Qt 接受/拒绝未捕获对话框的信号
将Qt升级到v5.10.1该对话框不会发出接受/拒绝信号。上一个已知的运行平稳的版本是5.10.0。我的问题是——我是否遗漏了一些东西,或者我以错误的方式使用了某些组件?或者是回归(我会报告它?) macOS 10.12+和Win10上转载的问题(VC 2015/2017) 简化源代码示例: CMakeLists.txtQt 接受/拒绝未捕获对话框的信号,qt,qml,qt5,qtquickcontrols2,Qt,Qml,Qt5,Qtquickcontrols2,将Qt升级到v5.10.1该对话框不会发出接受/拒绝信号。上一个已知的运行平稳的版本是5.10.0。我的问题是——我是否遗漏了一些东西,或者我以错误的方式使用了某些组件?或者是回归(我会报告它?) macOS 10.12+和Win10上转载的问题(VC 2015/2017) 简化源代码示例: CMakeLists.txt cmake_minimum_required(VERSION 3.11) project(bug-test LANGUAGES CXX) set(CMAKE_INCLUDE_
cmake_minimum_required(VERSION 3.11)
project(bug-test LANGUAGES CXX)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
find_package(Qt5 COMPONENTS Core Quick REQUIRED)
add_executable(${PROJECT_NAME} "main.cpp" "qml.qrc")
target_link_libraries(${PROJECT_NAME} Qt5::Core Qt5::Quick)
main.cpp
#include <QGuiApplication>
#include <QQmlApplicationEngine>
int main(int argc, char *argv[])
{
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
if (engine.rootObjects().isEmpty()) return -1;
return app.exec();
}
MsgDialog.qml
import QtQuick 2.9
MsgDialogForm {
x: (parent.width - width) / 2
y: (parent.height - height) / 2
width: Math.min(applicationWindow.width, applicationWindow.height) / 5 * 4
onAccepted: console.log("Ok clicked; save answer")
onRejected: console.log("Cancel clicked; don't save")
}
MsgDialogForm.ui.qml
import QtQuick 2.9
import QtQuick.Controls 2.3
Dialog {
id: dialog
modal: true
standardButtons: Dialog.Yes | Dialog.No
closePolicy: Popup.CloseOnEscape
}
qml.qrc
<RCC>
<qresource prefix="/">
<file>main.qml</file>
<file>qtquickcontrols2.conf</file>
<file>MsgDialog.qml</file>
<file>MsgDialogForm.ui.qml</file>
</qresource>
</RCC>
main.qml
qtquickcontrols2.conf
MsgDialog.qml
MsgDialogForm.ui.qml
只需启动应用程序;按下按钮并单击其中一个对话框按钮。QtCreator控制台中未显示任何内容,但对话框已关闭。当在
加载程序中建立新项目时,会从内存中删除上一个项目,在您的情况下,您是在关闭窗口时执行此操作的,但在关闭窗口后会发出接受或拒绝的信号
一种可能的解决方案是创建一个在接收到消息后发出的信号
MsgDialog.qml
import QtQuick 2.9
MsgDialogForm {
signal finished()
x: (parent.width - width) / 2
y: (parent.height - height) / 2
width: Math.min(applicationWindow.width, applicationWindow.height) / 5 * 4
onAccepted: {
console.log("Ok clicked; save answer")
finished()
}
onRejected: {
console.log("Cancel clicked; don't save")
finished()
}
}
...
Connections {
target: dlgLoader.item
onFinished: dlgLoader.source = ""
}
main.qml
import QtQuick 2.9
MsgDialogForm {
signal finished()
x: (parent.width - width) / 2
y: (parent.height - height) / 2
width: Math.min(applicationWindow.width, applicationWindow.height) / 5 * 4
onAccepted: {
console.log("Ok clicked; save answer")
finished()
}
onRejected: {
console.log("Cancel clicked; don't save")
finished()
}
}
...
Connections {
target: dlgLoader.item
onFinished: dlgLoader.source = ""
}