Presenting a view controller with transparency and animation

Question

I\'m setting self.window.rootViewController.modalPresentationStyle = UIModalPresentationCurrentContext; in my Application Delegate so that I can present a view

Answer 1

I ended up doing this:

AppDelegate *appDelegate = [AppDelegate sharedAppDelegate];

// Set the root VC modal presentation style
appDelegate.window.rootViewController.modalPresentationStyle = UIModalPresentationCurrentContext;

WalkthroughViewController *walkthroughVC = [[WalkthroughViewController alloc] initWithNibName:nil bundle:nil];

[self presentViewController:walkthroughVC animated:NO completion:nil];

// Manually animate the view
walkthroughVC.view.alpha = 0;
[UIView animateWithDuration:0.5 animations:^{
       walkthroughVC.view.alpha = 1;
}];

// Reset root VC modal presentation style 
appDelegate.window.rootViewController.modalPresentationStyle = UIModalPresentationFullScreen;

Answer 2

You could use a containment view that exists in the base view controller. Instead of presenting a modal, animate the positioning of the containment view up to simulate a modal presentation.

For example...

TransparentViewController *viewController = [[TransparentViewController alloc] init];
viewController.view.frame = CGRectMake(0, 480, 320, 480);
self.containmnetView = viewController.view;

To present do this:

[UIView animateWithDuration:0.5f animations:^{
    self.containmentView.frame = CGRectMake(0, 0, 320, 480);
}];

I hope this helps.