i'm new to sprite Kit and having an issue with changing a current SKSpriteNode image.

My spriteNode looks like this

```
mover = [SKSpriteNode spriteNodeWithTexture:Texture1];
[mover setScale:1.0];
[self addChild:mover];

```

then i have this method that should change the mover image, but it is not. What am i doing wrong?

```
- (void)didBeginContact:(SKPhysicsContact *)contact {
    if (contact.bodyA.categoryBitMask == worldCategory) {
        SKTexture* explodeTexture1 = [SKTexture textureWithImageNamed:@"explode"];
        explodeTexture1.filteringMode = SKTextureFilteringNearest;

        mover = [SKSpriteNode spriteNodeWithTexture:explodeTexture1];
    }
}

```