = 0, _len1 = images.length; _j < _len1; _j++) {
image = images[_j];
img = document.createElement('img');
img.src = image.images[this.options.resolution].url;
if (this.options.links === true) {
anchor = document.createElement('a');
anchor.href = image.images['standard_resolution'].url;
anchor.rel = "lightbox";
anchor.appendChild(img);
fragment.appendChild(anchor);
} else {
fragment.appendChild(img);
}
}
document.getElementById(this.options.target).appendChild(fragment);
}
header = document.getElementsByTagName('head')[0];
header.removeChild(document.getElementById('instafeed-fetcher'));
instanceName = "instafeedCache" + this.unique;
delete window[instanceName];
}
if ((this.options.after != null) && typeof this.options.after === 'function') {
this.options.after.call(this);
}
return true;
};
Instafeed.prototype._buildUrl = function() {
var base, endpoint, final;
base = "https://api.instagram.com/v1";
switch (this.options.get) {
case "popular":
endpoint = "media/popular";
break;
case "tagged":
if (typeof this.options.tagName !== 'string') {
throw new Error("No tag name specified. Use the 'tagName' option.");
}
endpoint = "tags/" + this.options.tagName + "/media/recent";
break;
case "location":
if (typeof this.options.locationId !== 'number') {
throw new Error("No location specified. Use the 'locationId' option.");
}
endpoint = "locations/" + this.options.locationId + "/media/recent";
break;
case "user":
if (typeof this.options.userId !== 'number') {
throw new Error("No user specified. Use the 'userId' option.");
}
if (typeof this.options.accessToken !== 'string') {
throw new Error("No access token. Use the 'accessToken' option.");
}
endpoint = "users/" + this.options.userId + "/media/recent";
break;
default:
throw new Error("Invalid option for get: '" + this.options.get + "'.");
}
final = "" + base + "/" + endpoint;
if (this.options.accessToken != null) {
final += "?access_token=" + this.options.accessToken;
} else {
final += "?client_id=" + this.options.clientId;
}
final += "&count=" + this.options.limit;
final += "&callback=instafeedCache" + this.unique + ".parse";
return final;
};
Instafeed.prototype._genKey = function() {
var S4;
S4 = function() {
return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
};
return "" + (S4()) + (S4()) + (S4()) + (S4());
};
Instafeed.prototype._makeTemplate = function(template, data) {
var output, pattern, varName, varValue, _ref;
pattern = /(?:\{{2})([\w\[\]\.]+)(?:\}{2})/;
output = template;
while (pattern.test(output)) {
varName = output.match(pattern)[1];
varValue = (_ref = this._getObjectProperty(data, varName)) != null ? _ref : '';
output = output.replace(pattern, "" + varValue);
}
return output;
};
Instafeed.prototype._getObjectProperty = function(object, property) {
var piece, pieces;
property = property.replace(/\[(\w+)\]/g, '.$1');
pieces = property.split('.');
while (pieces.length) {
piece = pieces.shift();
if ((object != null) && piece in object) {
object = object[piece];
} else {
return null;
}
}
return object;
};
Instafeed.prototype._sortBy = function(data, property, reverse) {
var sorter;
sorter = function(a, b) {
var valueA, valueB;
valueA = this._getObjectProperty(a, property);
valueB = this._getObjectProperty(b, property);
if (reverse) {
if (valueA > valueB) {
return 1;
} else {
return -1;
}
}
if (valueA < valueB) {
return 1;
} else {
return -1;
}
};
data.sort(sorter.bind(this));
return data;
};
return Instafeed;})(); root = typeof exports !== "undefined" && exports !== null ? exports : window; root.Instafeed = Instafeed;}).call(this);
任何有关此问题的帮助将不胜感激。
谢谢你，
杰森