UI Privacy API

Method	Returns	Description
preventScreenshot(prevent)	Promise<void>	Toggle screenshot/recording prevention and background blur

preventScreenshot(prevent)

preventScreenshot(prevent: boolean): Promise<void>

Parameters:

• prevent — true to enable protection, false to disable

Android: sets or clears FLAG_SECURE on the window, blocking screenshots and screen recording at the OS level.

iOS: applies a UITextField.secureTextEntry layer trick to mask screen recording and AirPlay mirroring, and injects a blur overlay on WillResignActive to hide content in the app switcher. Hardware screenshots (Home + Power) cannot be blocked.