Using the sample app at https://developer.apple.com/library/ios/referencelibrary/GettingStarted/DevelopiOSAppsSwift/Lesson4.html#//apple_ref/doc/uid/TP40015214-CH6-SW1
iOS 9 simulator prompts for Photo authorization. Building the same app in iOS 10, making affordances for the updated API, crashes immediately upon tapping the imageView gesture recognizer (to present uiimagepicker).
I am never prompted for Photo Access authorizaiton. Further inspection shows that the authorization status is returning 'not determined'.