如何通过按钮将segue从一个视图控制器推送到另一个视图控制器?

I'm new to Objective C and I've been trying to do Segue using a button from one view controller to another. I wish to use a push type for the segue with which, the first view controller is embedded in a navigation view controller. Below is the .m and .h files of the first view controller.I'm new to Objective C and I've been trying to