My application crashes

[spirit]

So I think it will work if I use the ISO C++ dynamic_cast or static_cast.
The doc says the qobject_cast does not require RTTI.
what do you think is not suitable if we use dynamic_cast or static_cast?

for objects which inherit from QObject it's better to use qobject_cast.

By the way, you get up so early!!

my local time is 09:09 am