拉伸SKSpriteNodes

Question

我有一個SKSpriteNode與SKTexture看到下面。我將我的節點的centerRect設置爲我會告訴它向上伸展以便箭頭不會變形。該圖像是190x190 px，我設置我的centerRect這樣：

CGRectMake(90/190, 90/190, 5/190, 5/190); 

從我從docs明白了，這是說，每個角落90x90 px，和3×3網格的中心矩形是5x5 px。這意味着只有中心的5x5像素被拉伸。

但我的結果是這樣的：

我有一個叫Obstacle類是SKSpriteNode一個子類，當它被初始化，它上面連同圖像名稱這通過在CGRect方法：

-(void)setTextureNamed:(NSString*)imageName centerRect:(CGRect)rect 
{ 
// set texture for sprite 
UIImage* image = [UIImage imageNamed: imageName]; 

SKTexture* texture = [SKTexture textureWithImage: image]; 
[self setTexture: texture]; 

// make stretchable 
self.centerRect = rect; 

[self setSize: texture.size]; 
} 

而且在我SKScene，當添加Obstacle，該代碼被稱爲：

int bottomHeight, topHeight, topY, bottomY, max; 
bottomY = 0;//_floor.size.height/2; 
max = self.view.frame.size.height - _floor.size.height/2 - 2*OBSTACLE_PADDING - 2*OBSTACLE_MIN_HEIGHT; 
bottomHeight = arc4random() % max + OBSTACLE_MIN_HEIGHT; 
topY = bottomHeight + OBSTACLE_PADDING + _floor.size.height; 
topHeight = self.view.frame.size.height - topY; 

bottomY += bottomHeight/2; 
topY += topHeight/2; 

Obstacle *bottom = [[Obstacle alloc] initWithHeight: bottomHeight flipped: NO]; 
bottom.zPosition = 0; 
[bottom setPosition: CGPointMake(400, bottomY)]; 

NSArray* objs = @[bottom, top]; 

for (Obstacle* o in objs) 
{ 
    o.zPosition = 2; 
    [self addChild: o]; 
    [o runAction: [SKAction 
         moveToX: -100 duration: SPAWN_SPEED*2] 
      completion:^{ 
       [o removeFromParent]; 
      }]; 

} 

Answer 1

設置SKSpriteNode的比例不是大小。 [self setScale：...]