72 lines
2.1 KiB
Markdown
72 lines
2.1 KiB
Markdown
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OpenCV iOS Hello {#tutorial_hello}
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================
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@tableofcontents
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@prev_tutorial{tutorial_ios_install}
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@next_tutorial{tutorial_image_manipulation}
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| -: | :- |
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| Original author | Charu Hans |
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| Compatibility | OpenCV >= 3.0 |
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Goal
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----
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In this tutorial we will learn how to:
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- Link OpenCV framework with Xcode
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- How to write simple Hello World application using OpenCV and Xcode.
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Linking OpenCV iOS
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------------------
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Follow this step by step guide to link OpenCV to iOS.
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-# Create a new XCode project.
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-# Now we need to link *opencv2.framework* with Xcode. Select the project Navigator in the left
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hand panel and click on project name.
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-# Under the TARGETS click on Build Phases. Expand Link Binary With Libraries option.
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-# Click on Add others and go to directory where *opencv2.framework* is located and click open
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-# Now you can start writing your application.
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Hello OpenCV iOS Application
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----------------------------
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Now we will learn how to write a simple Hello World Application in Xcode using OpenCV.
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- Link your project with OpenCV as shown in previous section.
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- Open the file named *NameOfProject-Prefix.pch* ( replace NameOfProject with name of your
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project) and add the following lines of code.
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@code{.m}
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#ifdef __cplusplus
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#import <opencv2/opencv.hpp>
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#endif
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@endcode
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- Add the following lines of code to viewDidLoad method in ViewController.m.
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@code{.m}
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UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Hello!" message:@"Welcome to OpenCV" delegate:self cancelButtonTitle:@"Continue" otherButtonTitles:nil];
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[alert show];
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@endcode
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- You are good to run the project.
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Output
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------
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Changes for XCode5+ and iOS8+
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-----------------------------
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With the newer XCode and iOS versions you need to watch out for some specific details
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- The *.m file in your project should be renamed to *.mm.
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- You have to manually include AssetsLibrary.framework into your project, which is not done anymore by default.
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