How can i rerender Pinterest's Pin It button?

问题:

I'm trying to create and manipulate the Pin It button after page load. When i change the button properties with js, it should be rerendered to get the functionality of pinning dynamically loaded images. So, does Pinterest have any method like Facebook's B.XFBML.parse() function?

Thanks...

回答1:

Just add data-pin-build attribute to the SCRIPT tag:

<script defer
  src="//assets.pinterest.com/js/pinit.js"
  data-pin-build="parsePinBtns"></script>

That causes pinit.js to expose its internal build function to the global window object as parsePinBtns function.

Then, you can use it to parse links in the implicit element or all of the links on the page:

// parse the whole page
window.parsePinBtns();

// parse links in #pin-it-buttons element only
window.parsePinBtns(document.getElementById('pin-it-buttons'));

Hint: to show zero count just add data-pin-zero="1" to SCRIPT tag.

回答2:

The best way to do this:

1. Remove the iframe of the Pin It button you want to manipulate
2. Append the html for the new button manipulating it as you wish

3. Realod their script - i.e. using jQuery:

   $.ajax({ url: 'http://assets.pinterest.com/js/pinit.js', dataType: 'script', cache:true});
   

回答3:

To render a pin-it button after a page has loaded you can use:

<a href="..pin it link.." id="mybutton" class="pin-it-button" count-layout="none">
    <img border="0" src="//assets.pinterest.com/images/PinExt.png" width="43" height="21" title="Pin It" />
</a>
<script>
    var element = document.getElementById('mybutton');
    (function(x){ for (var n in x) if (n.indexOf('PIN_')==0) return x[n]; return null; })(window).f.render.buttonPin(element);
</script>

Assuming of course the assets.pinterest.com/js/pinit.js is already loaded on the page. The render object has some other useful methods like buttonBookmark, buttonFollow, ebmedBoard, embedPin, embedUser.

回答4:

I built on Derrek's solution (and fixed undeclared variable issue) to make it possible to dynamically load the pinterest button, so it can't possibly slow down load times. Only tangentially related to the original question but I thought I'd share anyway.

at end of document:

<script type="text/javascript">
addPinterestButton = function (url, media, description) {
    var js, href, html, pinJs;
    pinJs = '//assets.pinterest.com/js/pinit.js';
    //url = escape(url);
    url = encodeURIComponent(url);
    media = encodeURIComponent(media);
    description = encodeURIComponent(description);
    href = 'http://pinterest.com/pin/create/button/?url=' + url + '&media=' + media + '&description=' + description;
    html = '<a href="' + href + '" class="pin-it-button" count-layout="vertical"><img border="0" src="http://assets.pinterest.com/images/PinExt.png" title="Pin It" /></a>';
    $('#pinterestOption').html(html);

    //add pinterest js
    js = document.createElement('script');
    js.src = pinJs;
    js.type = 'text/javascript';
    document.body.appendChild(js);
}
</script>

in document ready function:

addPinterestButton('pageURL', 'img', 'description');//replace with actual data

in your document where you want the pinterest button to appear, just add an element with the id pinterestOption, i.e.

<div id="pinterestOption"></div>

hope that helps someone!

回答5:

Here's what I did.

First I looked at pinit.js, and determined that it replaces specially-marked anchor tags with IFRAMEs. I figured that I could write javascript logic to get the hostname used by the src attribute on the generated iframes.

So, I inserted markup according to the normal recommendations by pinterest, but I put the anchor tag into an invisible div.

<div id='dummy' style='display:none;'>
<a href="http://pinterest.com/pin/create/button/?
    url=http%3A%2F%2Fpage%2Furl
    &media=http%3A%2F%2Fimage%2Furl" 
   class="pin-it-button" count-layout="horizontal"></a>
</div>
<script type="text/javascript" src="//assets.pinterest.com/js/pinit.js">
</script>

Then, immediately after that, I inserted a script to slurp up the hostname for the pinterest CDN, from the injected iframe.

//
// pint-reverse.js
//
// logic to reverse-engineer pinterest buttons.
//
// The standard javascript module from pinterest replaces links to
// http://pinterest.com/create/button with links to some odd-looking
// url based at cloudfront.net. It also normalizes the URLs.
//
// Not sure why they went through all the trouble. It does not work for
// a dynamic page where new links get inserted.  The pint.js code
// assumes a static page, and is designed to run "once" at page creation
// time.
//
// This module spelunks the changes made by that script and
// attempts to replicate it for dynamically-generated buttons.
//

pinterestOptions = {};

(function(obj){

    function spelunkPinterestIframe() {
        var iframes = document.getElementsByTagName('iframe'),
            k = [], iframe, i, L1 = iframes.length, src, split, L2;

        for (i=0; i<L1; i++) {
            k.push(iframes[i]);
        }
        do {
            iframe = k.pop();
            src = iframe.attributes.getNamedItem('src');
            if (src !== null) {
                split = src.value.split('/');
                L2 = split.length;
                obj.host = split[L2 - 2];
                obj.script = split[L2 - 1].split('?')[0];
                //iframe.parentNode.removeChild(iframe);
            }
        } while (k.length>0);
    }

    spelunkPinterestIframe();

}(pinterestOptions));

Then,

function getPinMarkup(photoName, description) {
    var loc = document.location,
        pathParts = loc.pathname.split('/'),
        pageUri = loc.protocol + '//' + loc.hostname + loc.pathname,
        href = '/' + pathToImages + photoName,
        basePath = (pathParts.length == 3)?'/'+pathParts[1]:'',
        mediaUri = loc.protocol+'//'+loc.hostname+basePath+href,
        pinMarkup;

    description = description || null;

    pinMarkup = '<iframe class="pin-it-button" ' + 'scrolling="no" ' +
        'src="//' + pinterestOptions.host + '/' + pinterestOptions.script +
        '?url=' + encodeURIComponent(pageUri) +
        '&media=' + encodeURIComponent(mediaUri);

    if (description === null) {
        description = 'Insert standard description here';
    }
    else {
        description = 'My site - ' + description;
    }

    pinMarkup += '&description=' + encodeURIComponent(description);
    pinMarkup += '&title=' + encodeURIComponent("Pin this " + tagType);
    pinMarkup += '&layout=horizontal&count=1">';
    pinMarkup += '</iframe>';
    return pinMarkup;
}

And then use it from jQuery like this:

    var pinMarkup = getPinMarkup("snap1.jpg", "Something clever here");
    $('#pagePin').empty(); // a div...
    $('#pagePin').append(pinMarkup);

回答6:

I rewrote the Pinterest button code to support the parsing of Pinterest tags after loading AJAX content, similar to FB.XFBML.parse() or gapi.plusone.go(). As a bonus, an alternate JavaScript file in the project supports an HTML5-valid syntax.

Check out the PinterestPlus project at GitHub.

回答7:

Here is what i did.. A slight modification on @Derrick Grigg to make it work on multiple pinterest buttons on the page after an AJAX reload.

refreshPinterestButton = function () {
    var url, media, description, pinJs, href, html, newJS, js;
    var pin_url;
    var pin_buttons = $('div.pin-it a');
    pin_buttons.each(function( index ) {
        pin_url = index.attr('href');
        url = escape(getUrlVars(pin_URL)["url"]);
        media = escape(getUrlVars(pin_URL)["media"]);
        description = escape(getUrlVars(pin_URL)["description"]);
        href = 'http://pinterest.com/pin/create/button/?url=' + url + '&media=' + media + '&description=' + description;
        html = '<a href="' + href + '" class="pin-it-button" count-layout="horizontal"><img border="0" src="http://assets.pinterest.com/images/PinExt.png" title="Pin It" /></a>';
        index.parent().html(html);
    });

    //remove and add pinterest js
    pinJs = '//assets.pinterest.com/js/pinit.js';
    js = $('script[src*="assets.pinterest.com/js/pinit.js"]');
    js.remove();
    js = document.createElement('script');
    js.src = pinJs;
    js.type = 'text/javascript';
    document.body.appendChild(js);
}

});


function getUrlVars(pin_URL)
{
    var vars = [], hash;
    var hashes = pin_URL.slice(pin_URL.indexOf('?') + 1).split('&');
    for(var i = 0; i < hashes.length; i++)
    {
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
    return vars;
}

回答8:

Try reading this post http://dgrigg.com/blog/2012/04/04/dynamic-pinterest-button/ it uses a little javascript to replace the pinterest iframe with a new button and then reloads the pinit.js file. Below is the javascript to do the trick

refreshPinterestButton = function (url, media, description) {
    var js, href, html, pinJs;
    url = escape(url);
    media = escape(media);
    description = escape(description);
    href = 'http://pinterest.com/pin/create/button/?url=' + url + '&media=' + media + '&description=' + description;
    html = '<a href="' + href + '" class="pin-it-button" count-layout="horizontal"><img border="0" src="http://assets.pinterest.com/images/PinExt.png" title="Pin It" /></a>';
    $('div.pin-it').html(html);

    //remove and add pinterest js
    pinJs = $('script[src*="assets.pinterest.com/js/pinit.js"]');
    pinJs.remove();
    js = document.createElement('script');
    js.src = pinJs.attr('src');
    js.type = 'text/javascript';
    document.body.appendChild(js);
}

回答9:

Their pinit.js file, referenced in their "Pin it" button docs, doesn't expose any globals. It runs once and doesn't leave a trace other than the iframe it creates.

You could inject that file again to "parse" new buttons. Their JS looks at all anchor tags when it is run and replaces ones with class="pin-it-button" with their iframe'd button.

回答10:

this works fine for me: http://www.mediadevelopment.no/projects/pinit/ It picks up all data on click event

回答11:

I tried to adapt their code to work the same way (drop in, and forget about it), with the addition that you can make a call to Pinterest.init() to have any "new" buttons on the page (eg. ajax'd in, created dynamically, etc.) turned into the proper button.

Project: https://github.com/onassar/JS-Pinterest Raw: https://raw.github.com/onassar/JS-Pinterest/master/Pinterest.js

回答12:

The official way to do this is by setting the "data-pin-build" attribute when loading the script:

<script defer="defer" src="//assets.pinterest.com/js/pinit.js" data-pin-build="parsePins"></script>

Then you can render your buttons dynamically like so:

// render buttons inside a scoped DOM element
window.parsePins(buttonDomElement);

// render the whole page
window.parsePins();

There is also another method on this site which lets you render them in JavaScript without the script tag.