cocoa 异常

运行：pod install 时：
Analyzing dependencies
[!] The dependency `AFNetworking (~> 2.6)` is not used in any concrete larget.

# Xcode 7 + 8$ sudo gem install cocoapods --pre# Xcode 7sudo gem install activesupport -v 4.2.6sudo gem install cocoa pods

vim Podfile中：
platform :ios, '7.0'
target "SwiftWeather" do
pod 'AFNetworking'
end