displayUpdateGranularity
The number of seconds between the screen’s supported update rates, for screens that support fixed update rates.
Declaration
var displayUpdateGranularity: TimeInterval { get }Discussion
All screen refresh rates fall between the values in the minimumRefreshInterval and maximumRefreshInterval properties. For screens that support fixed update rates, this property contains the amount of time between two successive rates. For example, if a screen supports update rates between 30Hz and 120Hz with an update granularity of 5ms, the screen supports additional refresh rates of approximately 35Hz, 43Hz, 55Hz, and 75Hz.
If the value of this property is 0, the screen supports any update rate between the minimum and maximum refresh intervals.