feat: QtQMetaProperty

QtQMetaProperty/QtQMetaProperty.pro

@@ -0,0 +1,19 @@
+QT -= gui
+
+CONFIG += c++11 console
+CONFIG -= app_bundle
+
+# You can make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+        main.cpp
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target
+
+HEADERS += \
+    m.h

QtQMetaProperty/m.h

@@ -0,0 +1,16 @@
+#ifndef M_H //要使用元对象系统，需在头文件中定义类。
+#define M_H
+
+#include<QObject>
+#include <iostream>
+using namespace std;
+
+class Z:public QObject{
+    Q_OBJECT
+public:
+    Q_PROPERTY(int b READ gb WRITE sb)
+    int gb(){return m_mb;}
+    void sb(int x){m_mb=x;}
+    int m_mb;
+};
+#endif // M_H

QtQMetaProperty/main.cpp

@@ -0,0 +1,18 @@
+// 使用反射机制获取属性的信息
+// 使用 QMetaObject 成员函数存取属性值
+
+#include "m.h"
+#include<QMetaProperty>
+int main(int argc, char *argv[])
+{
+    Z mz;
+    const QMetaObject *p = mz.metaObject();
+    QMetaProperty pe = p->property(p->indexOfProperty("b"));
+
+    cout << pe.name()<< endl;
+    cout << pe.typeName()<< endl;
+    pe.write(&mz, 14);
+    cout << pe.read(&mz).value<int>()<<endl;  // pe 是主题，是一个具体的属性，类型为 int
+
+    return 0;
+}