In the final part of our three-part tutorial series, you’ll learn how to integrate Unity UI into a working game.
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/6568-introduction-to-unity-ui-part-3
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/6568-introduction-to-unity-ui-part-3
Firstly, thank you for wonderful tutorial 
I have a trouble. I couldn’t adjust master volume by using VolumeSlider. i have made “On Value Changed()” section as you show. But when i slide the handle, the master volume suddenly become zero and does not turn back! 
How can i use slider properly? Thank you
High @lostbrush thank you for checking out the tutorial :]
It looks like you have selected the wrong function option. The slider will have access to the AudioSource.volume via the Dynamic float option. The option you have selected is passing a reference value, which you have set to 0 there in the inspector. You want the option I have highlighted below.
This tutorial is more than six months old so questions are no longer supported at the moment for it. Thank you!