问题
I am having the bellow described problem with getting UISplitViewController to work on xCode 7.1.1, iOS 9.1. I have implemented the Split VC with both master and detail being a navigation controller. I have a list of tasks and then a detail task view, also a 'add new task' VC. Everything works fine on iPhone, however when I try to run on iPad (any version) or iPhone 6+/6S+, I get the following issue. Initially when I select a task from Master VC, it will load in the same Master VC with a weird grey border. Then when trying to add a new task, screen would also load in the Master VC. Any ideas what I might have done wrong? Just to clarify, I have compared my project to Apple's 'Master-Detail' template a few times and read around the internet for 2 days now... to no avail.
Here are images of what happens on iPad:
App with weird grey border when detail view is loaded within the master view
Add new item VC opening within Master VC
Maybe I am doing something wrong, or have adopted some misconception about how Split View Controller works, can anyone shed some light on this? Thank you in advance!
来源：https://stackoverflow.com/questions/33869182/ios-swift-2-uisplitviewcontroller-opens-detail-screen-on-masters-place-when-on