PlayFair was created by an anonymous author, and was heavily based on QTFairUse which was built by DeCSS author “DVD” Jon Lech Johansen, and had been released in January 2004. DVD Jon went on to incorporate QTFairUse’s techniques into VideoLAN’s VLC, and by May had integrated PlayFair back into the VLC codebase. Install the MSI-file and ask your IT administrator for additional right if needed. Download the ClickShare. Thank you for downloading the ClickShare App. Wait for download to finish. Run the downloaded file and perform installation. Many organizations, prominent individuals, and computer scientists are opposed to DRM. Two notable DRM critics are John Walker, as expressed for instance, in his article 'The Digital Imprimatur: How Big brother and big media can put the Internet genie back in the bottle', and Richard Stallman in his article The Right to Read and in other public statements: 'DRM is an example of a.

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Qt's iOS port allows you to run Qt applications on iOS devices, such as iPhones, iPads, and iPod Touches.

Supported Configurations

The following configurations are supported.

Getting Started

Development and deployment is done using Xcode. The supported workflow is to maintain a .pro file based project, which generates an Xcode project. Building and deploying can be done using either Xcode or Qt Creator. We will look at that in more detail in the next section.

The minimum deployment target for Qt applications is specified in Supported Platforms.

Setting Up the Development Environment

You can download the Qt 5 installers from the Downloads page. For more information, see Getting Started with Qt.

Before installing Qt, you first need to install Xcode. You will find it in the Mac App Store here.

Note: As recommended by Apple, you should always use the latest Xcode version when building your applications for the App Store. In practice this means you also need the latest version of macOS to develop apps with Qt, due to Xcode's system requirements.

For running Qt applications on your Mac or in the simulator that comes with Xcode, this is all you need. However, for running applications on a mobile device and/or publishing your applications in the App Store, you must join the Apple Developer Program, and set up developer certificates and provisioning profiles. The easiest solution is to use a profile that takes any App ID (a *).

Before building any Qt applications, you should test that Xcode is set up correctly, for example, by running one of the standard Xcode application templates on your device.

Building Applications From the Command Line

As mentioned previously, the development workflow consists of maintaining a normal .pro file project and exporting it to Xcode.

Here is how to build a project with Xcode:

• run qmake (if you have not done so previously)
• open the resulting .xcodeproj file in Xcode
• build the application in Xcode

Note that you must re-import the project if its setup changes, for example, when adding or removing source files.

Building Applications with Qt Creator

You can find information on how to set up and run Apple mobile device applications in Qt Creator's manual:

• Connecting Apple Mobile Devices.

As mentioned previously, you must have Xcode installed.

Using Objective-C Code in Qt Applications

Clang, the compiler used for applications on Apple Platforms, allows mixing C++ and Objective-C code. To enable this mode, suffix your source files with .mm, and add them to OBJECTIVE_SOURCES instead of SOURCES in the .pro file. This makes it possible to use frameworks from Apple's Developer Library in Qt applications. Most useful is perhaps the possibility for adding In-App Purchasing with the StoreKit framework.

Examples for iOS

In Qt Creator, tested examples on iOS can be looked up. Use the ios keyword to search for examples in the Qt Creator Welcome mode. Note that some examples may have limited functionality.

For a list of examples known to work on iOS devices, visit Qt for iOS Examples.

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Related Topics

The following topics provide more details about Qt for iOS:

© 2021 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.

Exclusive Norwegian programmer Jon Lech Johansen, who broke the DVD encryption scheme, has opened iTunes locked music a tad further, by allowing people to play songs they've purchased on iTunes Music Store on their GNU/Linux computers.

'We're about to find out what Apple really thinks about Fair Use,' Johansen told The Register via email.

Johansen cracked iTunes DRM scheme in November by releasing code for a small Windows program that dumps the stream to disk in raw AAC format. This raw format required some trivial additions to convert it to an MP4 file that could be played on any capable computer.

But in the best Apple ease-of-use tradition, Johansen has now made this completely seamless, integrating it with the VideoLAN streaming free software project.

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How it works

Johansen deduced that the system key which locks the locked music to a single Windows computer is derived from four factors: the serial number of the C: drive, the system BIOS version, the CPU name and the Windows Product ID.

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'When you run the VideoLAN Client under Windows it will write the user key to a file. The user key is system independent and can thus be used by the GNU/Linux version of VLC,' he explains.

While Apple's iTunes Music Store is restricted to Windows and Apple computers, and Apple only supports its own iPod player as a playback device, VideoLAN is GPL software that runs on a wide variety of computers including Linux, the BSDs, Solaris and even QNX. Although users are at present permitted to burn a CD with music they've purchased, only three Apple or Windows computers are 'authorized' at any time. These terms may be tightened at any time, Johansen himself noted recently.

'The RIAA can at any time change the DRM rules,' he wrote in November, 'and considering their history, it's likely that they will when the majority of consumers have embraced DRM and non-DRM products have been phased out. Some DVDs today include commercials which can't be skipped using 'sanctioned' players. If the RIAA forces Apple to include commercials, what excuses will the Mac zealots come up with? 'It's a good compromise'?'

Reaction

'The restrictions are very frustrating for consumers, and frankly, are unnecessary,' Electronic Frontier Foundation attorney Fred Von Lohmann told The Register.

'Every song on iTunes Music Store has been available on the Peer to Peer networks within four hours. All the DRM does is frustrate legitimate consumers; it doesn't stop file sharing,' he says. 'The real innovation of the last several years was Kazaa and the other file sharing applications. These are leaps and bounds more relevant than iTunes Music Store.'

Although the number of downloaders has diminished in the face of lawsuits by the RIAA, tens of millions of Internet users continue to share music on the P2P networks, dwarfing the number of locked-music downloads from DRM stores such as Apple's iTMS.

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Apple is widely expected to announce more locked music playback hardware at the MacWorld show in San Francisco this week. But with support growing for flat fee licensing models even amongst record industry executives, today's DRM Goldrush (and the ensuing iTunes vs Windows Media war) could be a very short lived skirmish.

Johansen broke the CSS encryption scheme on DVDs - a case the Norwegian government finally let go - so he could watch a movie that he'd legitimately purchased on his Linux PC. Now millions of Linux users can do the same with iTunes locked music. ®

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