QSettings :: IniFormat values with“，”返回为QStringList [英] QSettings::IniFormat values with "," returned as QStringList

问题描述

我使用 QSettings 来解析一个ini文件： QSettings cfg（path，QSettings :: IniFormat）;

I am using QSettings to parse an ini file: QSettings cfg(path, QSettings::IniFormat);

当我获得一个值 QVariant qv = cfg.value（title）; 包含 QStringList 而不是 QString

When I obtain a value QVariant qv = cfg.value("title"); containing a comma the variant contains a QStringList instead of a QString

title=foo => QString
title=foo,bar => QStringList

如何始终获取字符串，或至少获取原始行（ title = foo，bar ）？

How can I always get strings, or at least obtain the original line ( title=foo,bar ) ?

推荐答案

，所有这些都显示如下：

You have at least two ways to address this issue, all of them presented below:

title="foo,bar"
title_unquoted=foo,bar

main.cpp

main.cpp

#include <QSettings>
#include <QDebug>

int main()
{
    QSettings settings("test.ini", QSettings::IniFormat);
    // Original issue
    qDebug() << settings.value("title_unquoted");
    // 1st solution: join the strings
    qDebug() << settings.value("title").toStringList().join(',');
    // 2nd solution: use quotes in the ini file
    qDebug() << settings.value("title");
    return 0;
}

main.pro

main.pro

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

构建和运行

Build and Run

qmake && make && ./main

输出

Output

QVariant(QStringList, ("foo", "bar"))
"foo,bar"
QVariant(QString, "foo,bar")

换句话说，对包含特殊字符的字符串使用引号，或者在列表中手动连接字符串。前者是更好的，如果它在你的控制下，因为你通常应该瞄准在字符串中使用特殊字符正确的引用。

In other words, use quotes for strings with special characters or join the strings manually in the list. The former is far better if it is under your control as you usually ought to aim for proper quoting when using "special" characters in strings.

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