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我在我的MainWindow中发出一个信号,以便在行编辑中发出一个数字。当我点击一个按钮打开对话框时,我希望将该编号复制到对话框中的行编辑中。我无法连接它。我可以看到qDebug发出的信号。我连接错了还是错了吗?我尝试了很多方法。这里是我的代码片段。如何将信号从MainWindow连接到对话框中的插槽
主窗口
//My MainWindow
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) {
ui->setupUi(this);
//This is the number I am trying to send to the dialog
ui->checkingAmount->setText(QString::number(1000.00, 'f', 2));
ui->checkingAmount->setReadOnly(true);
}
//Emit the data here
void MainWindow::on_transferButton_clicked() {
transferWindow = new TransferWindow(this);
transferWindow->show();
//trying to emit the data
QString data =ui->checkingAmount->text();
emit shareCheckingData(data);
qDebug()<<"emitting mainwin amount";
}
对话框
//My Dialog
TransferWindow::TransferWindow(QWidget *parent) : QDialog(parent),ui(new Ui::TransferWindow) {
ui->setupUi(this);
//I have tried several variations of this
//mainWindow = new MainWindow();
connect(mainWindow, SIGNAL(shareCheckingData(QString)),this, SLOT(getAmountFromMainWin(QString)));
}
//Here is the connecting slot to get the data from main window
void TransferWindow::getAmountFromMainWin(QString n) {
float CheckTotal = n.toFloat();
ui->checkingAmount->setReadOnly(true);
ui->checkingAmount->setText(QString::number(CheckTotal));
qDebug()<<"setting amount";
}
我如何能得到这个连接?我阅读了很多帖子,但没有解决问题。谢谢。
谢谢eyllanesc。你曾多次帮助过我。我很感激。 – equati0n