错误一：In file includedfromViewController.m:9:**./ViewController.h:9:9: ****fatal error: ****'UIKit/UIKit.h'filenotfound**#import <UIKit/UIKit.h>** ^**1error generated.

1、进入终端，键入命令vim ~/.bash_profile

2、在vim界面输入i进入编辑编辑状态并且键入：alias rewriteoc='clang -x objective-c -rewrite-objc -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk'

3、键入完毕，点esc退出编辑状态，再键入:wq退出vim并保存，执行source ~/.bash_profile<-这句一定要执行，执行才会生效

错误二： 'UIWebView' is unavailable: not available on macOS

解决办法：

指定真机

xcrun -sdk iphoneos clang -rewrite-objc ViewController.m

指定模拟器

xcrun -sdk iphonesimulator clang -rewrite-objc ViewController.m

指定SDK版本

xcrun -sdk iphonesimulator10.3 clang -rewrite-objc ViewController.m

Ç语言转C ++

    zhangquaniMac:~ zq$ cd /Users/zq/Desktop/Test/Test

    zhangquaniMac:Test zq$ clang -rewrite-objc main.c

参考：

HTTPS：//cotin.tech/iOS/clang-rewrite-objc/

https://blog.csdn.net/qq_34003239/article/details/84230019

https://www.jianshu.com/p/43a09727eb2c