ld: building for iOS Simulator, but linking in dylib built for iOS, file '/Users/zd/Desktop/PodRepository/.../AFNetworking.framework/AFNetworking' for architecture arm64
发生上面的错误时，在podspec中添加 s.pod_target_xcconfig = { 'VALID_ARCHS' => 'x86_64 armv7 arm64' },反正支持你需要的类型就可以了，pod lib lint不支持i386。
