Apple has not made products itself, or in the USA in many years now (although they will be making the new Mac Pro in the USA). Almost all Apple products - laptops, computers, iPads, iPods, iPhones are made in China and have been for years. Recently, reportedly they have also contracted with manufacturers in Taiwan again as well, to meet demand for their products (they've used companies in Taiwan before anyway, at least with PowerBooks).
Almost all smart phones, regardless of brand name, are made in Asia as are most computers. There are even plants in China that simultaneiously assemble machines for Apple, Dell and others all in the same factory complex.
Modern electronics has largely separated into the companies that develop, design and market the products, and the contractors they use to actually make them. And China is now the single largest manufacturer of computers, tablets and smart/cell phones.
Places around Beijing and Shanghai are densely packed with electronics factories.