value property
动画的数字，当没有 controller 时生效，用于不需要额外控制数字时，同时存在时，controller 具有更高的优先级
Effective when there is no controller, used when no additional control digits are needed controller has higher priority
Implementation
final num? value;
value property
动画的数字，当没有 controller 时生效，用于不需要额外控制数字时，同时存在时，controller 具有更高的优先级
Effective when there is no controller, used when no additional control digits are needed controller has higher priority
final num? value;