xcode – OpenCV Framework：未找到架构armv7的符号

我从OpenCV获得了 precompiled opencv2.framework,我已将它添加到我的项目中.但是,尝试编译项目会产生以下错误：

Undefined symbols for architecture armv7:
  "std::__1::__vector_base_common<true>::__throw_length_error() const",referenced from:
      std::__1::vector<unsigned long,std::__1::allocator<unsigned long> >::__append(unsigned long) in opencv2(matrix.o)
      std::__1::vector<cv::Vec<int,128>,std::__1::allocator<cv::Vec<int,128> > >::__append(unsigned long) in opencv2(matrix.o)
      std::__1::vector<cv::Vec<int,64>,64> > >::__append(unsigned long) in opencv2(matrix.o)
      std::__1::vector<cv::Vec<int,32>,32> > >::__append(unsigned long) in opencv2(matrix.o)
      std::__1::vector<cv::Vec<int,16>,16> > >::__append(unsigned long) in opencv2(matrix.o)
      std::__1::vector<cv::Vec<int,12>,12> > >::__append(unsigned long) in opencv2(matrix.o)
      std::__1::vector<cv::Vec<int,9>,9> > >::__append(unsigned long) in opencv2(matrix.o)
      ...
  "std::__1::basic_string<char,std::__1::char_traits<char>,std::__1::allocator<char> >::basic_string(std::__1::basic_string<char,std::__1::allocator<char> > const&)",referenced from:
      cv::Exception::Exception(int,std::__1::basic_string<char,std::__1::allocator<char> > const&,int) in opencv2(system.o)
      cv::error(cv::Exception const&) in opencv2(system.o)
      _cvRegisterModule in opencv2(system.o)
  "std::__1::basic_string<char,std::__1::allocator<char> >::operator=(std::__1::basic_string<char,referenced from:
      cv::Exception::formatMessage() in opencv2(system.o)
  "_OBJC_CLASS_$_ALAssetsLibrary",referenced from:
      objc-class-ref in opencv2(cap_ios_video_camera.o)
  "std::__1::basic_string<char,std::__1::allocator<char> >::__init(char const*,unsigned long)",referenced from:
      cv::sum(cv::_InputArray const&) in opencv2(stat.o)
      cv::countNonZero(cv::_InputArray const&) in opencv2(stat.o)
      cv::mean(cv::_InputArray const&,cv::_InputArray const&) in opencv2(stat.o)
      cv::meanStdDev(cv::_InputArray const&,cv::_OutputArray const&,cv::_InputArray const&) in opencv2(stat.o)
      cv::minMaxIdx(cv::_InputArray const&,double*,int*,cv::_InputArray const&) in opencv2(stat.o)
      cv::minMaxLoc(cv::_InputArray const&,cv::Point_<int>*,cv::_InputArray const&) in opencv2(stat.o)
      cv::norm(cv::_InputArray const&,int,cv::_InputArray const&) in opencv2(stat.o)
      ...
  "std::__1::basic_string<char,std::__1::allocator<char> >::~basic_string()",cv::_InputArray const&) in opencv2(stat.o)
      ...
ld: symbol(s) not found for architecture armv7
clang: error: linker command Failed with exit code 1 (use -v to see invocation)

我在构建设置中仅将Build Active Architectures设置为No,但它仍然会发生.我需要做些什么才能让OpenCV正常工作？我正在使用XCode 5,目标是iOS7.

我已经added -lstdc++ to linker flags and switch the C++ compiler to libstdc++,as-per this answer了.

我也尝试过从源代码编译OpenCV但产生相同的错误.

无论我是否将iOS6或7作为部署目标,它都是一样的.

解决方法

你应该检查两件事：

>您正在尝试使用OpenCV的C部分,但Xcode / clang非常直观.如果您要链接的文件是.m,它会将其视为Objective-C.相反,我们希望通过将扩展名重命名为.mm或者在右侧栏中显示文件属性并为类型选择Objective-C Source来将其视为Objective-C文件.> ALAssetsLibrary在AssetsLibrary.framework中定义,请将其添加到项目的Link Binary With Libraries步骤中.

原文地址：https://www.jb51.cc/iOS/332561.html