+ (instancetype)node;

+ (nullable instancetype)nodeWithFileNamed:(NSString*)filename;

- (CGRect)calculateAccumulatedFrame;

//节点的父节点的位置坐标系统

@property (nonatomic) CGPoint position;

//z值的节点(用于排序)。负z是”到“屏幕,正面屏幕的z是“出去”。更大的zPosition将面前的一个较小的zPosition排序。

@property (nonatomic) CGFloat zPosition;

//绕z轴旋转(弧度)

@property (nonatomic) CGFloat zRotation;

//x比例

@property (nonatomic) CGFloat xScale;

//y比例

@property (nonatomic) CGFloat yScale;

//速度

@property (nonatomic) CGFloat speed;

//透明度

@property (nonatomic) CGFloat alpha;

//控制节点的行为是否更新或暂停

@property (nonatomic, getter = isPaused) BOOL paused

//是否隐藏

@property (nonatomic, getter = isHidden) BOOL hidden;

//控制节点是否接收触摸事件

@property (nonatomic, getter=isUserInteractionEnabled) BOOL userInteractionEnabled;

//父节点

@property (nonatomic, readonly, nullable) SKNode *parent;

//子节点

@property (nonatomic, readonly) NSArray<SKNode*> *children;

//节点名称

@property (nonatomic, copy, nullable) NSString *name;

//节点所在的场景

@property (nonatomic, readonly, nullable) SKScene* scene;

//物理身体连接的节点,同步,旋转,和地位

@property (nonatomic, retain, nullable) SKPhysicsBody *physicsBody;

//一个可选的字典,可用于您自己的数据存储在一个节点。默认为零。

@property (nonatomic, retain, nullable) NSMutableDictionary *userData;

//运动学约束,用于解决本土知识

@property (nonatomic, copy, nullable) SKReachConstraints *reachConstraints;

//可选的一系列SKConstraints和物理约束是评估每一帧后操作。节点的转换将被改变,以满足约束条件。

@property (nonatomic, copy, nullable) NSArray<SKConstraint*> *constraints;

- (void)setScale:(CGFloat)scale;

- (void)addChild:(SKNode *)node;

- (void)insertChild:(SKNode *)node atIndex:(NSInteger)index;

- (void)removeChildrenInArray:(NSArray<SKNode*> *)nodes;

- (void)removeAllChildren;

- (void)removeFromParent;

- (void)moveToParent:(SKNode *)parent;

- (nullable SKNode *)childNodeWithName:(NSString *)name;

- (void)enumerateChildNodesWithName:(NSString *)name usingBlock:(void (^)(SKNode *node, BOOL *stop))block;

- (BOOL)inParentHierarchy:(SKNode *)parent;

- (void)runAction:(SKAction *)action;

- (void)runAction:(SKAction *)action completion:(void (^)())block;

- (void)runAction:(SKAction *)action withKey:(NSString *)key;

- (BOOL)hasActions;

- (nullable SKAction *)actionForKey:(NSString *)key;

- (void)removeActionForKey:(NSString *)key;

- (void)removeAllActions;

- (BOOL)containsPoint:(CGPoint)p;

- (SKNode *)nodeAtPoint:(CGPoint)p;

- (NSArray<SKNode*> *)nodesAtPoint:(CGPoint)p;

- (CGPoint)convertPoint:(CGPoint)point fromNode:(SKNode *)node;

- (CGPoint)convertPoint:(CGPoint)point toNode:(SKNode *)node;

- (BOOL)intersectsNode:(SKNode *)node;

- (BOOL)isEqualToNode:(SKNode *)node;

/* Returns an array of GKPolygonObstacles from a group of SKSpriteNode's textures in scene space. For use with GPObstacleGraph in GameplayKit */

+ (NSArray<GKPolygonObstacle*> *)obstaclesFromSpriteTextures:(NSArray<SKNode*>*)sprites accuracy:(float)accuracy;

/* Returns an array of GKPolygonObstacles from a group of SKNode's transformed bounds in scene space. For use with GPObstacleGraph in GameplayKit */

+ (NSArray<GKPolygonObstacle*> *)obstaclesFromNodeBounds:(NSArray<SKNode*>*)nodes;

/* Returns an array of GKPolygonObstacles from a group of SKNode's physics bodies in scene space. For use with GPObstacleGraph in GameplayKit */

+ (NSArray<GKPolygonObstacle*> *)obstaclesFromNodePhysicsBodies:(NSArray<SKNode*>*)nodes;

- (CGPoint)locationInNode:(SKNode *)node;