Make Polyfill module private.

Author: tang3w

LeanCloud.podspec

@@ -14,6 +14,7 @@ Pod::Spec.new do |s|
 
   s.subspec 'Foundation' do |ss|
     ss.source_files = 'Sources/Foundation/**/*.{h,m,swift}'
+    ss.private_header_files = 'Sources/Foundation/Polyfill/Polyfill.h'
     ss.pod_target_xcconfig = { 'SWIFT_INCLUDE_PATHS' => '"$(PODS_TARGET_SRCROOT)"/**' }
     ss.preserve_paths = 'Sources/Foundation/**/*.{modulemap}'
   end

Sources/Foundation/Lazyload.swift

@@ -7,7 +7,7 @@
 //
 
 import Foundation
-import Polyfill
+import Polyfill.Private
 
 extension NSObject {
 

Sources/Foundation/Polyfill/module.modulemap

@@ -1,4 +1,3 @@
 module Polyfill {
-    header "Polyfill.h"
     export *
 }

Sources/Foundation/Polyfill/module.private.modulemap

@@ -0,0 +1,4 @@
+explicit module Polyfill.Private {
+    header "Polyfill.h"
+    export *
+}