qpushButton 设置网络图片-QT开发中文网

在Qt中，可以通过QNetworkAccessManager和QNetworkReply类来获取网络图片并显示到QPushButton上。具体步骤如下：

创建QNetworkAccessManager实例。

QNetworkAccessManager *manager = new QNetworkAccessManager(this);

发送GET请求获取网络图片。

QUrl url("https://example.com/image.png");
QNetworkRequest request(url);
QNetworkReply *reply = manager->get(request);
connect(reply, &QNetworkReply::finished, this, [=]() {
    if (reply->error() == QNetworkReply::NoError) {
        // 读取数据
        QByteArray data = reply->readAll();
        // 显示图片
        QPixmap pixmap;
        pixmap.loadFromData(data);
        ui->pushButton->setIcon(QIcon(pixmap));
    } else {
        qDebug() << "Download failed:" << reply->errorString();
    }
    reply->deleteLater();
});

在QPushButton上显示图片。

ui->pushButton->setIconSize(ui->pushButton->size());
ui->pushButton->setFlat(true); // 去除边框样式

完整示例代码：

void MainWindow::on_pushButton_clicked()
{
    QUrl url("https://example.com/image.png");
    QNetworkRequest request(url);

    QNetworkAccessManager *manager = new QNetworkAccessManager(this);
    QNetworkReply *reply = manager->get(request);

    connect(reply, &QNetworkReply::finished, this, [=]() {
        if (reply->error() == QNetworkReply::NoError) {
            QByteArray data = reply->readAll();
            QPixmap pixmap;
            pixmap.loadFromData(data);
            ui->pushButton->setIcon(QIcon(pixmap));
            ui->pushButton->setIconSize(ui->pushButton->size());
            ui->pushButton->setFlat(true);
        } else {
            qDebug() << "Download failed:" << reply->errorString();
        }
        reply->deleteLater();
    });
}

注意：以上示例代码仅供参考，实际应用中需要根据具体需求进行修改和完善。同时，要注意图片的版权问题，确保使用的图片没有侵犯他人的知识产权。