How to install Qjson in mac

[Girija]

Hi,

I am a very new to this one. How to install QJson in mac

Thanks in advance

[wysota]

What did you already try?

http://qjson.sourceforge.net/get_it/unix.html

[Girija]

Thanks. But it shows the error : "You are building a 64-bit application, but using a 32-bit version of Qt. Check your build configuration." please help me.

[wysota]

Use a 64-bit version of Qt or build the application using a 32-bit compiler.

[Girija]

Hi,

thank you very much.. My json output look like [{"id":2,"name":"AAA"},{"id":1,"name":"BBB"}]. I want to parse this using Qjson in mac. I am trying to parsing but I could not get any outputs . please help me.

Thanks in advance

[wysota]

So what did you already try?

[Girija]

I am using the following code,
QJson::Parser parser;
bool ok;
QVariantMap result = parser.parse (cityReply->readAll(), &ok).toMap();
if (!ok) {
qFatal("An error occurred during parsing");
exit (1);
}
qDebug() << "Name :" << result.value("name").toString();

}
the output is : Name : ""

Note : if I displays cityReply->readAll() in messagebox then I can view the webservice result (json String).

[tbscope]

Your map is empty.

About the toMap() function:

Returns the variant as a QMap<QString, QVariant> if the variant has type() Map; otherwise returns an empty map.

Check with canConvert.

[Girija]

Thanks. I am trying this one.

Could you explain little bit more?

[tbscope]

I browsed the QJson website a little.
You should be able to convert the variant to a map, but it's always a good idea to check first.

QVariant result = parser.parse (cityReply->readAll(), &ok);
 
if (result.canConvert<QMap>()) {
    QVariantMap resultMap = result.toMap();
} else {
    qDebug() << "Can not convert to a map.";
}

QVariant result = parser.parse (cityReply->readAll(), &ok);

if (result.canConvert<QMap>()) {
    QVariantMap resultMap = result.toMap();
} else {
    qDebug() << "Can not convert to a map.";
}

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[Girija]

Thanks . But I am getting the error "error: no matching function for call to 'QVariant::canConvert()'.
Is it possible to convert the QByteArray to QMap?

[wysota]

How are you calling canConvert?

[Girija]

I am using the following code,

QVariant result = parser.parse (cityReply->readAll(), &ok);

if (result.canConvert<QMap>()) {
QVariantMap resultMap = result.toMap();
} else {
qDebug() << "Can not convert to a map.";
}

Please point out any mistakes

[wysota]

What compiler are you using? MSVC6? Unlikely (it seems you are on a Mac), so it should be working. Is this your exact code?

[Girija]

yes .. This is my exact code.

[wysota]

It should be:

result.canConvert<QVariantMap>()

result.canConvert<QVariantMap>()

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[Girija]

Hi,

I could not convert the Json result into QVarientMap.
The canConvert function returns false value.

is there any other option?

[wysota]

Maybe the library simply can't parse your string.

[Girija]

could you please tell me other options for solve this one?

Thanks in advance.

[wysota]

Parse it yourself.