Andrew Overton e4f8a63b9e
[ProgressView] Add accessibility docs for MDCProgressView (#4543)
* Add accessibility docs for MDCProgressView

* tweak wording
2018-07-13 15:09:38 -04:00

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Markdown

### MDCProgressView
#### -accessibilityValue
Like UIProgressView, MDCProgressView's `accessibilityValue` is based on the current value of the ProgressView's
`progress` property. Also like UIProgressView, this `accessibilityValue` takes the form of a whole number
percentage. To ensure the same behavior between the two classes, the MDCProgressView class has a static
UIProgressView that instances query for its `accessibilityValue` whenever they need to provide their own.
The ProgressView announces a new `accessibilityValue` whenever its `progress` changes if VoiceOver is on.