iOS screen mirroring shows overscan borders on selected apps

Question

Problem: iPhone screen mirroring & a dedicated external view of my app show an inch of a black border on all sides.

But: Some views display perfect without black borders on the full-screen, e.g., the Apple TV menu and the photo app.

Tried already - with no effect:

• Disabled overscan on 1080p HD TV ("Disable 16:9 overscan") ( iPad Mirroring using 2 screens, does it support 1080 resolution? )
• set UIScreenOverscanCompensation - has no effect ( IOS - External (hdmi) output fills only half the screen except when coding view manually )

Setup: iPhone 4S (5.0.1), Apple TV 2nd generation (4.4.4)

Any suggestions what I could try additionally?

Pathos

Answer 1

Ran into the same issue and it took a while to find the 'solution'. Turns out you can set the overscanCompensation to '3' and it will remove the borders.

I think Apple just left out the documentation & enum for UIScreenOverscanCompensationNone, but that down in the code they check for it.

Mullock

(y) Worked for me! Thanks! Indeed when I go back to the app chooser, the apple tv snaps down to "safe scan" area again, and snaps big again when my app is again forward. +1. – Irresolute

Setting overscanCompensation fixed the issue to an extend, but still the black borders appears when app goes to background and coming back active . My App is playing a a video in MPMovieplayer. I can reproduce the issue usually when I access some other apps (skype,notes etc) while my App in background. – Jasisa

Answer 2

If you also have black borders during AirPlay Mirroring the answer Of MobileVet won't solve that. Try changing the following setting on your Apple TV: Settings > Audio & Video > Adjust For AirPlay Overscan. Set it to Off (default On).

And btw: doesn't 3 just mean UIScreenOverscanCompensationInsetBounds | UIScreenOverscanCompensationApplicationFrame (1 + 2) ?

Restriction

Answer 3

Due to changes in iOS 13 for displaying content on a connected screen, I had to set screen.overscanCompensation = .scale after we find the connected window scene. I noticed this after I got a message in the console, if you try to set it directly in the .UIScreenDidConnect notification.

Repentant