Cannot show modal ViewController in iOS7

Question

I tried to show system defined viewcontrollers (MFMailComposeViewController, TWTweetComposeViewController,etc..) as a modal view.

But these viewcontrollers dosn\'t a

Answer 1

I had the same error when use SLComposeViewController to share with Facebook or Twitter using the simulator of 64-Bits or an iPhone 5s, then i delete every line of code that use "appearance, for example [UITableViewCell appearance] or [UIBarButtonItem appearance], and every run ok.