Qt Load and Save Image Dialog 加载图片对话框

QString fileName = QFileDialog::getOpenFileName(this,
tr("Load Image"), "",
tr("Images (*.png *.bmp *.jpg *.tif *.GIF);;All Files (*)"));
if (fileName.isEmpty()) {
return;
}
QImageReader reader(fileName);
const QImage newImage = reader.read();
if (newImage.isNull()) {
QMessageBox::information(this, QGuiApplication::applicationDisplayName(),
tr("Cannot load %1: %2")
.arg(QDir::toNativeSeparators(fileName), reader.errorString()));
return;
}
const QPixmap pix = QPixmap::fromImage(newImage);
ui.imgLable->setPixmap(pix.scaled(size,Qt::IgnoreAspectRatio)));

QString fileName = QFileDialog::getSaveFileName(this,
tr("Save Image"), "",
tr("Images (*.png *.bmp *.jpg *.tif *.ppm *.GIF);;All Files (*)"));
if (fileName.isEmpty()) {
return;
}
image0.save(fileName);