Qt for iOS Preview
We are very excited to be able to bring Qt to a new platform. Qt for iOS is planned to be a supported part of Qt 5.2, scheduled for release late 2013. The scope of that release is not completely determined: available resources, platform/app store restrictions and Qt legacy set constraints on the project. This blog outlines the current plan.
Qt 5.1 will contain a preview - which was in fact merged last Friday. It’s also possible to take a look today by checking out the Qt source code. See “Getting Started” for detailed instructions below.
Development and Deployment
Development and especially deployment is done using Xcode. The supported workflow is to maintain a .pro file based project, export it to Xcode (and re-export when the project setup changes), and then build and deploy using Xcode. Source code editing can as usual be done in any editor.
Qt 5 Architecture
Understanding the level of support various Qt modules will get, requires a brief detour into Qt 5 architecture. With Qt 5 there is now a common API that all platforms implement (the Qt platform abstraction - QPA). Most of the Qt for iOS project work will happen here, and this is the code base the team will support. The QPA layer powers both widgets and QML (1 and 2).
The Qt Mac style uses the HITheme API provided by OS X to draw native-looking UI elements. There is no such API on iOS, which means creating a QiOSStyle similar to QMacStyle is not possible. Cross-platform styles such as the new Fusion style will however be available. Future styling efforts will focus on controls for Qt Quick 2.
What works today
- Graphics View
- Qt Quick 1
- Touch events
- Orientation events
- Homework: Setup Xcode for development (acquire certificates, configure devices). Test-deploy one of the standard Xcode app templates. Make sure you have Git installed.
- Clone qtbase
git clone git://gitorious.org/qt/qtbase.git qtbase-ios
git checkout dev
git checkout iosfor the development branch]
- Build QtBase for either device or simulator. Note that unlike Qt 4, Qt 5 does not support multi-architecture builds.
/configure -xplatform unsupported/macx-ios-clang -developer-build -nomake examples -nomake tests -release [-sdk iphonesimulator]
- Get the Simple Demo:
git clone git://github.com/msorvig/qt-ios-demo.git
Update: Building Qt Quick 1
You need the full Qt source code, see Building Qt 5 from Git. Then build the QtScript and QtQuick1 modules:
cd qtscript; ../qtbase/bin/qmake; make; cd ..
cd qtquick1; ../qtbase/bin/qmake; make; cd ..
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