cocoapods教程，内容很详细：传送门
cocoapods pod install被墙更换为一下命令：
pod install --verbose --no-repo-update
pod update --no-repo-update
pod repo update
旧版本swift，Xcode8报错：swift报错 Use Legacy Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit > Convert > To Current Swift Syntax…] menu to choose a Swift version or use the Build Settings editor to configure the build setting directly 解决办法：传送门
添加第三方SnapKIt框架报错：
