Q:

iOS - Facebook SDK v3.24.1 Login Screen is Blank except when using FBSessionLoginBehaviorForcingWebView

I am trying to update my app to use the iOS 9 compatible Facebook SDK v3.24.1. We have not upgrade to v4.x yet, and can not do that just yet so I need to use v3.24.1. I have followed this Facebook Migration Guide: developers.facebook.com/docs/ios/ios9
I have added all the appropriate Facebook settings to my .plist file (i.e. CFBundleURLSchemes, FacebookAppID, FacebookDisplayName, etc).
I have also updated the .plist for the iOS 9 requirements:
<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

I have updated the framework files and modified the Facebook login method to now use:
[[FBSession activeSession] openWithBehavior:FBSessionLoginBehaviorWithFallbackToWebView fromViewController:fromViewController completionHandler:handler];

The problem I have is that if I try to use any of the 'behaviors' other than 'FBSessionLoginBehaviorForcingWebView', all I get is a blank white modal screen (below). I really need to allow the app to attempt to authenticate using the iOS Native Facebook Settings or Facebook App before falling back to a web view.
Any suggestions?

Using 'FBSessionLoginBehaviorForcingWebView' does give me the proper web view modal:

A:

This is a bug in Apple's SafariViewController.
When you use a UIImageRenderingModeAlwaysTemplate UIImage in [UIBarButtonItem appearance] setBackgroundImage: and try to display a SFSafariViewController, you'll only get a blank page.
UIImage *image = [[UIImage imageNamed:@"someimage"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[[UIBarButtonItem appearance] setBackgroundImage:image forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

Using normal UIImage will display SFSafariViewController.

