SpriteKit Clicker Game Select Spawn Area for Clickable things? - ios

Question

I'm New to SpriteKit and build a simple CLickerGame in SpriteKit. Now i have the game finish but the thing which should spawn to click on it, spawns from time to time outside the screen. Where can i select the arc4random area where the thing should spawn?
#implementation MyScene
-(void)CreateTestObject
{
SKSpriteNode *TestObject = [SKSpriteNode spriteNodeWithImageNamed:#"TestObject"];
int maxX = CGRectGetMaxX(self.frame);
float ranX = (arc4random()%maxX) + 1;
int maxY = CGRectGetMaxY(self.frame);
float ranY = (arc4random()%maxY) + 1;
TestObject.position = CGPointMake(ranX, ranY);
TestObject = CGSizeMake(75, 75);
TestObject = #"Object";
[self addChild:TestObject];
}
-(id)initWithSize:(CGSize)size
{
if (self = [super initWithSize:size])
{
bg = [SKSpriteNode spriteNodeWithImageNamed:#"bg.png"];
bg.position = CGPointMake(160, 284);
bg.size = CGSizeMake(self.frame.size.width, self.frame.size.height);
[self addChild:bg];
[self CreateTestObject];
}
return self;
}
-(void)selectNodeForTouch:(CGPoint)touchLocation
{
SKSpriteNode *touchedNode = (SKSpriteNode *)[self nodeAtPoint:touchLocation];
if([[touchedNode name] isEqualToString:#"TestObject"])
{
SKSpriteNode *TestObject = (SKSpriteNode *)[self childNodeWithName:#"TestObject"];
TestObject.name = #"DisabledTestObject";
SKAction *grow = [SKAction scaleTo:1.2 duration:0.1];
SKAction*shrink = [SKAction scaleTo:0 duration:0.07];
SKAction *removeNode = [SKAction removeFromParent];
SKAction *seq = [SKAction sequence:#[grow, shrink, removeNode]];
[TestObject runAction:seq];
[self CreateTestObject];
[self runAction:[SKAction playSoundFileNamed:#"Sound.aif" waitForCompletion:NO]];
}
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
for (UITouch *touch in touches)
{
//CGPoint location = [touch locationInNode:self];
UITouch *touch = [touches anyObject];
CGPoint positionInScene = [touch locationInNode:self];
[self selectNodeForTouch:positionInScene];
}
}
#end

Answer 1

Modify the max values for your (x,y) coordinates of any object being added to your view.
For example, on an iPhone 5 display in landscape mode and the spawned object being of size width=100, height=100, the max x value should be no more than 518. Width of screen being 568 less half the width of your object (50).
The same logic applies for the y value. The max y value should be 270 given the same object dimensions.
The above assumes that you have not changed your object's anchor point from (0.5,0.5) to another value.