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101 lines
4.2 KiB
Markdown
101 lines
4.2 KiB
Markdown
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# ZXing iPhone/iPad README #
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ZXing for iOS is a sub-project of zxing project partially maintained
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by independent developers. As of 26th of March 2011, it contains 3 iOS
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projects:
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* Barcodes: Zxing iOS app. Available on the app store.
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* ZXingWidget: a Library that can be included in any iOS app.
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* ScanTest: a simple demo app for ZXingWidget.
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## How to include ZXingWidget in a easy and clean way (in Xcode4) ##
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1. Locate the `ZXingWidget.xcodeproj` file under
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`zxing/iphone/ZXingWidget/`. Drag `ZXingWidget.xcodeproj` and
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drop it onto the root of your Xcode project sidebar. A dialog
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will appear — make sure _Copy items_ is unchecked and _Reference
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Type_ is _Relative to Project_ before clicking
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_Add_. Alternatively you can right-click on you project navigator
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and select 'Add files to _your project_'.
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2. Now you need to link the ZXingWidget static library to your project. To do that
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a. select you project file in the project navigator
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b. In the second column, select your target (not the project itself)
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c. Go to the _Build Phases_ tab, expand the _Link Binary with Libraries_ section
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d. Click the _Add_ button. A dialog will appear and you should see
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`libZXingWidget.a` at or near the top of the list
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3. Now you need to add ZXingWidget as a dependency of your project, so
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Xcode compiles it whenever you compile your project.
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a. Like in substep **c** of previous step, you need to do that in the _Build Phases_ tab of your target
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b. Expand the _Target Dependencies_ section
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c. Click the _Add_ button and a dialog will appear. Select `ZXingWidget` target.
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4. Add the `ZXingWidget` to the _Headers Search Path_.
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a. Select your project in the
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project navigator and then select your target.
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b. Go to the _Build Settings_ tab, look for _Header Search Paths_ and double-click
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it.
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c: Add the relative path from your project's directory to the
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`zxing/iphone/ZXingWidget/Classes` directory and select the _Recursive Path_ checkbox.
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5. Add the C++ core to the _Headers Search Path_. Repeat step **5**, but add the path to the C++ core: `zxing/cpp/core/src`. Do _not_ select the _Recursive Path_ checkbox.
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6. Import the following iOS frameworks:
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* AVFoundation
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* AudioToolbox
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* CoreVideo
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* CoreMedia
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* libiconv
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* AddressBook
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* AddressBookUI
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This must be done by adding them in the _Link Libraries with
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Binary_ just like step **2.c**. If you are supporting iOS 4,
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for AVFoundation, you must select _Optional_ in the pull
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down to the right in order to weak link the
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framework. (Some symbols used in ZXing didn't exist before
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iOS 5.)
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7. `#import <ZXingWidgetController.h>` in a source file
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8. `#import <QRCodeReader.h>` or `#import <MultiFormatReader.h>` for example because you will need to
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inject a barcode reader into `ZXingWidgetController`.
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9. Make sure the file in which you are importing the code headers has a `.mm` extension to enable importing
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C++.
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10. Rename your `main.m` to `main.mm` to link against the C++ standard library.
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11. Make sure the C++ library in _Build Settings_ is _Compiler
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Default_. Some versions of Xcode set this to the LLVM standard
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library. Alternately, you can try setting the C++ library to the
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LLVM version int the `XingWidget` project but this is not
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well-tested.
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## Known issues for above steps to include: ##
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* If you have building error like " ... : No such file or directory",
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then it is a classical error, it means that the include path is
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not well specified. The best way to fix this is to look at the
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build command that failed. To do that, click on the lower right
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corner of your Xcode project, you should see the build command
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that failed. Click on it and expand it by clicking on the _more_
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symbols that just appeared. This will show the exact command line
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instruction that failed. You can then make sure that the header
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search path you specified is there, and you can also copy/paste
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this line into your terminal and try to see if you can
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reproduce/fix the error by adding the right path to the
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compiler. Once is is fixed, you should have an idea of what's the
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problem and accordingly modify your Header Search Path.
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