兼容Qt4/Qt5版本的QML例程
本篇文章介绍兼容Qt4与Qt5版本的Qml简单例程。由于Qt4与Qt5版本的qml文件不能使用宏来区分，所以使用qmake执行脚本来修改qml版本差异代码。(末尾源代码地址)
qml文件转换
- 下列代码是项目文件代码，会在编译之前执行;
- 主要作用为识别Qt版本然后替换对应qml文件中的
importQtQuick1.x或importQtQuick2.x;
equals(QT_MAJOR_VERSION, 4) {
equals(QT_MINOR_VERSION, 7): QT_QUICK_VERSION = 1.0
equals(QT_MINOR_VERSION, 8): QT_QUICK_VERSION = 1.1
}
equals(QT_MAJOR_VERSION, 5): QT_QUICK_VERSION = 2.$${QT_MINOR_VERSION}
macx {
!isEmpty(QT_QUICK_VERSION):
QtQuickVersion.commands +=
"grep -rl 'QtQuick [0-9]\\.[0-9]' $$PWD/ | xargs sed -i '' 's/QtQuick [0-9]\\.[0-9]/QtQuick $${QT_QUICK_VERSION}/g';"
}
unix:!macx {
!isEmpty(QT_QUICK_VERSION):
QtQuickVersion.commands +=
"grep -rl 'QtQuick [0-9]\\.[0-9]' $$PWD/ | xargs sed -i 's/QtQuick [0-9]\\.[0-9]/QtQuick $${QT_QUICK_VERSION}/g';"
}
QtQuickVersion.target = FORCE
PRE_TARGETDEPS += FORCE
QMAKE_EXTRA_TARGETS += QtQuickVersionpro文件
QT += core
equals (QT_MAJOR_VERSION, 4): QT += declarative
equals (QT_MAJOR_VERSION, 5): QT += qml quick quickwidgets
SOURCES += main.cpp
equals(QT_MAJOR_VERSION, 4) {
equals(QT_MINOR_VERSION, 7): QT_QUICK_VERSION = 1.0
equals(QT_MINOR_VERSION, 8): QT_QUICK_VERSION = 1.1
}
equals(QT_MAJOR_VERSION, 5): QT_QUICK_VERSION = 2.$${QT_MINOR_VERSION}
macx {
!isEmpty(QT_QUICK_VERSION):
QtQuickVersion.commands +=
"grep -rl 'QtQuick [0-9]\\.[0-9]' $$PWD/ | xargs sed -i '' 's/QtQuick [0-9]\\.[0-9]/QtQuick $${QT_QUICK_VERSION}/g';"
}
unix:!macx {
!isEmpty(QT_QUICK_VERSION):
QtQuickVersion.commands +=
"grep -rl 'QtQuick [0-9]\\.[0-9]' $$PWD/ | xargs sed -i 's/QtQuick [0-9]\\.[0-9]/QtQuick $${QT_QUICK_VERSION}/g';"
}
QtQuickVersion.target = FORCE
PRE_TARGETDEPS += FORCE
QMAKE_EXTRA_TARGETS += QtQuickVersionmain.cpp
#include <QtGlobal>
#if (QT_VERSION < QT_VERSION_CHECK(5, 0, 0))
#include <QApplication>
#include <QDeclarativeView>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QDeclarativeView viewer;
viewer.setSource(QUrl::fromLocalFile(QLatin1String("main.qml")));
viewer.show();
return app.exec();
}
#else
#include <QApplication>
#include <QQuickView>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QQuickView viewer;
viewer.setSource(QUrl::fromLocalFile(QLatin1String("main.qml")));
viewer.show();
return app.exec();
}
#endifQt4版本编译替换后的main.qml
import QtQuick 1.1
Rectangle {
width: 360
height: 360
Text {
text: qsTr("Hello World")
anchors.centerIn: parent
}
MouseArea {
anchors.fill: parent
onClicked: {
Qt.quit();
}
}
}Qt5版本编译替换后的main.qml
import QtQuick 2.7
Rectangle {
width: 360
height: 360
Text {
text: qsTr("Hello World")
anchors.centerIn: parent
}
MouseArea {
anchors.fill: parent
onClicked: {
Qt.quit();
}
}
}源码地址
https://github.com/aeagean/QtQuickDemo.git本文参与 腾讯云自媒体分享计划，分享自微信公众号。
原始发表：2019-02-17，如有侵权请联系 cloudcommunity@tencent.com 删除
评论
登录后参与评论
推荐阅读
目录