[Solved] What is the equivalent code for this Swift code?

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I think it is the following code, I haven’t tested it, since I don’t know the result. 

CGAffineTransform *scale = CGAffineTransformMakeScale((1 - 0.5 * scaleFactor), (1 - 0.5 * scaleFactor));
CGAffineTransform *scale2 = CGAffineTransformMakeTranslation(-(self.player.bounds.width / 4 * scaleFactor), -(self.player.bounds.height / 4 * scaleFactor));
// concat the 2 CGAffineTransforms. 
CGAffineTransform *transform = CGAffineTransformConcat(scale, scale2);
self.player.transform = transform;

solved What is the equivalent code for this Swift code?