mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
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61 lines
1.9 KiB
61 lines
1.9 KiB
OpenCV iOS Hello {#tutorial_hello} |
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Goal |
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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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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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