1.Could Not build module 'xxx'
解決：change In target setting the "Allow Non-modular Includes in Framework modules" setting to YES.
2.Use of '@import' when C++ modules are disabled, consider using -fmodules and -fcxx-modul
解決：在target-build settings - Apple Clang - Custom Compiler Flags ，將Other C++ Flags選項debug和release加上-fcxx-modules
解決：在target-build settings - Apple Clang - Language，將Compile Sources As改為Objective-C++
4. [!] CocoaPods did not set the base configuration of your project because your project already has a custom config set. In order for CocoaPods integration to work at all, please either set the base configurations of the target `xxxxxx` to `Target Support Files/Pods-xxxxxx/Pods-xxxxxx.debug.xcconfig` or include the `Target Support Files/Pods-xxxxxx/Pods-xxxxxx.debug.xcconfig` in your build configuration (`ios/UserConfigIOS.debug.xcconfig`).
解決：修改debug.xcconfig文件，增加
#include "../Pods/Target Support Files/Pods-xxxxxx/Pods-xxxxxx.debug.xcconfig"，xxxxx為targets名。
release文件同樣方式修改。
5. Cannot synthesize weak property in file using manual reference counting
解決：Weak Reference In Manual Retain Release 改為 YES
6.Xcode fails to build: “Unable to resolve build file: XCBCore.BuildFile”
解決：XCode > Preferences > Locations > Derived Data目錄，刪除模擬器緩存文件，退出xcode重新打開再編譯