typedef NS_ENUM(NSUInteger, CKStackLayoutDirection) {
  //  垂直方向
  CKStackLayoutDirectionVertical,
  //  水平方向
  CKStackLayoutDirectionHorizontal,
};

/** If no children are flexible, how should this component justify its children in the available space? */
typedef NS_ENUM(NSUInteger, CKStackLayoutJustifyContent) {
  /**
   On overflow, children overflow out of this component's bounds on the right/bottom side.
   On underflow, children are left/top-aligned within this component's bounds.
   */
  //  左对齐
  CKStackLayoutJustifyContentStart,
  /**
   On overflow, children are centered and overflow on both sides.
   On underflow, children are centered within this component's bounds in the stacking direction.
   */
  //  居中
  CKStackLayoutJustifyContentCenter,
  /**
   On overflow, children overflow out of this component's bounds on the left/top side.
   On underflow, children are right/bottom-aligned within this component's bounds.
   */
  //  右对齐
  CKStackLayoutJustifyContentEnd,
};

typedef NS_ENUM(NSUInteger, CKStackLayoutAlignItems) {
  /** Align children to start of cross axis */
  //  交叉轴起点对齐
  CKStackLayoutAlignItemsStart,
  /** Align children with end of cross axis */
  CKStackLayoutAlignItemsEnd,
  //  交叉轴终点对齐
  /** Center children on cross axis */
  //  交叉轴居中对齐
  CKStackLayoutAlignItemsCenter,
  /** Expand children to fill cross axis */
  //  交叉轴方向拉伸
  CKStackLayoutAlignItemsStretch,
};

/**
 Each child may override their parent stack's cross axis alignment.
 @see CKStackLayoutAlignItems
 */
typedef NS_ENUM(NSUInteger, CKStackLayoutAlignSelf) {
  /** Inherit alignment value from containing stack. */
  CKStackLayoutAlignSelfAuto,
  CKStackLayoutAlignSelfStart,
  CKStackLayoutAlignSelfEnd,
  CKStackLayoutAlignSelfCenter,
  CKStackLayoutAlignSelfStretch,
};

static std::vector<CKStackLayoutComponentChild> createChildren(NSArray* list){
  std::vector<CKStackLayoutComponentChild> children;
  for (VPANewsModel*newsModel in list) {
    children.push_back({[VPANewsComponent newWithNewsModel:newsModel]});
  }
  return children;
}

+ (instancetype)newWithComponent:(CKComponent *)component
                      background:(CKComponent *)background;

+ (instancetype)newWithCenteringOptions:(CKCenterLayoutComponentCenteringOptions)centeringOptions
                          sizingOptions:(CKCenterLayoutComponentSizingOptions)sizingOptions
                                  child:(CKComponent *)child
                                   size:(const CKComponentSize &)size;