I have downloaded
qt-opensource-mac-x64-android-ios-5.3.1_2014-06-11_17-40-44-78.dmg (dated June 12)
Apparently the kit fro iOS is not working (small icon stay red (whit a connected device). In addition Run and Start Debugging never turn to green (they stay grey).
This happens even with a "minimal" Qt Widget Application project.
With e.g. Qt 5.3.0 official release it works