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Sprite set, remove animated textures from memory

I initialize about 30 animated textures in my view controller when loading the game as follows:

for i=0; i<atlasName.count; i++ {
        frameNumber = animationTextures.animationTextureAtlas[i].textureNames.count
        firstFrameName = "\(atlasName[i])1"

        animationTextures.animationFrames.append([animationTextures.animationTextureAtlas[i].textureNamed(firstFrameName)])

        for j=2; j<=frameNumber; j++ {
            var frameName = "\(atlasName[i])\(j)"
            animationTextures.animationFrames[i].append(animationTextures.animationTextureAtlas[i].textureNamed(frameName))
        }

        animationTextures.firstFrame.append(animationTextures.animationFrames[i][0])
    }

Basically I put all the animations in an array so that I can easily access them.

During the game, each of these animations appears for a short period of time, and when I do not need them, I use .removeFromParent () to delete it, but the problem is that it still remains in the device’s memory and therefore once in the game about 15-20 animations appear and enter the memory, it reaches about 450-500 MB and crashes out of the game on iPhone 4 and 4s.

Does anyone know how I can really remove this animation from memory so that it does not take up space if it is no longer needed?

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450MB + . .

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