https://qooah.com/2014/08/09/%e3%80%90%e6%95%99%e5%ad%b8%e3%80%91%e8%87%aa%e5%ae%9a%e6%89%8b%e5%8b%a2-%e6%95%99%e4%bd%a0%e5%ae%89%e8%a3%9dgesture-navigation/