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Adam Gleitman
11c8bf3137
Summary: This adds Dynamic Type support in iOS as described [here](https://github.com/react-native-community/discussions-and-proposals/issues/519). `Text` elements have a new prop, `dynamicTypeRamp`, that allows users to specify which font ramp a particular `Text` element should take on as the OS's accessibility setting for text size. The different types line up with different values of `UIFontTextStyle`. If not specified, we default to the current behavior. ~~For the moment, this change is only for Paper. I tried applying a corresponding change to Fabric by adding an additional field to [`facebook::react::TextAttributes`](https://github.com/facebook/react-native/blob/main/ReactCommon/react/renderer/attributedstring/TextAttributes.h) and changing [`RCTEffectiveFontSizeMultiplierFromTextAttributes`](https://github.com/facebook/react-native/blob/afb124dcf0cdf0db525acc7cfd2cea2742c64068/ReactCommon/react/renderer/textlayoutmanager/platform/ios/RCTAttributedTextUtils.mm#L79-L84) to use that new field, but in the process I discovered that this function doesn't seem to ever get called, hence [this bug](https://github.com/facebook/react-native/issues/34990).~~ ## Changelog [iOS] [Added] - Dynamic Type support Pull Request resolved: https://github.com/facebook/react-native/pull/35017 Test Plan: Validated with a test page in RNTester. Screenshots follow: A) Default text size B) Largest non-accessibility text size C) Largest accessibility text size, split across two screenshots due to size | A | B | C | |-|-|-| |  |  |  | |||  | Reviewed By: sammy-SC Differential Revision: D40779346 Pulled By: NickGerleman fbshipit-source-id: efc7a8e9810a93afc82c5def97af15a2e8453d90
