https://qooah.com/2015/01/25/%e6%9c%89%e5%a0%b1%e5%91%8a%e6%8c%87-ios-%e7%94%a8%e6%88%b6%e6%af%94-android-%e7%94%a8%e6%88%b6%e6%9b%b4%e5%96%9c%e6%ad%a1%e6%8b%8d%e6%94%9d/