![]() Apps that adopt the scene lifecycle use different roles for internal and external windows and the screen added/removed notifications discussed in this article are no longer used. It was written before the scene lifecycle and support for multiple windows on iPad were introduced in iOS 13. The information in this section is obsolete. ![]() Should you add support to your own apps? What might you want to display? What code is required? Supporting External Displays - Pre iOS 13 With the new devices (and a new USB-C Digital AV Multiport Adapter), there seems to be a renewed interest in external displays. Sure enough, Apple’s October 2018 event introduced the 11" and 3rd generation 12.9" iPad Pros with a USB-C connector instead of Lightning. This strongly suggested a future device with USB-C, which does have the bandwidth for such a large resolution. The iOS 12.1 simulator had a new 3840×2160 (4K) option which, he noted, couldn’t be supported over an existing Lightning connection. Steve Troughton-Smith found a huge clue in Xcode 10.1 beta. Why the sudden push from Apple to support external screens? Session 233 at WWDC 2018, Adding Delight to your iOS App, discusses this feature first. ![]() For example, a portrait iPhone X is tall and thin with huge black borders to the left and right when viewed on a landscape 16:9 external display.Īpps have been able to detect the presence of an external display and provide a custom, screen-filling, user interface since iOS 3.2. ![]() This will be letter-boxed or pillar-boxed to fill the display without changing the aspect ratio. By default, an external display simply mirrors the contents of the iOS device. The Screen Mirroring feature in Control Centre effectively simulates connection to an external display using AirPlay to stream compressed video to an Apple TV. External Display Support on iOS IntroductionĪpple has provided support for connecting external displays to iOS devices for many years with their Lightning Digital AV Adapter. ![]()
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