To go to the home screen at any time, swipe up from the bottom edge of the screen. Do you mean apple's uikit framework on ios, or the open source uikit for developing web interfaces? Note to position content on top of the covering element, use the position component.
Displays an alert message or action sheet to the user, with optional text fields for data entry and action buttons.
For the most part, uikit classes should be used only from an application’s main thread.
This is particularly true for classes derived from uiresponder or that involve manipulating your application’s user interface in any way. To unlock your iphone with face id, glance at your iphone, then swipe up from the bottom of the lock screen. Unlock and get to the home screen. Or if your iphone is on a table or other flat surface, you can raise it or tap it to wake it.
A uiview that displays a dialog message with one or more buttons.
That is what the qt stylesheet is best for, to. (as of ios 8, devs should use uialertcontroller rather than this class.) Getuikit.com if you mean ios uikit, why would you want to diverge from the platform's style?