Qt:如何使用registerField()传递变量值betweeen QWizardPages

I'm working on Qt 4.8.5. I'm using a QWizard structure with its QWizardPages (lets name them wp1, wp2, wp3,...). I need to pass one value from wp2 to wp4 but every time I try it, I get an empty string :( The value I need is on a variable (QString sVar;) so not a widget and I've tried some things:I'm working on Qt 4.8.5. I'm using a QWizard st