StepperStyle

默认样式：带方形背景的加减按钮，按钮与输入框紧贴排列

圆角样式：使用圆形图标按钮，无背景色，视觉更轻量

Returns a representation of an immutable list of all enum entries, in the order they're declared.

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Returns an array containing the constants of this enum type, in the order they're declared.