[SOLVED] How to create folder for save/get data in iOS by using widget code?

mkdh

Hi,

I can create folder on macbook pro and my android.
But I can't create the folder on my iPad.
I google it.
I find it is hard to create a folder in the out side of the self-app's folder .
Hence, I can't create the folder on the root.// It just my guest
below code is my current code.
How to fixed it?

    //get available folder
    QDir dir=QDir::rootPath();
    QString myPath=QDir::rootPath()+"sdcard";

    QDir* dir1=new QDir(myPath);
    if (!dir1->exists()) {
        dir1->mkpath(".");
    }
    if (dir.cd("sdcard")) {
        myPath=QDir::rootPath()+"sdcard";
        QDir* dir2=new QDir(myPath+"/MyFile");
        if (!dir2->exists()) {
            dir2->mkpath(".");
        }
        myPath+="/MyFile";
        dir.cd(myPath);
    }else{
        dir.cd("/Users/QQQ/Desktop/");
    }

SGaist

Hi,

You should use QStandardPaths::writableLocation to get a proper path to write to.

Marco Polo

Hi, I tried the same thing (or think it is the same more or less) and tried to use the path QStandardPaths::writableLocation(QStandardPaths::DataLocation)+"filename.txt"). But this does not work.
On android it was easier by using QDir::absolutePath()+"filename.txt". There has been created automatically such a file with this path, as there was no such one already before (so it worked).
Is there a way to do it with QDir or something similar? Or what exaxtly would I need if I used QStandardPaths? (because I also tried ...Paths::ApplicationsLocation, ::DocumentsLocation)

I hope you understand my problem.

SGaist

Hi,

Aren't you missing a separator ? i.e. QStandardPaths::writableLocation(QStandardPaths::DataLocation) + "/filename.txt"

Marco Polo

I already tried it and tried it now again. Does not work unfortunately.
The path it gave me (when I used qDebug() << file.fielname) was:
/var/mobile/Applications/262093E8-F9A7-4624-9559-FB3C6BF393E5/Library/Application Support/filename.txt
Maybe the problem is that there is a space between Application and Support?

SGaist

No, that should not be a problem. What error do you get from your file ?

Marco Polo

Well, the interesting thing is that I get no error, I only see that the data has not been saved after I restarted the app. What path would I use with qrc? Because I also tried it with that => path ":/data/filename.txt", that is the path qt also tells I should take, but this works only if I run it on my mac. Do I have to include something in the .pro file?

SGaist

Just to be sure I understand you correctly, do you want to read a file from qrc and store it on the device ?

Marco Polo

yes, but I also like the other version if the data can be saved (sorry my english migth be unclear sometimes, I'm from switzerland)

SGaist

No no, your english is not that bad, it was just to confirm I understood you correctly.

Since it's on iOS you may have to use the Q_INIT_RESOURCE macro to make your resources accessible.

Marco Polo

Ok, I see it should work with that, but what line exactly do I have to add in main.cpp when I have Resources=>data.qrc=>/=>Database.txt or the "normal" path :/Database.txt? Because I tried many lines again and don't know where the error is.

SGaist

IIRC:

Q_INIT_RESOURCE(data);

And then you can use the path like normal.

Marco Polo

I don't know why, but it works now, I inserted the line in the main.cpp, but used the QStandardPaths::... Thank you very much!

SGaist

qrc is a read-only system by design. Otherwise it would mean that you can rewrite your executable in place.

You're welcome !

By the way, no need to modify the title to mark the thread as solved, the "Topic Tool" button is there for that :)