一种比较仿真的翻页效果，平滑翻和从边角翻都支持，pdf，图片等格式-Comparison of simulation results of a flip, smooth turn and turned from the corner support, pdf, pictures and other formats

Instapaper: You can send notes to your instapaper.com account by selecting the action button in the lower left corner on the main list page. This will bring up an action list that lets you select Instapaper which will send your note to your instapa

ios自定义键盘，即在弹出数字键盘的时候左下角自定义一个控件，以方便进行操作。很有用处哦。-ios custom keyboard, ie when the lower left corner of the pop-up numeric keypad customize a control to facilitate operation. Useful oh.