Hello, it's been quite a while since I did an iOS app. right now I use xCode 10.1 I follow this tutorial https://medium.com/@rizwanm/https-medium-com-rizwanm-swift-camera-part-1-c38b8b773b2. One of the most annoyiny things in xcode is linking the buton. In step 2 of the tutorial, it says " Control + drag our preview vie to ViewController.swift and create an IBOutlet named previewView". How do I do that? It seems no matter how I control drag, it never create an IBOutlet.