Getting paths of qrc files in Qt

问题

I want to know how to access the paths of files in the qrc file in order to use them as strings in an array. An example of qrc file is:

   <!DOCTYPE RCC><RCC version="1.0">
    <qresource prefix="">
     <file>images/1.jpg</file>
     <file>images/2.jpg</file>
     <file>images/3.jpg</file>
     <file>images/4.jpg</file>
    </qresource>
   </RCC>

I want to use it in the following manner:

   for(int i=0;i<4;i++)
   {
     path=image_path[i];
   }

where path is an qlist that can be later used for accessing the respective images.

回答1:

There seems to be a simple way of doing it using QDirIterator.

It might break if you have a directory called ":" in the current working directory and you expect that to be parsed instead in the future. Anyhow, that should not be a concern for now.

QStringList imageFileList;
QDirIterator dirIterator(":", QDirIterator::Subdirectories);
while (dirIterator.hasNext()) {
    QFileInfo fileInfo = it.fileInfo();
    if (fileInfo.isFile()) // Do not add directories to the list
        imageFileList.append(it.next());
}

Alternatively, this requires quite a bit of involvement, but I think it works. I am afraid there is no more convenient way as of writing this.

main.qrc

<!DOCTYPE RCC><RCC version="1.0">
 <qresource prefix="">
  <file>images/1.jpg</file>
  <file>images/2.jpg</file>
  <file>images/3.jpg</file>
  <file>images/4.jpg</file>
 </qresource>
</RCC>

main.cpp

#include <QXmlStreamReader>
#include <QString>
#include <QFile>
#include <QTextStream>

int main()
{
    QTextStream standardOutput(stdout);
    QFile file("main.qrc");
    if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
        standardOutput << "File open error:" << file.errorString() << "\n";
        return 1;
    }
    QXmlStreamReader inputStream(&file);
    while (!inputStream.atEnd() && !inputStream.hasError()) {
        inputStream.readNext();
        if (inputStream.isStartElement()) {
            QString name = inputStream.name().toString();
            if (name == "file")
                standardOutput << "file: :/" << inputStream.readElementText() << "\n";
        }
    }
    return 0;
}

main.pro

TEMPLATE = app
TARGET = main
QT = core
SOURCES += main.cpp

Build and Run

qmake && make && ./main

Output

file: :/images/1.jpg
file: :/images/2.jpg
file: :/images/3.jpg
file: :/images/4.jpg

来源：https://stackoverflow.com/questions/23844136/getting-paths-of-qrc-files-in-qt

标签

c++

qtcore

qxmlstreamreader

qresource