I'm so new to xcode, I have a speechkit framework with following files as shown in image below

![enter image description here](https://i.stack.imgur.com/yP0hJ.png)

Now When I add this framework to my xcode project the header files are shown empty as below 

![enter image description here](https://i.stack.imgur.com/MXYaX.png)

and I end up with build error 'Lexical preprocessor issue SpeechKit/SpeechKit.h' file not found'. What is the issue with it? How to solve this?