C++ 将base64转换为QImage的Qt返回null
我有问题。我必须将base64转换为QImage,但之后的图像总是空的。以下是代码:C++ 将base64转换为QImage的Qt返回null,c++,image,qt,base64,converter,C++,Image,Qt,Base64,Converter,我有问题。我必须将base64转换为QImage,但之后的图像总是空的。以下是代码: void convertAll(QString path) { QDir *dir = new QDir(path); QDirIterator *iter = new QDirIterator(*dir); QVector<QFile*> files; QTextStream cout(stdout); cout << "Finding fi
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;
}
void convertAll(QString路径)
{
QDir*dir=新的QDir(路径);
QDirIterator*iter=新的QDirIterator(*dir);
矢量文件;
QTextStream cout(stdout);
cout hasNext())
{
iter->next();
如果(iter->fileInfo().completeSuffix()=“txt”)
push_back(新的QFile(iter->filePath());
}
删除国际热核实验堆;
无法打开(QIODevice::只读);
QTextStream流(文件);
cout isNull())
{
我用这个简单的例子试了一下,它在我的机器上运行
QByteArray txt = "iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADxSURBVFhH7ZSxDYMwEEW9RdqU9MhFOho6WrwAE0SsESGlyABpvEU2yB5ZItLFnG1kkJEgipUjuSdZWG78+HdnwTAMAR73J7gtXTYjOSd61Wc6PxCTJCXYM5X8muDldJi9OJQkKdjj+5KsoGcTgrHhSc5PJei2iVA1qNvRrBoyIYbLiAjmUBi5Sjc0BbPOJKdL2LVG0HzdMbJEMG16WNoGpBQUBW1pC2VLikl2OR3BqRAtQSzteCBigkv4vKAsoQpK65HaTHK7JyA4vHnxtVYy4ZCEjAdmDSyIYF/a99CdLCaxoE0u7MF3UmQYhmGYv0SIF0Zn9rmd3QoAAAAAAElFTkSuQmCC";
QPixmap image;
image.loadFromData(QByteArray::fromBase64(txt));
ui->label->setPixmap(image);
我发现了我的错误,谢谢。