Xcode not recognizing already defined sprite? - ios

Question

I'm making a simple iOS game where the goal is to get the angel in the middle of the screen to shoot arrows at monsters coming at him from all sides. But when I try to calculate the direction of the arrow being shot, Xcode says that the "angel" sprite doesn't exist, even though I've already used it. Here's my code:
#import "MyScene.h"
static inline CGPoint rwAdd(CGPoint a, CGPoint b)
{
return CGPointMake(a.x + b.x, a.y + b.y);
}
static inline CGPoint rwSub(CGPoint a, CGPoint b)
{
return CGPointMake(a.x - b.x, a.y - b.y);
}
static inline CGPoint rwMult(CGPoint a, float b)
{
return CGPointMake(a.x * b, a.y * b);
}
static inline float rwLength(CGPoint a)
{
return sqrtf(a.x * a.x + a.y * a.y);
}
static inline CGPoint rwNormalize(CGPoint a)
{
float length = rwLength(a);
return CGPointMake(a.x / length, a.y / length);
}
#implementation MyScene
- (id) initWithSize: (CGSize) size
{
if (self = [super initWithSize:size])
{
self.backgroundColor = [SKColor colorWithRed: 1.0 green: 1.0 blue: 1.0 alpha: 1.0];
SKSpriteNode *angel = [SKSpriteNode spriteNodeWithImageNamed: #"Angel"];
angel.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));
angel.xScale = 0.25;
angel.yScale = 0.25;
[self addChild: angel];
}
return self;
}
- (void) touchesEnded: (NSSet *) touches withEvent: (UIEvent *) event
{
UITouch * touch = [touches anyObject];
CGPoint location = [touch locationInNode: self];
SKSpriteNode *arrow = [SKSpriteNode spriteNodeWithImageNamed:#"Arrow"];
projectile.position = self.angel.position;
CGPoint offset = rwSub(location, arrow.position);
[self addChild: arrow];
CGPoint direction = rwNormalize(offset);
CGPoint shootAmount = rwMult(direction, 500);
CGPoint realDest = rwAdd(shootAmount, arrow.position);
float velocity = 480.0/1.0;
float realMoveDuration = self.size.width / velocity;
SKAction *actionMove = [SKAction moveTo: realDest duration: realMoveDuration];
SKAction *actionMoveDone = [SKAction removeFromParent];
[arrow runAction: [SKAction sequence: #[actionMove, actionMoveDone]]];
}
#end
When I'm defining "arrow.position = self.angel.position", Xcode doesn't recognize "angel" as a sprite. Any help is much appreciated, thanks.

Answer 1

The variable is out of scope. You are setting it as a child so you must retrieve it in the other touchesEnded: method you will need to do the following:
SKSpriteNode *angel = [self childNodeWithName:#"Angel"];