Get UIWindow

gistfile1.txt

//    - (UIWindow *)frontWindow {
//    #if !defined(SV_APP_EXTENSIONS)
//    NSEnumerator *frontToBackWindows = [UIApplication.sharedApplication.windows reverseObjectEnumerator];
//    for (UIWindow *window in frontToBackWindows) {
//    BOOL windowOnMainScreen = window.screen == UIScreen.mainScreen;
//    BOOL windowIsVisible = !window.hidden && window.alpha > 0;
//    BOOL windowLevelSupported = (window.windowLevel >= UIWindowLevelNormal && window.windowLevel <= self.maxSupportedWindowLevel);
//    BOOL windowKeyWindow = window.isKeyWindow;
//
//    if(windowOnMainScreen && windowIsVisible && windowLevelSupported && windowKeyWindow) {
//    return window;
//    }
//    }
//    #endif
//    return nil;
//    }