https://purengom.com/2008/07/14/iphone-%ec%b6%9c%ec%8b%9c%ec%99%80-%ec%95%a0%ed%94%8c%ec%97%90-%ea%b4%80%ed%95%9c-%eb%b9%84%ed%8c%90%ec%97%90-%eb%8c%80%ed%95%9c-%ec%83%9d%ea%b0%81-apple-way/