问题描述
我想从本地获取 json 文件并使用此将其发送到 QML:
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
int main(int argc,char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6,0)
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif
QGuiApplication app(argc,argv);
QQmlApplicationEngine engine;
const QUrl url(QStringLiteral("qrc:/main.qml"));
engine.rootContext()->setContextProperty("text_json","{\"text1\": \"Loading\"}");
QObject::connect(
&engine,&QQmlApplicationEngine::objectCreated,&app,[url](QObject *obj,const QUrl &objUrl) {
if (!obj && url == objUrl)
QCoreApplication::exit(-1);
},Qt::QueuedConnection
);
engine.load(url);
return app.exec();
}
但它说 QQmlEngine::setContextForObject(): Object already has a QQmlContext
但我不明白该默认文件中的任何内容。
从现在开始我什么也没找到。
-- 添加 Main.qml --
import QtQuick 2.15
import QtQuick.Controls 2.15
ApplicationWindow {
id: window
width: 640
height: 480
visible: true
title: qsTr("Stack")
property var text_json: ({"text1": "Loading"})
header: ToolBar {
contentHeight: toolButton.implicitHeight
ToolButton {
id: toolButton
icon.source: "./images/ruby.png"
font.pixelSize: Qt.application.font.pixelSize * 1.6
onClicked: {
drawer.open()
}
}
Label {
text: stackView.currentItem.title
anchors.centerIn: parent
}
}
}
解决方法
可能有点晚了,但是您是否尝试在没有版本号的 Main.qml 中导入?
import QtQuick
import QtQuick.Controls