Merge pull request #165 from troyz/master

Make it possible to integration with an existing ios app

Picker.podspec

+require 'json'
+
+package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
+
+Pod::Spec.new do |s|
+
+  s.name           = 'Picker'
+  s.version        = package['version'].gsub(/v|-beta/, '')
+  s.summary        = package['description']
+  s.author         = package['author']
+  s.license        = package['license']
+  s.homepage       = package['homepage']
+  s.source         = { :git => 'https://github.com/beefe/react-native-picker.git', :tag => "v#{s.version}"}
+  s.platform       = :ios, '7.0'
+  s.preserve_paths = '*.js'
+
+  s.dependency 'React'
+
+  s.subspec 'Core' do |ss|
+    ss.source_files = 'ios/RCTBEEPickerManager/*.{h,m}'
+    ss.public_header_files = ['ios/RCTBEEPickerManager/*.h']
+  end
+
+end

README.md

@@ -80,6 +80,23 @@
 	
 ```
 
+### Integration With Existing Apps (`iOS`)
+The `Podfile` will like below:
+``` ruby
+platform :ios, '8.0'
+target 'YourTarget' do
+    pod 'React', :path => '../YOUR_REACT_NATIVE_PROJECT/node_modules/react-native', :subspecs => [
+    'Core',
+    ...
+    ]
+    pod 'Picker', :path => '../YOUR_REACT_NATIVE_PROJECT/node_modules/react-native-picker'
+end
+```
+After you have updated the `Podfile` of the existing app, you can install `react-native-picker` like below:
+``` bash
+$ pod install
+```
+
 ### Notice
 
 #### support two modes: