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Thread: How to install Qjson in mac

  1. #1
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    Default How to install Qjson in mac

    Hi,

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

    Thanks in advance

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    Default Re: How to install Qjson in mac

    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  3. #3
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    Default Re: How to install Qjson in mac

    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.

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    Default Re: How to install Qjson in mac

    Use a 64-bit version of Qt or build the application using a 32-bit compiler.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  5. The following user says thank you to wysota for this useful post:

    Girija (14th September 2010)

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    Default Re: How to install Qjson in mac

    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

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    Default Re: How to install Qjson in mac

    So what did you already try?
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

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    Default Re: How to install Qjson in mac

    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).

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    Default Re: How to install Qjson in mac

    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.

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    Default Re: How to install Qjson in mac

    Thanks. I am trying this one.

    Could you explain little bit more?

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    Default Re: How to install Qjson in mac

    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.

    Qt Code:
    1. QVariant result = parser.parse (cityReply->readAll(), &ok);
    2.  
    3. if (result.canConvert<QMap>()) {
    4. QVariantMap resultMap = result.toMap();
    5. } else {
    6. qDebug() << "Can not convert to a map.";
    7. }
    To copy to clipboard, switch view to plain text mode 

  12. #11
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    Default Re: How to install Qjson in mac

    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?

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    Default Re: How to install Qjson in mac

    How are you calling canConvert?
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  14. #13
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    Default Re: How to install Qjson in mac

    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

  15. #14
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    Default Re: How to install Qjson in mac

    What compiler are you using? MSVC6? Unlikely (it seems you are on a Mac), so it should be working. Is this your exact code?
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

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  16. #15
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    Default Re: How to install Qjson in mac

    yes .. This is my exact code.

  17. #16
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    Default Re: How to install Qjson in mac

    It should be:
    Qt Code:
    1. result.canConvert<QVariantMap>()
    To copy to clipboard, switch view to plain text mode 
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  18. #17
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    Default Re: How to install Qjson in mac

    Hi,

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

    is there any other option?

  19. #18
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    Default Re: How to install Qjson in mac

    Maybe the library simply can't parse your string.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

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  20. #19
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    Default Re: How to install Qjson in mac

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

    Thanks in advance.

  21. #20
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    Default Re: How to install Qjson in mac

    Parse it yourself.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

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