Xcode 6.1 can't find 'debug view hierarchy' button

Question

My Xcode version is 6.1. I can find 'debug view hierarchy' button in a new created project, but not with my old project(and the menu item 'capture view hierarchy are always grayed out).

My old project is 32-bit only mac project(not ios) with no arc. my code written mixed with objective-c and c++.

Anyone knows why my old project can't use view debugger?

Answer 1

Doesn't work on iOS 7. It only works with iOS 8+ simulator.

Answer 2

In Xcode 6.2, it is not in the Debug Area, it is in a Debug Navigator:

Then, select View UI Hierarchy:

Answer 3

I find it doesn't work on 32-bit Mac App Project