Xcode Memory Debugging Icon Not Displaying

Question

I recently started working on an existing objc project and wanted to test the memory graph debugging tool. When I started the debugger using the application, I realized that it is not displayed in the debugging tools.

I tried this with another project (created a new quick project) and the icon suddenly appeared again. But only for this project.

So, now my question is: are there any settings in a particular project that may interfere with the display of the graphical debugging tool?

Any hints are welcome. I tried many different simulators (iOS 9/10/11). The event I tried to restart my macbook because I read that this might help; -)

I am only using an objc project with Xcode 9.1 or Xcode 9.2 beta 2.

This is my choice of diagnosis in the circuit if this is related:

Answer 1

Step 1: Turn off and restart the iPhone. Step 2: open and run Xcode again.

This will bring up a button.

Answer 2

For some reason, the button does not exist when I test the device, but it is there when I test on the simulator.

Answer 3

It seems that the memory debugger will only work for new devices. It definitely appears on the iPhone 8 running iOS 11. On some of my older devices, it does not appear. Currently, I'm not sure what a cutoff is.