UI doesn't fill in iPhone 6 plus
问题 I'm working on an iOS app and realize the ui is not auto stretch to fit the screen when it's running in iPhone 6 plus. So the UI is on the right left, and there are a lot of white space in the bottom and right. If I set the width of a view to beyond 320 (ex. 400), then the view be wider than 320. How could I make my views auto stretch to fill the screen? I have a few other apps, and they works perfectly fine in iPhone 6 plus. I couldn't figure out what make this app's ui not auto stretching.