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我正在嘗試爲我的項目爲QML創建一個自定義TCP小部件（WebSocket發送HTTP請求，它不允許我發送原始TCP數據包） 。我創建了「TCPSocketConnection」（在cpp中命名爲TCPSocketConn）類，並使用佔位符方法給它一些屬性，並試圖將它插入到QML中。當我試圖使用類，我收到以下錯誤Qt - 不能分配給不存在的屬性（自定義C++類）
qrc:/qml/qmlwebsocketclient/main.qml:43:9: Cannot assign to non-existent property "onTextMessageReceived"
我有這樣
****************************************************************************/
import QtQuick 2.0
import QtWebSockets 1.0
import Qt.Comm 2.0
Rectangle {
width: 360
height: 360
TCPSocketConnection{
id: socket
url: "ff"
onTextMessageReceived: {
console.log("On Recieve: " + messsage)
}
}
}
一個QML文件的TCPSocketConnection被定義爲tcpsocketconn如下
qmlRegisterType<TCPSocketConn>("Qt.Comm", 2, 0, "TCPSocketConnection");
。 h
#ifndef TCPSOCKETCONN_H
#define TCPSOCKETCONN_H
#include <QQuickItem>
class TCPSocketConn : public QQuickItem
{
Q_PROPERTY(QString url READ url WRITE a_1 NOTIFY a_2)
Q_PROPERTY(QString message READ message WRITE a_3 NOTIFY textMessageRecieved)
Q_PROPERTY(int status READ status WRITE a_4 NOTIFY statusChanged)
public:
explicit TCPSocketConn(QQuickItem *parent = 0);
QString url();
QString message();
int status();
signals:
void a_2();
void textMessageReceived();
void statusChanged();
public slots:
void a_1(QString);
void a_3(QString);
void a_4(int);
};
#endif // TCPSOCKETCONN_H
用佔位符cpp文件
#include "tcpsocketconn.h"
TCPSocketConn::TCPSocketConn(QQuickItem *parent) : QQuickItem(parent)
{
}
QString TCPSocketConn::url(){
return "";
}
QString TCPSocketConn::message(){
return "";
}
int TCPSocketConn::status(){
return 0;
}
void TCPSocketConn::a_1(QString d){
}
void TCPSocketConn::a_3(QString d){
}
void TCPSocketConn::a_4(int s){
}
void TCPSocketConn::textMessageReceived(){
}
void TCPSocketConn::statusChanged(){
}
void TCPSocketConn::a_2(){
}