I need to upgrade one project to Swift 3.0, that has some libraries by Cocodpods. So, I\'ve removed all links related with Cocoapods and recreate pod file using pod init and
try sudo gem install cocoapods --pre
the pod file should look like
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '10.0'
use_frameworks!
target 'YourAPP' do
pod 'Alamofire', '~> 4.0'
pod 'SwiftyJSON', :git => 'https://github.com/acegreen/SwiftyJSON.git', :branch => 'swift3'
pod 'NetReachability'
end