I would like to modally add a view controller with a transparent background, so the parent view controller beneath can be seen. (This is in an app for iPhone, not for iPad.)
I have been searching for the solution. Now thanks to iOS 8. They has introduced couple of new modalPresentationStyle. one among them is UIModalPresentationOverCurrentContext. Used the same to solve the this issue.
viewcontroller.modalPresentationStyle = UIModalPresentationOverCurrentContext;
Hope this helps.