update method
精灵更新
Implementation
void update(double dt) {
/// 子类覆盖
/// 清除不可见的并且需要回收的的精灵
children.removeWhere((sprite) => (sprite.visible == false && sprite.recyclable));
}
精灵更新
void update(double dt) {
/// 子类覆盖
/// 清除不可见的并且需要回收的的精灵
children.removeWhere((sprite) => (sprite.visible == false && sprite.recyclable));
}