Apply a "tutorial screen" overlay to your application window. MDCFocusView can apply a focus on an arbitrary number of views, and prevents users from tapping views not currently focused on.

MDCFocusView from modocache on Vimeo.

How to Use

You can install the project using Cocoapods, by placing pod MDCFocusView in your Podfile. After installing:

// Initialize MDCFocusView and customize its background color
MDCFocusView *focusView = [MDCFocusView new];
focusView.backgroundColor = [UIColor colorWithRed:0.0f green:0.0f blue:0.0f alpha:0.8f];

// Register a MDCFocalPointView subclass to "wrap" focal points
focusView.focalPointViewClass = [MDCSpotlightView class];

// Add any number of custom views to MDCFocusView
[focusView addSubview:[self buildLabel]];

// Present the focus view
[self.focusView focus:someView, anotherView, nil];

Please see the sample app for an example.

Features

• Because MDCFocusView uses MDCFocalPointView to wrap focal points, it is highly extensible--to create your own focus effect, simply subclass MDCFocalPointView and implement any custom drawing behavior in drawRect:. Please see MDCSpotlightView for an example.

Limitations (or Ways to Contribute to this Project)

• Currently MDCFocusView can only be applied to the entire application window. Ideally, any arbirary view should be able to add MDCFocusView as a subview.
• Currently only MDCFocalPointView and MDCSpotlightView are available, although I would like to make more. It would be nice, for example, if a Gaussian blur could be applied everywhere but the focal points.
• See the GitHub issues for more bugs/feature requests you can help with.