问题
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?
回答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.
回答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) ?
来源：https://stackoverflow.com/questions/9465712/ios-screen-mirroring-shows-overscan-borders-on-selected-apps