Why is the top layout guide moving in my iMessage extension
问题 I have an iMessage extension and I'm having some issues with the top layout guide. I have an MSMessagesAppViewController that handles changes between presentation styles. In my extension I have a button. When it is clicked I transition to expanded presentation style and then present a view controller modally. Here's the problem: my UI in the second VC is getting hidden behind the top navigation bar. I thought this was strange as I set my constraints to the top layout guide. So I dug through