Change SpriteNodes coordinates with User touch - ios

Question

I'm currently programming a small game with SpriteKit in Xcode for the iOS platform. I wrote a code which adds some SpriteNodes on 2 different "lines", so half of the nodes are moving with the y-coordinate 100 and the others with y = 200, and they're all moving from the left side to the right which an infinity loop. Now I want that the user can touch on one SpriteNode, then moves his finger to another SpriteNode, but it has to be located on another line, then removes his finger and the SpriteNode with the TOUCHBEGAN should change its y-coordinate with the TOUCHEND Node. How can I accomplish this?
-(void)add
{
SKSpriteNode *sprite2 = [SKSpriteNode spriteNodeWithImageNamed:#"test1.png"];
sprite2.position = CGPointMake(-40, self.frame.size.height / 2);
sprite2.size = CGSizeMake(100, 32);
SKSpriteNode *sprite3 = [SKSpriteNode spriteNodeWithImageNamed:#"test.png"];
sprite3.position = CGPointMake(-40, (self.frame.size.height / 2) + 90);
sprite3.size = CGSizeMake(32, 100);
[self addChild:sprite1];
[self addChild:sprite2];
SKAction *actionMove1 = [SKAction moveTo:CGPointMake(400, (self.frame.size.height / 2) - 90) duration:12];
SKAction *actionMove2 = [SKAction moveTo:CGPointMake(200, (self.frame.size.height / 2)) duration:12];
SKAction *actionMoveDone = [SKAction removeFromParent];
[sprite1 runAction:[SKAction sequence:#[actionMove1, actionMoveDone]]];
[sprite2 runAction:[SKAction sequence:#[actionMove2, actionMoveDone]]];
}
- (void)updateWithTimeSinceLastUpdate:(CFTimeInterval)timeSinceLast
{
self.lastSpawnTime += timeSinceLast;
if (self.lastSpawnTime > 2)
{
self.lastSpawnTime = 0;
[self add];
}
}
- (void)update:(CFTimeInterval)currentTime
{
CFTimeInterval timeSinceLast = currentTime - self.lastUpdateTime;
self.lastUpdateTime = currentTime;
if (timeSinceLast > 2)
{
timeSinceLast = 1.0 /60.0;
self.lastUpdateTime = currentTime;
}
[self updateWithTimeSinceLastUpdate:timeSinceLast];
}

Answer 1

You have to subclass SkSpriteNode:
to detect TouchEvents you have to set "userInteractionEnabled" to "YES"
to react on TouchEvents implement the touch method which fits for you needs:
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{}
In this method you can change the coordinates of your sprite

Answer 2

add these function like that in your sksence
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent )event {
/ Called when a touch begins */
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
if([node.name isEqualToString:#"plane"])
{
NSLog(#"_______touch ended");
//x and y position of object at Scene
NSLog(#"%f",node.position.x);
NSLog(#"%f",node.position.y);
NSLog(#"%#",node);
}
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
/* Called when a touch begins */
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
if([node.name isEqualToString:#"plane"])
{
NSLog(#"_______touch mobing");
}
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
/* Called when a touch begins */
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
if([node.name isEqualToString:#"plane"])
{
NSLog(#"______touch begin");
//x and y position of object at Scene
NSLog(#"%f",node.position.x);
NSLog(#"%f",node.position.y);
NSLog(#"%#",node);
}
}