cocoapod相关

1.cocoa pod  官方地址：https://cocoapods.org

2.install：sudo gem install cocoa pods

3.pod 内容：

platform :ios, '8.0'

use_frameworks!

target 'MyApp' do

  pod 'AFNetworking', '~> 2.6'

  pod 'ORStackView', '~> 3.0'

  pod 'SwiftyJSON', '~> 2.3'

end

4.pod init 创建pod file