一个基于单文档视图的程序，leftview列出硬盘驱动器，双击其中的TXT文件，可以在rightview中显示出其内容-View a document based on single procedures, leftview hard drives are listed, double-click one of the TXT file, can be shown rightview its contents

Image view,快速 ~-Image view, fast ~

类似path效果 左右侧边栏 滑动leftView，homeView-like path

文本框中对输入内容进行分块显示效果 利用textfield 的leftview 效果 每次输入以空格结束-Enter the contents of the text box on the block display The effect of using the textfield leftview end each entry with a space