qt - 对全局属性 QML 的写入无效

Question

我有这个信号

class SystemUICfgScanner 
{
    /*code here*/
signals:
    void error(QString desc);
    /*more code*/
};

在 QML 中，我以这种方式使用 InfoBanner:

InfoBanner
{
    property string infodetails: ""
    id: systemuicfgErrorBanner
    text: "Error: " + infodetails
    Connections
    {
        target: cfgScanner
        onError: infodetails = desc
    }
}

当发出 error(QString) 信号时，我收到此错误

Invalid write to global property "infodetails"

我究竟做错了什么？

提前致谢

Answer 1

尝试引用InfoBanner id 实例:

InfoBanner
{
    property string infodetails: ""
    id: systemuicfgErrorBanner
    text: "Error: " + infodetails
    Connections
    {
        target: cfgScanner
        onError: systemuicfgErrorBanner.infodetails = desc
    }
}