这是一个带有字母的选择圆盘，通过手势滑动可以选择对应的字母或者选择位。这里同样可以作为其他类似圆形滑动选择控件的思路参考 #Author Wangjia55(wangjia5509@gmail.com）

http://blog.csdn.net/wangjia55 #效果图 #LICENSE Copyright (c) 2015 WangJia55 wangjia5509@gmail.com Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.