source 'https://github.com/CocoaPods/Specs.git'

target ‘123’ do

pod 'AFNetworking', '~> 3.1.0'

end

post_install do |installer|
    installer.pods_project.targets.each do |target|
        puts target.name
    end
end

打開舊版本的cocoa pods項目,報錯解決的方案
iOS "The sandbox is not in sync with the Podfile.lock"解決方案
關(guān)閉現(xiàn)在的工作空間，刪掉以前的xcworkspace，然后重新pod install，install完后，重新打開項目，clean＋build項目，運(yùn)行

先進(jìn)入你的項目文件夾
rm -rf MyProject.xcworkspace  
pod install  

參考文檔:
http://stackoverflow.com/a/19131855/3458781
http://blog.csdn.net/willyang519/article/details/40744081