Moving background stops repeating on Spritekit - ios

Question

This is my code to make my background repeat, just one background and it should be repeating forever:
SKTexture* bgTexture = [SKTexture textureWithImageNamed:#"nightbackground"];
bgTexture.filteringMode = SKTextureFilteringNearest;
SKAction* movebgSprite = [SKAction moveByX:-bgTexture.size.width*2 y:0 duration:0.1 * bgTexture.size.width*2];
SKAction* resetbgSprite = [SKAction moveByX:bgTexture.size.width*2 y:0 duration:0];
SKAction* movebgSpritesForever = [SKAction repeatActionForever:[SKAction sequence:#[movebgSprite, resetbgSprite]]];
for( int i = 0; i < 2 + self.frame.size.width / ( bgTexture.size.width * 2 ); ++i ) {
SKSpriteNode* sprite = [SKSpriteNode spriteNodeWithTexture:bgTexture];
[sprite setScale:1.0];
sprite.zPosition = -20;
sprite.position = CGPointMake(self.size.width/2, self.size.height/2);
[sprite runAction:movebgSpritesForever];
[self addChild:sprite];
But it does not repeat forever, it stops after a while. What might be wrong with it?

Answer 1

This case will work in landscape orientation and have the view repeat scrolling infinitely to the left (-x direction). You create two instances of the background SKSPriteNode and place them next to each other. When the first one scrolls completely off the left side of the screen, it is placed to the right of the second background sprite node.
in didMoveToView:
for (int i = 0; i < 2; i++) {
SKSpriteNode *bg = [SKSpriteNode spriteNodeWithImageNamed:#"background"];
bg.anchorPoint = CGPointZero;
bg.position = CGPointMake(i * bg.size.width, 0);
bg.name = #"starBackground";
[self addChild:bg];
}
in the update: loop
[self enumerateChildNodesWithName:#"background" usingBlock:^(SKNode *node, BOOL *stop) {
SKSpriteNode *bg = (SKSpriteNode *)node;
bg.position = CGPointMake(bg.position.x - 1.5, bg.position.y);
if (bg.position.x <= -bg.size.width) {
bg.position = CGPointMake(bg.position.x + bg.size.width * 2, bg.position.y);
}
}];