Scale text on Cupertino widgets to match iOS text sizes #12158
Labels
a: accessibility
Accessibility, e.g. VoiceOver or TalkBack. (aka a11y)
a: fidelity
Matching the OEM platforms better
f: cupertino
flutter/packages/flutter/cupertino repository
framework
flutter/packages/flutter repository. See also f: labels.
P3
Issues that are less important to the Flutter project
platform-ios
iOS applications specifically
team-ios
Owned by iOS platform team
triaged-ios
Triaged by iOS platform team
Comments
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Actually it might all be linear. It looks like it's roughly 1.4 from X Small to XXX Large, if you assume that the values above are rounded to the nearest pixel. (That is, if you assume there's an error of plus or minus 0.5 in the first and last column, you can get 1.4 to multiply from the first column to the last column.) |
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For Cupertino widgets, we need to figure out how to scale our text sizes so that when someone asks for a "headline" or other named sizes on iOS, they get the size that they expect.
On Android, there is a single FONT_SCALE (a double) that scales the font based on a system preference, but on iOS, the font size preference doesn't scale linearly with the different font usages. For instance, an Extra Extra Extra Large headline on iOS is 18% larger, whereas a footnote is only 15% larger, and an "Extra Large" headline is 5% larger, while an "Extra Large" caption3 doesn't change size at all.
(table from this stackoverflow post)
In order to make sure that Cupertino assets get the sizes that match what iOS does, we'll probably need to change the tables in
typography.dartso that instead of fixed values for the font sizes, we do something more clever on each platform based on the preferred type size and the usage for the font.The text was updated successfully, but these errors were encountered: