iOS: Custom Font Robot-Bold (not working)

Sometimes when you add a ttf file to an XCode project it will not be added to your target. This means that it will not be included in the compiled app bundle.

Select the font file in XCodes Project Navigator, then open the file inspector Utilities pane (Cmd-Option-0). You should see a "Target Membership" group there and the target of your project should have the checkbox checked. If it isn't check that and try again.

If you did all above and still doesn't work. One more XCODE bug that can cause that - If you never used this custom font on storyboard/xib - add an hidden label with this font(from Interface Builder) and then suddenly it will recognise it programmatically...

-Xcode 7.3.1 - still have this bug