iOS报错命名空间“std”中的“unary_function”

1. "xxx/IntermediateBuildFilesPath/UninstalledProducts/iphoneos/xxxx" failed: No such file or directory

解决：Pods/Targets Support Files/Pods-App-frameworks.sh中

if [ -L "${source}" ]; then
    echo "Symlinked..."
    # source="$(readlink "${source}")"  修改为 source="$(readlink -f "${source}")" 
    source="$(readlink -f "${source}")" 
fi

2. DT_TOOLCHAIN_DIR cannot be used to evaluate LIBRARY_SEARCH_PATHS, use TOOLCHAIN_DIR instead.

解决：Podfile中添加如下处理：

post_install do |installer|
  installer.aggregate_targets.each do |target|
    target.xcconfigs.each do |variant, xcconfig|
      xcconfig_path = target.client_root + target.xcconfig_relative_path(variant)
      IO.write(xcconfig_path, IO.read(xcconfig_path).gsub("DT_TOOLCHAIN_DIR", "TOOLCHAIN_DIR"))
    end
  end

  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      if config.base_configuration_reference.is_a? Xcodeproj::Project::Object::PBXFileReference
        xcconfig_path = config.base_configuration_reference.real_path
        IO.write(xcconfig_path, IO.read(xcconfig_path).gsub("DT_TOOLCHAIN_DIR", "TOOLCHAIN_DIR"))
      end
    end
  end
end