Update README.md

Unknoob · Mar 31, 2018 · ea2912c · ea2912c
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@@ -38,3 +38,35 @@ $ tree Rome/
 Rome/
 └── Alamofire.framework
 ```
+
+## Hooks
+
+The plugin allows you to provides hooks that will be called during the installation process.
+
+### pre_compile
+
+This hook allows you to make any last changes to the generated Xcode project before the compilation of frameworks begins.
+
+It receives the `Pod::Installer` as its only argument.
+
+#### Example
+
+Customising the Swift version of all pods
+
+```ruby
+platform :osx, '10.10'
+
+plugin 'cocoapods-rome', :pre_compile => Proc.new { |installer|
+    installer.pods_project.targets.each do |target|
+        target.build_configurations.each do |config|
+            config.build_settings['SWIFT_VERSION'] = '4.0'
+        end
+    end
+
+    installer.pods_project.save
+}
+
+target 'caesar' do
+    pod 'Alamofire'
+end
+```