步骤状态枚举
已完成：小圆点图标，使用进行中颜色
未开始：小圆点图标，使用未激活颜色
进行中：圆形图标，使用进行中颜色
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.