小编Bas*_* An的帖子

我有一个Loader加载另一个qml 的QML

Loader { id: gaugeLoader }

PieMenu {
    id: pieMenu

    MenuItem {
        text: "Add Bar Gauge"
        onTriggered: gaugeLoader.source = "qrc:/Gauges/horizontalBarGauge.qml"
    }
    MenuItem {
        text: "Action 2"
        onTriggered: print("Action 2")
    }
    MenuItem {
        text: "Action 3"
        onTriggered: print("Action 3")
    }
}

我如何可以传递参数来设置ID,width,height等加载的QML的？

我正在使用返回字节数组的串行设备。该数组中的值存储在无符号短整型和无符号字符中。我有以下结构：

    typedef struct {
    unsigned short RPM;             //0
    unsigned short Intakepress;     //1
    unsigned short PressureV;       //2
    unsigned short ThrottleV;       //3
    unsigned short Primaryinp;      //4
    unsigned short Fuelc;           //5
    unsigned char Leadingign;       //6
    unsigned char Trailingign;      //7
    unsigned char Fueltemp;         //8
    unsigned char Moilp;            //9
    unsigned char Boosttp;          //10
    unsigned char Boostwg;          //11
    unsigned char Watertemp;        //12
    unsigned char Intaketemp;       //13
    unsigned char Knock;            //14
    unsigned char BatteryV;         //15
    unsigned short Speed;           //16
    unsigned short Iscvduty;        //17
    unsigned char O2volt;           //18 …

我有以下 JSonArray 并想通过其“ID”搜索值。这里存储在 QJsonArray 中的 JSON：

{
   "datasources":[
   {"id":1, "name":"tps-pos",       "display-name":"TPS Position"},
   {"id":2, "name":"tps-timer",     "display-name":"TPS Timer"},
   {"id":3, "name":"laterial-g",    "display-name":"Lateral G"},
   {"id":4, "name":"longitudal-g",  "display-name":"Longitudal G"},
   {"id":5, "name":"Z",             "display-name":"Z"},
   {"id":6, "name":"afr",           "display-name":"AFR"},
   {"id":135, "name":"IAT",         "display-name":"Intake Air temperature"},
   {"id":179, "name":"RPM",         "display-name":"RPM"}
]}

我尝试了 std:find ，其中 m_list 包含应该在 JSON 中找到的 ID。

auto result = std::find(m_DataSourceArray.begin(),m_DataSourceArray.end(), m_list[0]);

调试时，我看到“结果”总是与 m_DataSourceArray + 字段迭代器相同：（调试器视图：）

result  @0x7ed9e0   QJsonArray::iterator
    a   <8 Elemente>    QJsonArray
        [0] <3 Elemente>    QJsonValue (Object)
        [1] <3 Elemente>    QJsonValue (Object)
        [2] <3 Elemente>    QJsonValue (Object)
        [3] <3 …