v69.0.0

This major release introduces a breaking change with Snackbar's default style. It also includes
a new top handle and performance improvements for NavigationDrawer.

Breaking changes

usesLegacySnackbar is now NO by default.

New features

MDCBottomNavigationBar has a new elevation property.

NavigationDrawer has the following changes:

1. Added support for content in the drawer that is dynamically sized. Updating the
   preferredContentSize at any time will cause the drawer to respond appropriately.
2. Added a top handle that sits at the top of the drawer to show scrollability. It disappears
   when the drawer goes to full screen or when there is no more to scroll.
3. Added a way to customize the color of the top handle.
4. The drawer's header height expands as it goes to full screen to cover the safe area and status
   bar. We now provide a delegate to allow clients to be aware of the relevant top content inset so
   they lay out their header content appropriately based on height changes.
5. Implemented performance improvements by removing some calls to preferredContentSize of the
   contentViewController within the drawer implementation.

API changes

AppBar+ColorThemer

MDCAppBarColorThemer(ToBeDeprecated)

modified class method: +applySurfaceVariantWithColorScheme:toAppBar: in MDCAppBarColorThemer(ToBeDeprecated)

modified class method: +applySemanticColorScheme:toAppBar: in MDCAppBarColorThemer(ToBeDeprecated)

AppBar+TypographyThemer

MDCAppBarTypographyThemer(ToBeDeprecated)

modified class method: +applyTypographyScheme:toAppBar: in MDCAppBarTypographyThemer(ToBeDeprecated)

BottomNavigation

MDCBottomNavigationBar

new property: elevation in MDCBottomNavigationBar

NavigationDrawer

MDCBottomDrawerViewControllerDelegate

new protocol: MDCBottomDrawerViewControllerDelegate

new method: -bottomDrawerControllerDidChangeTopInset:topInset: in MDCBottomDrawerViewControllerDelegate

MDCBottomDrawerPresentationController

new property: topHandleHidden in MDCBottomDrawerPresentationController

new property: topHandleColor in MDCBottomDrawerPresentationController

MDCBottomDrawerViewController

new property: topHandleColor in MDCBottomDrawerViewController

new property: delegate in MDCBottomDrawerViewController

new property: topHandleHidden in MDCBottomDrawerViewController

Component changes

ActionSheet

• Add example comparing Material and UIKit (#5724) (ianegordon)
• Try to fix MaterialComponentsAlpha (#5541) (Andrew Overton)

AppBar

• Annotate APIs that need to be deprecated. (#5614) (featherless)

BottomNavigation

• Add elevation property (#5733) (Cody Weaver)
• Minor code clean-up. (#5742) (Robert Moore)

NavigationDrawer

• Add dynamically sizing support for the drawer + performance improvements (#5587) (Yarden Eitan)
• Added Color API for the top handle. (#5592) (Yarden Eitan)
• Added a top handle to the drawer (#5591) (Yarden Eitan)
• Adding a top inset delegate for the drawer (#5674) (Yarden Eitan)
• added additional example with limited content that doesnt reach fullscreen (#5743) (Yarden Eitan)
• call getter instead (#5710) (Yarden Eitan)

Snackbar

• Fix for Snackbar themer breaking Snackbar examples on dragons (#5731) (Yarden Eitan)
• change snackbar to default to use the new snackbar and not legacy (#5732) (Yarden Eitan)

Multi-component changes

• [MDC Swift] Add guards for Swift 4.2+ (#5634) (Robert Moore)
• Global replace of integral single-precision literals with integer literals. (#5709) (Robert Moore)
• Global replace of single-precision floats with CGFloat casts. (#5718) (Robert Moore)
• No longer using -init for Color Scheme. (#5734) (Robert Moore)
• fix typo UIConnect... -> UIContent... (#5735) (Ralph)