Adding local patch to Podfile

pod_patch.rb

# Save this file to the same directory of the Podfile
module PodPatch
  def self.apply(installer, patch_target, diff_file)
    sandbox_state = installer.analysis_result.sandbox_state
    installer.pods_project.targets.each do |target|
      pods_to_install = sandbox_state.added | sandbox_state.changed
      if target.name == patch_target and pods_to_install.include?(patch_target)
        cmd = <<-SHELL
          if [ -n "$PODS_ROOT" ]; then
            cd "$PODS_ROOT"/Pods/#{patch_target}
          else
            cd Pods/#{patch_target}
          fi
          patch -N -r - -p1 < #{Dir.pwd}/#{diff_file}
        SHELL
        system(cmd)
      end
    end
  end
end

Podfile

platform :ios, '8.0'

# Add this line to the headding of the Podfile
require './pod_patch'

target 'YourProject' do
  pod 'PodNameForPatch'
  
  # And add the patch instructions
  pod 'PodNameForPatch'
  post_install do |installer|
    PodPatch.apply installer, 'PodNameForPatch', "files/patches/PodNameForPatch.diff"
  end
end