Qt How to send string between multiwindows

[Tofu_panda]

thing is I have a three screen first is main screen second is password third is setting
So I made pushbotton when click need password then setting page will come up
So I don't know how to make the String which typed in setting screen to be sent to main page
I dont want to use like MainWindow *mian = new MainWindow
I hope it can keep the mainwindow

[VRonin]

This question has now been asked 75891677409385038 times here.

• If the dialog is modal call QDialog::exec from mainwindow and if it returns QDialog::Accepted use getters you create in the dialog to access the relevent information.
• If the dialog is modless create a signal connected to a slot in the mainwindow and use its arguments to pass the data around

[Tofu_panda]

@VRonin Thanks for your reply I try the following code:

connect(send,SIGNAL(sendData(QString)),this,SLOT(receiveData(QString)));

and my emit is :
void sending::on_pushButton_clicked()
{
QString data1= ui->lineEdit->text();
emit(sendData("data1"));
this->close();

qDebug("clicked");

}

this is noting wrong in it but not work
could you do me a favor to look at this ??

[VRonin]

@Tofu_panda said in Qt How to send string between multiwindows:

this is noting wrong

@Tofu_panda said in Qt How to send string between multiwindows:

emit(sendData("data1"));

[Tofu_panda]

thanks for your reply I tried to use emit(sendData(data1));
still not working

[VRonin]

Could you define "not working". does it crash? does it fail to compile? etc.
Did you check your connect statement is correct? either by putting Q_ASSUME() around it or using Qt5 connect syntax?

[Taz742]

@Tofu_panda
pls show your full code

[Vinod Kuntoji]

@Tofu_panda ,

You should use,
emit sendData(data1);