kCupertinoButtonDefaultIconSize top-level constant
double
const kCupertinoButtonDefaultIconSize
The default value for IconThemeData.size of CupertinoButton.child.
Set to match the most-frequent size of icons in iOS (matches md/lg).
Used only when the CupertinoTextThemeData.actionTextStyle or CupertinoTextThemeData.actionSmallTextStyle has a null TextStyle.fontSize.
Implementation
const double kCupertinoButtonDefaultIconSize = 20.0;