ViewSendData解决键盘遮挡和view传值的一个小例子，精选ios编程学习源码，很好的参考资料。-ViewSendData a small example keyboard occlusion and view value, selection of learning IOS programming source code, a good reference.

在iOS设备为输入键盘NumPad的状态时，实现对数字键的自定义，在空白的地方加上确定键。- In iOS device as an input keyboard NumPad the state, to achieve self-definition of the number keys, plus a blank place the OK button.

TI BLE HID Keyboard Emulator