[SOLVED] How to reuse QFile in multiple functions/methods
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Hi,
How can I make a QFile visible in multiple functions/methods? In other words I would like to create a QFile and be able to use the same name in multiple places, for instance the save and load functions.
I have tried...
.h
@private:
QFile myFile(QString);@.cpp
@//constructor
myFile("/Users/userName/someFile.txt");@later in the program
@if (myFile.open(QIODevice::WriteOnly))
...
@
Which of course doesn't work, I know this has to do with my poor understanding of the language C++.Thanks a lot
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Hi,
did you check what error you have ?
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Error!
undefined reference to 'MainWindow::myFile(QString)Is it even possible to have a QFile globally visible? Sorry if my original question doesn't make any sense I just don't like to be repeating the same code over an over.
I know I could use a string variable to hold the path and then just reuse the string but still doesn't feel right.
.h File
@#include <QFile>
QString fileName;@.cpp File
@#include <QFile>
// cosntructor
fileName = "/Users/userName/someFile.txt";@@// later in the program
QFile myFile(fileName);@How do you guys usually do this?
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I just re-read your code
@
private:
QFile myFile(QString);
@is not valid.
@
private:
QFile myFile;
@is
and in your constructor:
@
myFile.setFileName("path_to_file");
@EDIT: corrected sleepy head error
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First of all thank you for your reply.
When I do what you suggested I get the following message
'operator=' is a private member of 'QFile'
Any Idea what could be wrong?
@private:
QFile mainDataFile;@@// constructor
mainDataFile = QFile("/Users/UserName/someFile.txt");@@// later in the program
if (mainDataFile.open(QIODevice::WriteOnly))@
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@
MainWindow::MainWindow(...): mainDataFile (QFile("/Users/UserName/someFile.txt"))
{
}
@or
@
mainDataFile.setFileName("/Users/UserName/someFile.txt");
@
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[quote author="1+1=2" date="1377656296"]@
MainWindow::MainWindow(...): mainDataFile (QFile("/Users/UserName/someFile.txt"))
{
}
@
[/quote]won't work either, the copy constructor as well as the assignment operator are private (QFile's a QObject)
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@private:
QFile myFile;@
@// Constructor
myFile.setFileName("path_to_file");@This works, thanks a lot for your help.
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You're welcome !
Please update the thread's title prepending solved so other forum users may know an answer has been found :)
