1、摄像头和麦克风权限

Info.plist添加摄像头和麦克风权限。
https://blog.csdn.net/weixin_44350337/article/details/85492291

<key>NSPhotoLibraryUsageDescription</key>
<string>$请求访问相册</string>
<key>NSCameraUsageDescription</key>
<string>$请求使用摄像头</string>

Info.plist右键Open As -》Source Code

修改后，再选择使用Property List打开。

2、Pod文件引入WebRTC库

新建Podfile文件，输入内容

source'https://github.com/CocoaPods/Specs.git'
platform :ios,'11.0'
target 'WebRTC_IOS_Demo' do
   pod 'GoogleWebRTC'
end

然后安装。

先安装pod命令再引入

sudo chmod go-w /usr/local/bin
sudo gem install -n /usr/local/bin cocoapods
pod --version
pod install

sudo gem install -n /usr/local/bin cocoapods 该命令出错，描述如下：

charles@CharlesdeMac Documents % cat  /Library/Ruby/Gems/2.6.0/extensions/universal-darwin-19/2.6.0/ffi-1.15.3/mkmf.log
"pkg-config --exists libffi"
package configuration for libffi is not found
"xcrun clang -o conftest -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/universal-darwin19 -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/backward -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT    -g -Os -pipe -DHAVE_GCC_ATOMIC_BUILTINS conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib -L. -L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.Internal.sdk/usr/local/lib   -arch x86_64   -lruby.2.6   "
In file included from conftest.c:1:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby.h:33:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/ruby.h:24:10: fatal error: 'ruby/config.h' file not found
#include "ruby/config.h"
         ^~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/ruby.h:24:10: note: did not find header 'config.h' in framework 'ruby' (loaded from '/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks')
1 error generated.
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

先查看/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/universal-darwin19 发现文件不存在，然后发现当前目录的是universal-darwin20，所以这里建立软链接，命令如下

sudo ln -s /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/universal-darwin20 /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/universal-darwin19

建立完链接后，然后就可以直接安装pod了，安装完成后，查看版本

charles@CharlesdeMac Documents % pod --version
1.10.1
charles@CharlesdeMac Documents %

https://blog.csdn.net/weixin_43974890/article/details/103289838

安装

charles@CharlesdeMac WebRTC_IOS_Demo % pod install
Analyzing dependencies
Cloning spec repo `cocoapods` from `https://github.com/CocoaPods/Specs.git`
[!] Unable to add a source with url `https://github.com/CocoaPods/Specs.git` named `cocoapods`.
You can try adding it manually in `/Users/charles/.cocoapods/repos` or via `pod repo add`.
charles@CharlesdeMac WebRTC_IOS_Demo %

使用腾讯源
https://mirrors.cloud.tencent.com/CocoaPods/Specs.git