问题
We are having an issue with the Facebook like button not showing/displaying, on this page:
http://powertextblog.esvelte.net/
It appears that the span and iframe that are generated have an inline style of width:0px and height:0px , I have tried overriding this to no avail.
The button is not showing in any browser.
This is the code we're using on the page (from AddThis) to generate the button.
<a class="addthis_button_facebook_like" fb:like:layout="button_count" addthis:url="http://www.facebook.com/PowerText"></a>
I also tried inserting the Facebook like button using Facebook's own button generator, but the same problem occurs (which would indicate its not an AddThis issue)
Any help would be appreciated.
回答1:
I had the same problem, tried everything until I figured out that was something really stupid. If your facebook page has any restriction, like Country restrictions or Age restrictions, facebook does not show the like button if you are not logged in.
回答2:
I think it is a Facebook bug causing the issue.
Removing the defined URL addthis:url="http://www.facebook.com/PowerText" and using the site domain instead, fixed the issue.
So I think there is some sort of FB bug where defining the URL as a Facebook page causes it to not display, as it works fine without it.
回答3:
Try this facebook like code it should be work.
<a class="addthis_button_facebook_like" fb:like:layout="button_count" fb:like:action="recommend" fb:like:width="135"></a>
回答4:
Had the same problem yesterday. I then played around with the widget on https://developers.facebook.com/docs/plugins/like-button a while. Turned out this only happened with Facebook Page URLs (the URL to like). Even https://facebook.com/facebook itself didn't work correctly anymore. Simply rendered with 0px. All other URL worked as expected. Tried to reach FB on Twitter and they sent this link to the filed issue. Which says bug is known and fixed now.
So we simply had to wait. After one night the next morning all Like buttons with Facebook Page URLs rendered correctly again.
来源：https://stackoverflow.com/questions/14935287/facebook-like-button-not-displaying-showing-in-any-browser