Question

我在iOS应用中集成Tesseract SDK时遇到了一些错误。我遵循的程序 -

1）在xcode中拖动“libtesseract_full.a” 2）在xcode中拖动“tessdata”文件夹 3）在xcode中拖动“baseapi.h”

现在我正在使用Tesseract -

// init the tesseract engine.
tess = new TessBaseAPI();

tess->SimpleInit([dataPath cStringUsingEncoding:NSUTF8StringEncoding],  // Path to tessdata-no ending /.
                 "eng",  // ISO 639-3 string or NULL.
                 false);

我得到以下错误（我认为有一些框架或类似的东西丢失，但没有得到缺少的东西，tesseract演示项目在我的系统上正常工作）

clang: warning: argument unused during compilation: '-stdc++'
ld: warning: CPU_SUBTYPE_ARM_ALL subtype is deprecated: /Users/saurabhsharma/Desktop/Tess/SnapXv2/libtesseract_full.a(libtesseract_full.o)
Undefined symbols for architecture armv7:
  "std::basic_ostream<char, std::char_traits<char> >& std::operator<<<std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)", referenced from:
      SVNetwork::SVNetwork(char const*, int) in libtesseract_full.a(libtesseract_full.o)
  "std::_Rb_tree_decrement(std::_Rb_tree_node_base*)", referenced from:
      std::_Rb_tree_iterator<std::pair<char const* const, int> >::operator--() in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree_iterator<std::pair<int const, VariableContent*> >::operator--() in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree_iterator<std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > >::operator--() in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree_iterator<std::pair<int const, ScrollView*> >::operator--() in libtesseract_full.a(libtesseract_full.o)
  "std::string::operator+=(char const*)", referenced from:
      ScrollView::SendPolygon() in libtesseract_full.a(libtesseract_full.o)
  "std::ios_base::Init::Init()", referenced from:
      __static_initialization_and_destruction_0(int, int) in libtesseract_full.a(libtesseract_full.o)
      __static_initialization_and_destruction_0(int, int) in libtesseract_full.a(libtesseract_full.o)
  "std::string::size() const", referenced from:
      SVNetwork::Flush() in libtesseract_full.a(libtesseract_full.o)
  "std::__throw_length_error(char const*)", referenced from:
      std::vector<int, std::allocator<int> >::_M_insert_aux(__gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> > >, int const&) in libtesseract_full.a(libtesseract_full.o)
  "std::string::erase(unsigned long, unsigned long)", referenced from:
      SVNetwork::Flush() in libtesseract_full.a(libtesseract_full.o)
  "std::_Rb_tree_rebalance_for_erase(std::_Rb_tree_node_base*, std::_Rb_tree_node_base&)", referenced from:
      std::_Rb_tree<int, std::pair<int const, ScrollView*>, std::_Select1st<std::pair<int const, ScrollView*> >, std::less<int>, std::allocator<std::pair<int const, ScrollView*> > >::erase(std::_Rb_tree_iterator<std::pair<int const, ScrollView*> >) in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree<std::pair<ScrollView*, SVEventType>, std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> >, std::_Select1st<std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > >, std::less<std::pair<ScrollView*, SVEventType> >, std::allocator<std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > > >::erase(std::_Rb_tree_iterator<std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > >) in libtesseract_full.a(libtesseract_full.o)
  "std::string::length() const", referenced from:
      SVNetwork::Flush() in libtesseract_full.a(libtesseract_full.o)
  "std::string::operator+=(char)", referenced from:
      ScrollView::SendPolygon() in libtesseract_full.a(libtesseract_full.o)
  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()", referenced from:
      ScrollView::SendPolygon() in libtesseract_full.a(libtesseract_full.o)
      SVNetwork::SVNetwork(char const*, int) in libtesseract_full.a(libtesseract_full.o)
  "std::_Rb_tree_increment(std::_Rb_tree_node_base*)", referenced from:
      std::_Rb_tree_iterator<std::pair<int const, VariableContent*> >::operator++() in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree_iterator<std::pair<char const* const, int> >::operator++() in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree_iterator<std::pair<int const, ScrollView*> >::operator++() in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree_iterator<std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > >::operator++() in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree_iterator<std::pair<int const, ScrollView*> >::operator++(int) in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree_iterator<std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > >::operator++(int) in libtesseract_full.a(libtesseract_full.o)
  "std::_Rb_tree_insert_and_rebalance(bool, std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::_Rb_tree_node_base&)", referenced from:
      std::_Rb_tree<int, std::pair<int const, VariableContent*>, std::_Select1st<std::pair<int const, VariableContent*> >, std::less<int>, std::allocator<std::pair<int const, VariableContent*> > >::_M_insert(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::pair<int const, VariableContent*> const&) in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree<char const*, std::pair<char const* const, int>, std::_Select1st<std::pair<char const* const, int> >, std::less<char const*>, std::allocator<std::pair<char const* const, int> > >::_M_insert(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::pair<char const* const, int> const&) in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree<int, std::pair<int const, ScrollView*>, std::_Select1st<std::pair<int const, ScrollView*> >, std::less<int>, std::allocator<std::pair<int const, ScrollView*> > >::_M_insert(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::pair<int const, ScrollView*> const&) in libtesseract_full.a(libtesseract_full.o)
      std::_Rb_tree<std::pair<ScrollView*, SVEventType>, std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> >, std::_Select1st<std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > >, std::less<std::pair<ScrollView*, SVEventType> >, std::allocator<std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > > >::_M_insert(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::pair<std::pair<ScrollView*, SVEventType> const, std::pair<SVSemaphore*, SVEvent*> > const&) in libtesseract_full.a(libtesseract_full.o)
  "std::ios_base::Init::~Init()", referenced from:
      ___tcf_0 in libtesseract_full.a(libtesseract_full.o)
      ___tcf_0 in libtesseract_full.a(libtesseract_full.o)
  "std::string::c_str() const", referenced from:
      ScrollView::SendPolygon() in libtesseract_full.a(libtesseract_full.o)
      SVNetwork::Flush() in libtesseract_full.a(libtesseract_full.o)
  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string()", referenced from:
      ScrollView::SendPolygon() in libtesseract_full.a(libtesseract_full.o)
      SVNetwork::SVNetwork(char const*, int) in libtesseract_full.a(libtesseract_full.o)
  "std::string::append(char const*)", referenced from:
      SVNetwork::Send(char const*) in libtesseract_full.a(libtesseract_full.o)
  "std::cout", referenced from:
      SVNetwork::SVNetwork(char const*, int) in libtesseract_full.a(libtesseract_full.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

任何帮助都将不胜感激。

Answer 1

刚刚将构建设置中的“C ++标准库”更改为“libstdc ++（GNU C ++标准库）”，错误消失了......感谢@ H2CO3提示。

Answer 2

有几个问题：

首先确保包含代码的文件：

tess = new TessBaseAPI();
tess->SimpleInit(...);

的文件扩展名为.mm（Objective-C ++），因为它使用了Objective-C和C ++。

其次，该库看起来尚未为armv7编译，因此您需要为要支持的任何体系结构重建它，这将是armv6中的一个或多个，{ {1}}，armv7和armv7s（适用于iPhone模拟器）。

如果你的目标是iOS 5.0+，那么除了i386之外，这将是上述所有内容，而Xcode的更高版本不支持这种情况。

第三，确保在库和应用程序中使用相同版本的C ++和C ++库，否则会发生不好的事情。

Answer 3

确保：

C ++语言方言集＆＃34;编译器默认＆＃34;而不是＆＃34; GNU ++ 11 [-std = gnu ++ 11]＆＃34;

C ++标准库集＆＃34;编译器默认＆＃34;而不是＆＃34; libc ++（支持C ++ 11的LLVM C ++标准库）＆＃34;

同时检查：

C语言方言集＆＃34; C00 [-std = c99]＆＃34;而不是＆＃34; GNU00 [-std = gnu99]＆＃34;

应该正确引用

和tesseract文件。（拖放文件无法正确引用）

Answer 4

ld: -weak_library and -bitcode_bundle (Xcode setting ENABLE_BITCODE=YES) cannot be used together
clang: error: linker command failed with exit code 1 (use -v to see invocation)

更改项目 - ＆gt;项目 - ＆gt;构建设置 - ＆gt; **“启用Bitcode” 没有
还删除“链接”中的所有链接器标志 - ＆gt; “其他链接标志” 并添加此

3.之后通过命令“pod install”安装pods

它适用于Swift 2和Xcode 7.2（beta）

iOS应用程序中Tesseract集成的错误

4 个答案: