It is not possible to debug on IOS Simulator 9.2 using Qt Creator 5.5.1.
I tried a little bit on Qt 5.6 beta (but it always blows away my kit settings on 5.5.1 when I switch over and switch back)
Included is a sample project. (Testbase)
And a youtube video link to demonstrate the problem.
Basically, the splash screen on IOS get stuck when trying to debug the app.
Here is a youtube video link.