Problem accesing widgets

[faldzip]

void accion() {
	QString text = ui->direccionLE->text();
 
}

void accion() {
	QString text = ui->direccionLE->text();

}

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You are defining here a global finction wich has nothing to do with your class Cliente.

You should do it like this:

void Cliente::accion() {
	QString text = ui->direccionLE->text();
}

void Cliente::accion() {
	QString text = ui->direccionLE->text();
}

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Notice that "Cliente::" before "accion()", in simple way - it's necessary to tell that your accion() is from Cliente class (I hope you declared it in class declaration...)

Anyway, these are basics of C++ language so get some C++ book/tutorial.