Examples not build with Creator (4.10.0) or from command line, build output seems to look for file libanalogclock.xcodeproj (added 'lib', chopped last 'ect') when in build directory there is file analogclock.xcodeproject. If the .xcodeproject file is launched in xcode it is build and deployed fine, so all seems to be ok with the xcode build.
Does not reproduce with Qt5.13.0
Steps to reproduce:
Use online installer, install Qt5.13.1 iOS binaries (Preview node)
Finish installation and launch Creator
Pick any of the examples and build