cordova-plugin-facebook-connect/docs/TROUBLESHOOTING.md

Cordova Facebook SDK Plugin

# Troubleshooting

Can't solve your issue here? Check the [existing issues](https://github.com/cordova-plugin-facebook-connect/cordova-plugin-facebook-connect/issues) on Github. If you still cannot find a solution please [create and issue after reading the contributing guide](../CONTRIBUTING.md). 

When creating a Github issue **remember to**:

- List your platform!
- Provide sample code
- Provide a log (Xcode console or adb logcat)

### Troubleshooting contents
- [**General**](#general)
	- [How do I Add a Like Button?](#how-do-i-add-a-like-button)
	- [Where is the init API?](#where-is-the-init-api)

- [**Android**](#android)
	- [No Reply From Login?](#no-reply-from-login)
	- [Facebook error: Session was closed and was not closed normally](#facebook-error-session-was-closed-and-was-not-closed-normally)
	- [My Hash Does Not Work, I am Using Windows](#my-hash-does-not-work-i-am-using-windows)
	- [Jar mismatch! Fix your dependencies](#jar-mismatch-fix-your-dependencies)
	- [Open Fullscreen Dialog in Landscape Orientation](#open-fullscreen-dialog-in-landscape-orientation)

- [**iOS**](#ios)
	- [Missing FacebookConnectPlugin](#missing-facebookconnectplugin)
	- [Login Always Opens Web Dialog Even Though Native App is Installed](#login-always-opens-web-dialog-even-though-native-app-is-installed)
    - [Login fails with devices running iOS 10+](#login-fails-with-devices-running-ios-10)

## General
### How do I Add a Like Button?

- Problem
    - I am trying to implement like button functionality in my app. Whenever user likes my facebook page, user will get rewards. So i have tried to implement this like button functionality as described here:
[https://developers.facebook.com/docs/plugins/like-button](https://developers.facebook.com/docs/plugins/like-button)

- Solution
    - It won't work for native apps because: [https://developers.facebook.com/docs/ios/like-button/](https://developers.facebook.com/docs/ios/like-button/) is not supported yet. **HOWEVER**; it can be done with the graph API [http://stackoverflow.com/questions/11915269/built-in-like-button-facebook-sdk-3-0](http://stackoverflow.com/questions/11915269/built-in-like-button-facebook-sdk-3-0)
    Things you have to take care of are :

    1. Your like button must not be the same (graphically) as the Facebook like button

    2. When you display your page / button you have to call the getLoginStatus method first to know if the current user is connected to its Facebook account. If he is connected then call `GET` [https://graph.facebook.com/me/og.likes?access_token=FB_ACCESS_TOKEN&object=URL_TO_LIKE](https://graph.facebook.com/me/og.likes?access_token=FB_ACCESS_TOKEN&object=URL_TO_LIKE) with the Facebook Access Token returned by the g3. etAccessToken method (if this returns data then style your like button with a red heart for example, a grey heart if the call returns an empty array).

    3. To create a like (when your user clicks on your like button and your like button is a grey heart) do a POST on [https://graph.facebook.com/me/og.likes?access_token=FB_ACCESS_TOKEN&object=URL_TO_LIKE](https://graph.facebook.com/me/og.likes?access_token=FB_ACCESS_TOKEN&object=URL_TO_LIKE)

    4. To remove a like (when your user clicks on your like button and your like button is a red heart) do a `DELETE` on [https://graph.facebook.com/LIKE_IDENTIFIER?access_token=FB_ACCESS_TOKEN](https://graph.facebook.com/LIKE_IDENTIFIER?access_token=FB_ACCESS_TOKEN). The `LIKE_IDENTIFIER` is returned from steps 2 or 3.

The better way to understand this little "workflow" is to manipulate the Graph API on the og.likes endpoint using the [Facebook Graph Explorer](https://developers.facebook.com/tools/explorer) tool.

### Where is the init API?

- Problem
    - I was using `FB.init()` and now it's not working.

- Solution
    - You are using an out-dated API. Please check the [new API with sample code](https://github.com/cordova-plugin-facebook-connect/cordova-plugin-facebook-connect/blob/master/README.md) and sample projects in `platforms/ios` and `platforms/android`.

## Android
### No Reply From Login?

- Problem
    - **facebookConnectPlugin.login doesn't call neither success nor faillure methods.** - When I'm disconnected from Facebook and don't have the native app, the iframe fallback is blank. Checking on chrome inspector, the elements are set to display: none.

- Solution
    - Copy and paste the following code to print your hash. Add the hash to your Facebook Developer Dashboard.

```
try {
  PackageInfo info =
  cordova.getActivity().getPackageManager().getPackageInfo("com.goapes.golearn", PackageManager.GET_SIGNATURES);

  for (Signature signature : info.signatures) {
      MessageDigest md = MessageDigest.getInstance("SHA");
      md.update(signature.toByteArray());
      Log.e("MY KEY HASH:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
  }

} catch (NameNotFoundException e) {

} catch (NoSuchAlgorithmException e) {

}
```

### Facebook error: Session was closed and was not closed normally

- Problem
    - Receiving the above error and no return from login.

- Solution
    - Your hash is wrong or not updated see [No Reply From Login?](#no-reply-from-login)

### My Hash Does Not Work, I am Using Windows

- Problem
    - Windows users have to be careful about openssl-for-windows [http://code.google.com/p/openssl-for-windows/downloads/list](http://code.google.com/p/openssl-for-windows/downloads/list), the latest version, at least on plataform 64bit, does not generate the correct hash that Facebook needs for android apps.

- Solution
    - Use one of these versions when creating your hash: **openssl-0.9.8e_X64.zip** or **openssl-0.9.8d_X64.rar**

You should **not** use the openssl-0.9.8k_X64.zip.

### Open Fullscreen Dialog in Landscape Orientation
- Problem:
    - In landscape orientation the dialog is too small to use keyboard input

- Solution:
    - One can force the dialog to be displayed fullscreen, providing additional screen space for the dialog

Add this import to `facebookConnectPlugin.java`

`import android.content.res.Configuration;`

Change the feed dialog from:

```
WebDialog feedDialog = (new WebDialog.FeedDialogBuilder(me.cordova.getActivity(), Session.getActiveSession(), paramBundle)).setOnCompleteListener(dialogCallback).build();
feedDialog.show();
```

to

```
WebDialog.FeedDialogBuilder feedDialog = (new WebDialog.FeedDialogBuilder(me.cordova.getActivity(), Session.getActiveSession(), paramBundle)).setOnCompleteListener(dialogCallback);
if (cordova.getActivity().getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
	feedDialog.setTheme(android.R.style.Theme_Wallpaper_NoTitleBar_Fullscreen);
}
feedDialog.build().show();
```

Change the feed dialog from:

```
WebDialog requestsDialog = (new WebDialog.RequestsDialogBuilder(me.cordova.getActivity(), Session.getActiveSession(), paramBundle)).setOnCompleteListener(dialogCallback)
	.build();
requestsDialog.show();
```

to

```
WebDialog.RequestsDialogBuilder requestsDialog = (new WebDialog.RequestsDialogBuilder(me.cordova.getActivity(), Session.getActiveSession(), paramBundle)).setOnCompleteListener(dialogCallback);
if (cordova.getActivity().getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
	requestsDialog.setTheme(android.R.style.Theme_Wallpaper_NoTitleBar_Fullscreen);
}
requestsDialog.build().show();
```

## iOS
### Missing FacebookConnectPlugin
- Problem:
	- `CDVPlugin class FacebookConnectPlugin (pluginName: facebookconnectplugin) does not exist.`
- Solution:
	1. Open up Xcode
	2. Go to "Build Phases"
	3. Ensure that the following file is added under "Compile Sources":
		- `FacebookConnectPlugin.m`
	4. Ensure that the following is added under "Link Binary With Libraris":
		- `FacebookSDK.framework`
		- `libsqlite3.dylib`
		- `Social.framework`
		- `Accounts.framework`
		- `Security.framework`

Cordova and plugman seems to have some problems adding frameworks etc. when re-installing/upgrading plugins.


### Login Always Opens Web Dialog Even Though Native App is Installed
- Problem:
	- Calling the login function always opens the web dialog even though the native app is installed on the device.
- Solution:
	- Switch "deep linking" to ON in the Facebook developer website settings for your application

### Login fails with devices running iOS 10
- problem:
    - even if login works properly with older iOS versions, on iOS 10+, error callback is always called
- Solution:
    - Give the iOS application access to the Keychain Sharing capability before building it as instructed in
    [http://stackoverflow.com/questions/38689631/how-to-use-facebook-ios-sdk-on-ios-10](http://stackoverflow.com/questions/38689631/how-to-use-facebook-ios-sdk-on-ios-10).