Qt Progressbar百分比问题

Question

我想在下载文件时显示进度条百分比。下载文件时，我得到 64%，而不是 100%。如何解决这个问题？提前致谢。

void Updates::UpdateProgress(qint64 bytesRead, qint64 totalBytes) 
{
    int totalSize = totalBytes / 1024 / 1024;
    int totalMBReceived = bytesRead / 1024 / 1024;

    ui->progressBar->setMaximum(totalSize);
    ui->progressBar->setValue(totalMBReceived);

    int progressPercentage = (totalSize * totalMBReceived) / 100;
    qDebug() << progressPercentage;

    ui->label->setText(QString::number(progressPercentage).append("%"));
    ui->label_4->setText(QString::number(totalSize).append(" MB") + " / " + QString::number(totalMBReceived).append(" MB"));
}

Answer 1

您的progressPercentage计算有误。在 100% 时，您完成了 80*80/100 = 64.

改为

int progressPercentage = (totalMBReceived * 100) / totalSize;

Qt Progressbar百分比问题

Qt Progressbar percentage issue

qt

windows-applications

qprogressbar