How to store position in spritekit - ios

Question

I need to change the character appearance during the game. My character define by a node:
SKSpriteNode* _character;
....
SKTexture* tmp = [SKTexture textureWithImageNamed:string];
tmp.filteringMode = SKTextureFilteringNearest;
[textureArray addObject:tmp];
_character = [SKSpriteNode spriteNodeWithTexture:tmp];
Then under a certain condition in the game, if I check it satisfied, I will change the appearance by:
-(void)update:(CFTimeInterval)currentTime {
/* Called before each frame is rendered */
if (condition_satisfied) {
...
_store.position = _character.position;
[_character removeFromParent];
...
//load new character texture here, I won't post the code, for short. Then
....
_character.position = _store.position;
...
[self addChild:_character];
}
I use a store node to store the position, because my character's position will change during the game by human touch. But in the game, it will always cause crash, collision... So I guess that is not the right way to restore the right position of character.
How should I do here ?

Answer 1

To change a texture just set SKSpriteNode's texture property:
_character.texture = [SKTexture textureWithImageNamed:#"image"];
Or use SKAction, if you want to add some fading effect when texture is changing:
SKAction *fadeOut = [SKAction fadeOutByDuration:0.3f];
SKAction *fadeIn = [SKAction fadeInByDuration:0.3f];
SKAction *changeTexture = [SKTexture setTexture:[SKTexture textureWithImageNamed:#"image"]];
[_character runAction:[SKAction sequence:#[fadeOut,changeTexture,fadeIn]]];
There is no need to removeFromParent the node.
If you need to store node's position, it's better to store it in #property:
#interface GameScene()
#property (nonatomic) CGPoint characterPosition;
#end
#implementation GameScene
-(void)update:(CFTimeInterval)currentTime {
/* Called before each frame is rendered */
if (condition_satisfied) {
...
self.characterPosition = _character.position;
[_character removeFromParent];
...
//load new character texture here, I won't post the code, for short. Then
....
_character.position = self.characterPosition;
...
[self addChild:_character];
}
#end

Answer 2

Instead of creating a SKSpriteNode to store the position of the node, you can simply do so in a CGPoint variable.
-(void)update:(CFTimeInterval)currentTime {
/* Called before each frame is rendered */
if (condition_satisfied) {
...
CGPoint characterPosition = _character.position;
[_character removeFromParent];
...
//load new character texture here, I won't post the code, for short. Then
....
_character.position = characterPosition;
...
[self addChild:_character];
}