init - 初始化项目

doc/tutorials/ios/ios_install/ios_install.markdown

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+Installation in iOS {#tutorial_ios_install}
+===================
+
+@tableofcontents
+
+@next_tutorial{tutorial_hello}
+
+|    |    |
+| -: | :- |
+| Original author | Artem Myagkov, Eduard Feicho, Steve Nicholson |
+| Compatibility | OpenCV >= 3.0 |
+
+@warning
+This tutorial can contain obsolete information.
+
+Required Packages
+-----------------
+
+-   CMake 2.8.8 or higher
+-   Xcode 4.2 or higher
+
+### Getting the Cutting-edge OpenCV from Git Repository
+
+Launch Git client and clone OpenCV repository from [GitHub](http://github.com/opencv/opencv).
+
+In MacOS it can be done using the following command in Terminal:
+
+@code{.bash}
+cd ~/<my_working _directory>
+git clone https://github.com/opencv/opencv.git
+@endcode
+
+If you want to install OpenCV’s extra modules, clone the opencv_contrib repository as well:
+
+@code{.bash}
+cd ~/<my_working _directory>
+git clone https://github.com/opencv/opencv_contrib.git
+@endcode
+
+
+Building OpenCV from Source, using CMake and Command Line
+---------------------------------------------------------
+
+1.  Make sure the xcode command line tools are installed:
+    @code{.bash}
+    xcode-select --install
+    @endcode
+
+2.  Build OpenCV framework:
+    @code{.bash}
+    cd ~/<my_working_directory>
+    python opencv/platforms/ios/build_framework.py ios
+    @endcode
+
+3.  To install OpenCV’s extra modules, append `--contrib opencv_contrib` to the python command above. **Note:** the extra modules are not included in the iOS Pack download at [OpenCV Releases](https://opencv.org/releases/). If you want to use the extra modules (e.g. aruco), you must build OpenCV yourself and include this option:
+    @code{.bash}
+    cd ~/<my_working_directory>
+    python opencv/platforms/ios/build_framework.py ios --contrib opencv_contrib
+    @endcode
+
+4.  To exclude a specific module, append `--without <module_name>`. For example, to exclude the "optflow" module from opencv_contrib:
+    @code{.bash}
+    cd ~/<my_working_directory>
+    python opencv/platforms/ios/build_framework.py ios --contrib opencv_contrib --without optflow
+    @endcode
+
+5.  The build process can take a significant amount of time. Currently (OpenCV 3.4 and 4.1), five separate architectures are built: armv7, armv7s, and arm64 for iOS plus i386 and x86_64 for the iPhone simulator. If you want to specify the architectures to include in the framework, use the `--iphoneos_archs` and/or `--iphonesimulator_archs` options. For example, to only build arm64 for iOS and x86_64 for the simulator:
+    @code{.bash}
+    cd ~/<my_working_directory>
+    python opencv/platforms/ios/build_framework.py ios --contrib opencv_contrib --iphoneos_archs arm64 --iphonesimulator_archs x86_64
+    @endcode
+
+If everything’s fine, the build process will create
+`~/<my_working_directory>/ios/opencv2.framework`. You can add this framework to your Xcode projects.
+
+Further Reading
+---------------
+
+You can find several OpenCV+iOS tutorials here @ref tutorial_table_of_content_ios.