ios - 如何在 IOS 上使用 Boost 和 Cocoapods？

Question

有没有人成功地将 Cocoapods 与 Boost pod 一起使用？

我不明白它似乎没有完全安装。在 pod 安装到一个空白项目后，我得到以下信息。有没有我遗漏的步骤？

这是我安装的结果

pod 安装 --verbose

Analyzing dependencies

Updating spec repositories
  $ /Applications/XCode.app/Contents/Developer/usr/bin/git rev-parse  >/dev/null 2>&1
  $ /Applications/XCode.app/Contents/Developer/usr/bin/git rev-parse  >/dev/null 2>&1
Updating spec repo `master`
  $ /Applications/XCode.app/Contents/Developer/usr/bin/git pull --ff-only
  Already up-to-date.

CocoaPods 0.36.3 is available.
To update use: `gem install cocoapods`

For more information see http://blog.cocoapods.org
and the CHANGELOG for this version http://git.io/BaH8pQ.


Inspecting targets to integrate
  Using `ARCHS` setting to build architectures of target `Pods`: (``)
  Using `ARCHS` setting to build architectures of target `Pods-PodBoost`: (``)

Resolving dependencies of `Podfile`
Starting resolution (2015-04-01 15:48:56 +0300)
Creating possibility state for boost (~> 1.57) (1 remaining)
  Attempting to activate boost (1.57.0)
  Activated boost at boost (1.57.0)
  Requiring nested dependencies (boost/string_algorithms-includes (= 1.57.0), boost/shared_ptr-includes (= 1.57.0), boost/pointer_cast-includes (= 1.57.0), boost/numeric-includes (= 1.57.0), boost/preprocessor-includes (= 1.57.0), boost/math-includes (= 1.57.0), boost/graph-includes (= 1.57.0))
  Creating possibility state for boost/string_algorithms-includes (= 1.57.0) (1 remaining)
    Attempting to activate boost/string_algorithms-includes (1.57.0)
    Activated boost/string_algorithms-includes at boost/string_algorithms-includes (1.57.0)
    Requiring nested dependencies ()
    Creating possibility state for boost/shared_ptr-includes (= 1.57.0) (1 remaining)
      Attempting to activate boost/shared_ptr-includes (1.57.0)
      Activated boost/shared_ptr-includes at boost/shared_ptr-includes (1.57.0)
      Requiring nested dependencies ()
      Creating possibility state for boost/pointer_cast-includes (= 1.57.0) (1 remaining)
        Attempting to activate boost/pointer_cast-includes (1.57.0)
        Activated boost/pointer_cast-includes at boost/pointer_cast-includes (1.57.0)
        Requiring nested dependencies ()
        Creating possibility state for boost/numeric-includes (= 1.57.0) (1 remaining)
          Attempting to activate boost/numeric-includes (1.57.0)
          Activated boost/numeric-includes at boost/numeric-includes (1.57.0)
          Requiring nested dependencies ()
          Creating possibility state for boost/preprocessor-includes (= 1.57.0) (1 remaining)
            Attempting to activate boost/preprocessor-includes (1.57.0)
            Activated boost/preprocessor-includes at boost/preprocessor-includes (1.57.0)
            Requiring nested dependencies ()
            Creating possibility state for boost/math-includes (= 1.57.0) (1 remaining)
              Attempting to activate boost/math-includes (1.57.0)
              Activated boost/math-includes at boost/math-includes (1.57.0)
              Requiring nested dependencies ()
              Creating possibility state for boost/graph-includes (= 1.57.0) (1 remaining)
                Attempting to activate boost/graph-includes (1.57.0)
                Activated boost/graph-includes at boost/graph-includes (1.57.0)
                Requiring nested dependencies ()
Finished resolution (8 steps) (Took 0.007472 seconds) (2015-04-01 15:48:56 +0300)
Unactivated: 
Activated: boost, boost/string_algorithms-includes, boost/shared_ptr-includes, boost/pointer_cast-includes, boost/numeric-includes, boost/preprocessor-includes, boost/math-includes, boost/graph-includes

Comparing resolved specification to the sandbox manifest
  A boost

Downloading dependencies

-> Installing boost (1.57.0)
 > Http download
   $ /usr/bin/curl -f -L -o /Users/ryanheitner/Projects/PodBoost/Pods/boost/file.tgz "http://sourceforge.net/projects/boost/files/boost/1.57.0/boost_1_57_0.tar.gz" --create-dirs
     % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                    Dload  Upload   Total   Spent    Left  Speed
  0   353    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0   423    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0   337    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
100 70.0M  100 70.0M    0     0  2744k      0  0:00:26  0:00:26 --:--:-- 3007k
   $ /usr/bin/tar xfz /Users/ryanheitner/Projects/PodBoost/Pods/boost/file.tgz -C /Users/ryanheitner/Projects/PodBoost/Pods/boost
  - Running pre install hooks

Generating Pods project
  - Creating Pods project
  - Adding source files to Pods project
  - Adding frameworks to Pods project
  - Adding libraries to Pods project
  - Adding resources to Pods project
  - Linking headers
  - Installing targets
    - Installing target `Pods-PodBoost` iOS 8.2
  - Running post install hooks
  - Writing Xcode project file to `Pods/Pods.xcodeproj`
  - Writing Lockfile in `Podfile.lock`
  - Writing Manifest in `Pods/Manifest.lock`

Answer 1

为什么没有列出 Pod？

这是 boost 的产物，不是 Xcode 项目，只是一组文件。此外，您会发现 boost 内部目录位于 ${PODS_ROOT}/boost 内，在 Build Settings 的Header Search Path 中引用。这就是您使用 Pod 的好处。

Pod 和 Boost 层次结构

需要在 boost 中嵌套 ../Pods/boost/boost 以允许库中的文件引用自身，如下所示:

#include "boost/date_time/posix_time/posix_time_config.hpp"

如果让操作完成:(压缩后 boost 库超过 100 MB)

Downloading dependencies
Installing boost (1.57.0)
Generating Pods project
Integrating client project

...虽然您在项目中看不到它，但您会发现它在源代码树中:

你可以引用它:

#import "boost/date_time.hpp"

并开始处理其他紧迫的问题，例如定位 #include <cstdlib> ，这完全是另一个话题。

Objective-C++ 编译

为了编译 boost ，它是一个 C++ 库，您需要从 C++ 源文件(不是 C源，这是 .m 中的默认值)，或采用 compiling a C++ class in Xcode: error during compilation: stl vector 中列出的替代解决方案。

从 .mm 文件中，包含以下两个测试行:

#include <cstdlib> // Proof of concept
#import "boost/date_time.hpp"

为了这个例子，我将 main.m 重命名为 main.mm 。由于 Pod 没有导入任何 .ipp 文件，您可以在 Build Settings 的 Preprocessor Macros 中添加 NO_BOOST_DATE_TIME_INLINE=1。这样做，您将收到大约一打警告，如下所示，并且编译成功，无需手动导入。

Implicit conversion loses integer precision: 'long' to 'hour_type' (aka 'int')

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编辑:删除了一个偏离主题的手动导入，不需要

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