我有問題。我必須將base64轉換爲QImage,但在該圖像始終爲空之後。這裏的代碼:Qt將base64轉換爲QImage返回null
void convertAll(QString path)
{
QDir *dir = new QDir(path);
QDirIterator *iter = new QDirIterator(*dir);
QVector<QFile*> files;
QTextStream cout(stdout);
cout << "Finding files...\n";
cout.flush();
while (iter->hasNext())
{
iter->next();
if (iter->fileInfo().completeSuffix() == "txt")
files.push_back(new QFile(iter->filePath()));
}
delete iter;
cout << "Converting files to images...\n";
cout.flush();
foreach (QFile *file, files)
{
QString filename = QFileInfo(*file).fileName();
filename.remove(".txt");
file->open(QIODevice::ReadOnly);
QTextStream stream(file);
cout << "Reading file...\n";
cout.flush();
QByteArray base64Data = stream.readAll().toUtf8();
cout << "Reading is completed!\n";
cout.flush();
file->close();
QImage *image = new QImage();
cout << "Converting...\n";
cout.flush();
image->loadFromData(QByteArray::fromBase64(base64Data), "GIF");
if (!image->isNull())
{
cout << "Converting is completed! Saving...\n";
cout.flush();
}
else
{
cout << "Error converting to image!\n\n";
cout.flush();
delete image;
delete file;
continue;
}
if (image->save("/home/prosperis/ProgramFiles/Content/" + filename + ".bmp", "BMP"))
{
cout << "Saved successful!\nFile " << filename << ".bmp has been made!\n\n";
cout.flush();
}
else
{
cout << "Error saving the file!\n\n";
cout.flush();
}
delete image;
delete file;
}
delete dir;
}
截圖與結果:
Base64的例子:
數據:圖像/ GIF; BASE64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADxSURBVFhH7ZSxDYMwEEW9RdqU9MhFOho6WrwAE0SsESGlyABpvEU2yB5ZItLFnG1kkJEgipUjuSdZWG78 + HdnwTAMAR73J7gtXTYjOSd61Wc6PxCTJCXYM5X8muDldJi9OJQkKdjj + 5KsoGc TgrHhSc5PJei2iVA1qNvRrBoyIYbLiAjmUBi5Sjc0BbPOJKdL2LVG0HzdMbJEMG16WNoGpBQUBW1pC2VLikl2OR3BqRAtQSzteCBigkv4vKAsoQpK65HaTHK7JyA4vHnxtVYy4ZCEjAdmDSyIYF/a99CdLCaxoE0u7MF3UmQYhmGYv0SIF0Zn9rmd3QoAAAAAAElFTkSuQmCC
而且它不會,如果我刪除data:image/gif;base64,
我發現我的錯誤。謝謝。 – Vlad