No Title or Cancel Button for MFMessageComposeViewController

问题

I'm trying to present a MFMessageComposeViewController from a UIActivityViewController. However, when I select to share using a Message I see this

let activityVC = UIActivityViewController(activityItems: ["text"], applicationActivities: nil)
self.presentViewController(activityVC, animated: true, completion: nil)

I customized my navigation bar appearance in my AppDelegate

UINavigationBar.appearance().barTintColor = UIColor.blackColor()
UINavigationBar.appearance().tintColor = UIColor.whiteColor()

Anyone know how to fix this? Using Mail does not have this problem

来源：https://stackoverflow.com/questions/38356237/no-title-or-cancel-button-for-mfmessagecomposeviewcontroller