UIActivityViewController (Part 2): Building a custom UIActivity ("Open In...") in Swift on July 15, 2015 "Open In" popover UIActivity UIActivityViewController UIDocumentInteractionController UIPopoverPresentationController +
iOS code for saving "Open In" file to Documents directory (and resolving duplicate filenames) on April 03, 2014 "Open In" AppDelegate duplicate filenames NSURL +
Easiest way to zip and unzip files in your iOS app (Xcode) on March 03, 2014 "Open In" iOS libz.dylib NSFileManager SSZipArchive UTI Xcode ZipArchive +
Two ways to open a file sent to your app (Xcode/iOS) on March 02, 2014 "Open In" application:openURL:sourceApplication:annotation: application:willFinishLaunchingWithOptions: iOS NSURL Xcode +
Open a file in another app using a UIDocumentInteractionController (Xcode/iOS) on March 02, 2014 "Open In" iOS UIDocumentInteractionController Xcode +
Enable your iOS app to share files via iTunes and to open files sent from other apps ('Open In') on January 06, 2014 "Open In" Document Interaction iOS iTunes Sharing UIDocumentInteractionController unique type identifier UTI Xcode +