QML cross-platform plugin

shav

Hi everyone!

I'm developing a QML plugin. This plugin must work on desktop, iOS and Android. I have a strange problem with QtCreator when I change target for build from iOS to Desktop and the Desktop to iOS my test application can't find plugin for iOS but all build fine. I don't change any settings for Qt or application which using plugin. Only change target for build and now I can't build iOS application because it's can't find plugin. What I can do to fix this problem. Application pro file looks like:

TEMPLATE = app

QT += qml quick widgets

SOURCES += main.cpp

RESOURCES += qml.qrc

macx {
    ICON = icon.icns
    QMAKE_INFO_PLIST = Info.plist
} else:ios {
    QMAKE_INFO_PLIST = Info_ios.plist

    assets_catalogs.files = $$files($$PWD/*.xcassets)
    QMAKE_BUNDLE_DATA += assets_catalogs

    app_launch_images.files = $$PWD/LaunchScreen.xib $$files($$PWD/*.png)
    QMAKE_BUNDLE_DATA += app_launch_images
}

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Default rules for deployment.
include(deployment.pri)

Pro file for plugin looks like:

TEMPLATE = lib
TARGET = Nestlean
VERSION = 1.0.0

QT += qml quick network widgets
CONFIG += qt plugin c++11 crypto objective_c

ios {
    CONFIG += static
}


QMAKE_CXXFLAGS_WARN_ON += -Wno-unknown-pragmas


DESTDIR = com/consultica/nestlean
OBJECTS_DIR = tmp/objects   #— на усмотрение, обычно в папку tmp засовываю автоматически сгенерированные Qt файлы
MOC_DIR = tmp/mocs          #— аналогично


TARGET = $$qtLibraryTarget($$TARGET)
uri = com.consultica.nestlean
QMAKE_MOC_OPTIONS += -Muri=com.consultica.nestlean


# Input
SOURCES += \
    nestlean_plugin.cpp \
    nestlean.cpp \
    Helpers/Settings/nestleansettings.cpp \
    Requests/nestleanrequestmanager.cpp \
    Requests/nestleanrequest.cpp \
    Objects/User/nestleanuser.cpp \
    Objects/Application/nestleanapplication.cpp \
    Objects/Build/nestleanbuild.cpp \
    Objects/nestleandevicetestinfo.cpp \
    Objects/User/nestleanpeopleitem.cpp \
    Objects/Report/nestleanreport.cpp \
    Objects/Screen/nestleanscreen.cpp \
    Objects/Crash/nestleancrash.cpp \
    Objects/Crash/nestleancrashevent.cpp \
    Objects/Crash/nestleancrashinfolist.cpp \
    Objects/Crash/nestleancrashanatomy.cpp \
    Objects/Crash/nestleancrashhistory.cpp \
    Objects/Screen/nestleanscreenlist.cpp \
    Objects/nestleanuploadbuildview.cpp

HEADERS += \
    nestlean_plugin.h \
    nestlean.h \
    Helpers/Settings/nestleansettings.h \
    Requests/nestleanrequestmanager.h \
    Requests/nestleanrequest.h \
    Objects/User/nestleanuser.h \
    Objects/Application/nestleanapplication.h \
    Objects/Build/nestleanbuild.h \
    Objects/nestleandevicetestinfo.h \
    Objects/User/nestleanpeopleitem.h \
    Objects/Report/nestleanreport.h \
    Objects/Screen/nestleanscreen.h \
    Objects/Crash/nestleancrash.h \
    Objects/Crash/nestleancrashevent.h \
    Objects/Crash/nestleancrashinfolist.h \
    Objects/Crash/nestleancrashanatomy.h \
    Objects/Crash/nestleancrashhistory.h \
    Objects/Screen/nestleanscreenlist.h \
    Helpers/shavhelpermanager.h \
    Objects/nestleanuploadbuildview.h

ios|android {
    DISTFILES = \
        nestlean.json

    !equals(_PRO_FILE_PWD_, $$OUT_PWD) {
        copy_qmldir.target = $$OUT_PWD/$$DESTDIR/qmldir_mobile
        copy_qmldir.depends = $$_PRO_FILE_PWD_/qmldir_mobile
        copy_qmldir.commands = $(COPY_FILE) \"$$replace(copy_qmldir.depends, /, $$QMAKE_DIR_SEP)\" \"$$replace(copy_qmldir.target, /, $$QMAKE_DIR_SEP)\"

        sourceQmlTypePath = $$_PRO_FILE_PWD_/nestlean.qmltypes
        targetQmlTypePath = $$OUT_PWD/$$DESTDIR/nestlean.qmltypes
        copy_qmldir.commands += && $(COPY_FILE) \"$$replace(sourceQmlTypePath, /, $$QMAKE_DIR_SEP)\" \"$$replace(targetQmlTypePath, /, $$QMAKE_DIR_SEP)\"

        QMAKE_EXTRA_TARGETS += copy_qmldir
        PRE_TARGETDEPS += $$copy_qmldir.target
    }

    qmldir.files = qmldir_mobile
} else {
    DISTFILES = qmldir \
        nestlean.json

    !equals(_PRO_FILE_PWD_, $$OUT_PWD) {
        copy_qmldir.target = $$OUT_PWD/$$DESTDIR/qmldir
        copy_qmldir.depends = $$_PRO_FILE_PWD_/qmldir
        copy_qmldir.commands = $(COPY_FILE) \"$$replace(copy_qmldir.depends, /, $$QMAKE_DIR_SEP)\" \"$$replace(copy_qmldir.target, /, $$QMAKE_DIR_SEP)\"

        sourceQmlTypePath = $$_PRO_FILE_PWD_/nestlean.qmltypes
        targetQmlTypePath = $$OUT_PWD/$$DESTDIR/nestlean.qmltypes
        copy_qmldir.commands += && $(COPY_FILE) \"$$replace(sourceQmlTypePath, /, $$QMAKE_DIR_SEP)\" \"$$replace(targetQmlTypePath, /, $$QMAKE_DIR_SEP)\"

        QMAKE_EXTRA_TARGETS += copy_qmldir
        PRE_TARGETDEPS += $$copy_qmldir.target
    }

    qmldir.files = qmldir
}


unix {
    installPath = $$[QT_INSTALL_QML]/$$replace(uri, \\., /)
    qmldir.path = $$installPath
    target.path = $$installPath
    INSTALLS += target qmldir
}

macx {
    message("OSX")
    QMAKE_LFLAGS += -F$$PWD
    LIBS += -lz -framework Foundation -framework CoreFoundation
    DEFINES += Q_WS_MAC QT_MAC_USE_COCOA
    RESOURCES += \
        resources.qrc
} else:ios {
    message("iOS")
    LIBS += -framework Foundation -framework CoreFoundation -framework UIKit
    DEFINES += Q_WS_MAC QT_MAC_USE_COCOA

    OBJECTIVE_HEADERS += \
        Helpers/shavhelpermanager.h

    OBJECTIVE_SOURCES += \
        Helpers/shavhelpermanager.mm

    RESOURCES += \
        mobile/resources_mobile.qrc
} else:android {
    message("ANDROID")
    RESOURCES += \
        mobile/resources_mobile.qrc
} else {
    message("OTHER")
    RESOURCES += \
        resources.qrc
}

DISTFILES += \
    qmldir_mobile

QML file where I use plugin in application looks like

import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Window 2.2
import QtQuick.Dialogs 1.2
import com.consultica.nestlean 1.0



ApplicationWindow {
    id: rootApp
    title: qsTr("Nestlean Client")
    width: nestView.minimalWidth
    minimumWidth: nestView.minimalWidth
    height: nestView.minimalHeight
    minimumHeight: nestView.minimalHeight
    visible: true
    menuBar: (Qt.platform.os !== "ios" && Qt.platform.os !== "android") ? menu : null

    MenuBar {
        id: menu
        Menu {
            title: qsTr("&File")

            MenuItem {
                text: qsTr("E&xit")
                onTriggered: Qt.quit();
            }
        }
    }

    NestleanView {
        id: nestView
        anchors {fill: parent}
    }
}

Thanks for the any help!

hamer

You have to register the static plugin in the C++ code (for instance in the main method). I cannot remember the exact command but someone posted it here in the forum recently.

shav

Thanks for the replay! I'll check this!

timday

Be aware that for iOS at least there's a little more verbosity involved with the static plugins than the docs would suggest; see https://bugreports.qt.io/browse/QTBUG-47827

There's a minimal plugin example (demonstrating the issue above, and the workround) at https://bitbucket.org/timday/qt-example-plugin/