I have a WKWebView that navigates to facebook, instagram. Is there any way to detect whether a photo was pressed within the webView and to download the picture and present it in a modal view controller?
You need to add a user script to the webview that handles long press on images. User scripts are JavaScript code that runs at the time of your choosing. Using these scripts, you can, using a specific Apple API, pass data to your native code and do what you want.
I am working on an app for iOS. I am using the facebook multi-friend request dialog. I am using it in the touch display mode, and it's being loaded in a UIWebView.
When the dialog loads, the first friend in the list is always highligted, even after I select some friends. This makes it look wrong when selecting users.
Is there a way to change this behavoir, so that no friend cell is highlighted until you tap on the cell?
I have disable scroll in my app, so there is only scroll from facebook - it looks cute and I like it, but if came to my app directly on site, there is also no scroll bar. I tried to detect if user load page with url http://mysite.com or http://apps.facebook.com/myapps, in both ways I get the same direct address link, so I cant detect if user view my app via facebook and I need to hide scrollbar or view it on site and I need to show scrollbar. So is there a way to detect how user view my app?
What server side language are you using? If you are inside the facebook iframe, your page will be requested with a post variable set called signed_request. You can check if that has been set in your code, if it has you know you are inside the facebook iframe, if it's not then you are on your site. From here you could either conditionally change your css to allow the content to overflow properly and get scrollbars, or redirect them into the facebook app.
I have created a custom Facebook like button.
How do make it that when I click the button, it will trigger the like button provided by Facebook like the one below?
According to facebook policy on Social Plugins point 4 states:
"Don’t obscure or cover elements of social plugins."
You can't change the image directly because it's provided by Facebook.
The Facebook button is in an iFrame with a source that is on a different domain, Facebook’s domain, and so you can't change the button as it's protected by the same-origin policy.
Also, Facebook’s policy prohibits changing their buttons and logos when using embedded content from Facebook, like social buttons.
So, you're not suppose to be able to change the FB buttons, and even if you could it would be against the Facebook Terms of Service.
But... if you still want to do it, you can use the native Facebook button and lay your own image on top or below the Facebook button to fake a custom button.
Laying your image on top is only possible if you use CSS3 pointer-events, wich will make your image click-through and the click event will work "through" your image and actually click the Facebook button.
This only works in newer browsers that support Pointer Events.
Another option is to lay the image behind the FB button and set the FB button's opacity to zero.
I have used this several times myself, and with a little digging around in the Facebook code you can attach hover events and everything else to make it look like a custom button. You would have to find what elements to set opacity : 0 on.
Have never spent any time trying to figure out how to make the unlike function of the original button work on a custom button, but it's probably possible.
All my attempts to actually trigger the FB button with javascript or jQuery trigger() have failed, but maybe someone else has figured out how to do it?
When you create a html element with fb-like class, facebook javascript SDK convert it with a like button when document loaded. You can make a custom element and trigger click event of like button when user click your custom button.
For example :
<input type="button" id="mycustombutton" value="Like">
<div style="display:none" class="fb-like" data-send="false" data-layout="button_count" data-width="450" data-show-faces="false"></div>
jQuery code:
$("#mycustombutton").click(function(){
$(".fb-like").find("a.connect_widget_like_button").click();
// You can look elements in facebook like button with firebug or developer tools.
});
Update
Facebook SDK has been creating like button in an iframe and browsers not allowing to intervention to the iframe in the page. I think add event listener to element in iframe does not possible anymore.
This is not allowed for the obvious reason that it would lead to fraud. Imagine if each time you clicked an image on the web you don't know if it's an actual image or if it will result in a like and show up in your FB feed. It would be disastrous.
If you do want to do this legitimately, you will need to create an app and have the user authorise the app when he visits your site. This will open a popup where the user agreed to let the app access his FB account. Once that is done you can then send the like request on behalf of the user via a server-side script. In other words, it's not worth the effort.
If on the other hand you just want to get the like count for a page and display it however you want, you can do so via a request to "http://graph.facebook.com/#{url}" which will return a JSON payload with the number of likes. In jQuery it would be:
$.getJSON("http://graph.facebook.com/#{url}", function(data) { alert(data.shares); });
I think that facebook goes through great lengths to make sure people can't trigger the "Like" button. This is to prevent scripts from automatically clicking the "Like" button when someone visits the site.
You may be able to override the style of it using CSS and have your image show instead.
You can overlay your button on top of the Facebook like button and use css to hide the Facebook button.
Not sure on the legalities of this however.
You could try to trigger an Ajax request like this
FB.api(
'me/og.likes',
'post',
{
object: "http://samples.ogp.me/226075010839791"
},
function(response) {
// handle the response
}
);
https://developers.facebook.com/docs/reference/opengraph/action-type/og.likes
http://sharingbuttons.io/ allows to make social media share buttons with no javascript at all (Not a like button like in the question…). For Facebook, it just uses a link like this:
<a href="https://facebook.com/sharer/sharer.php?u=http%3A%2F%2Fsharingbuttons.io"
target="_blank" aria-label="Share on Facebook">Share on Facebook </a><br>Here on Stackoverflow, you have to cmd + click to open the link in a new window.
Customize it with your own CSS and, to mimic the share button, just open the url in a popup instead of a target="_blank".
With a Facebook iframe canvas app, is there any way to launch a modal pop-up (such as when clicking to magnify a photo, similar to http://fancybox.net/) that extends outside the bounds of the iframe's width? I'm thinking there would have to be some sort of communication with the _parent, but I'm not sure what's allowed or how to approach this.
In short, you can't.
Your application lives within an iframe within Facebook. You can't alter Facebook's code outside the frame (against their policy).
You can pop up a new browser window in full screen, if you'd like. But I'd question that as far as user experience goes.