QLPreviewController's view

Question

I just trying to get to QLPreviewController.view. Indeed, I want to catch a tap event on its view to show/hide toolbar etc. I am trying:

QLPreviewController* qlpc = [QLPreviewController new];
    qlpc.delegate = self;
    qlpc.dataSource = self;
    qlpc.currentPreviewItemIndex=qlIndex;
    [navigator pushViewController:qlpc animated:YES];
    qlpc.title = [path lastPathComponent];
    [qlpc setToolbarItems:[NSArray arrayWithObjects:self.dirBrowserButton,self.space, self.editButton, self.btnSend, nil] animated:YES];
    UITapGestureRecognizer* gestTap  = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showControls:)];
    gestTap.cancelsTouchesInView=NO;
    [qlpc.view addGestureRecognizer:[gestTap autorelease]];
    [qlpc release];

And nothing happens

If I attach UITapRecognizer onto navigationController.view, it fires only if I touch toolbar/navbar. UISwipeGestureRecognizer works fine in that case.

I tried to attach a transparent overlay view and add gesture recognizers on it, but no luck. Well, I saw some apps that implements such a feature so obviously it is possible, but how? Sorry, I googled all day long and didn't find any solution. Please, help me.

Answer 1

With your solution, does the QLPreviewController's view still recieve touches? I've tried to do something similar (I'm stealing the view from QLPreviewController to use it) and it looks like my overlay view doesn't let anything pass trough to the view lying behind it.