Update README.md

README.md

     CoreMotion.framework
     CoreMedia.framework
     CoreTelephony.framework
+    
 TARGETS->Build Phases-> Link Binary With Libaries中点击“+”按钮，在弹出的窗口中点击“Add Other”按钮，选择
+
     node_modules/react-native-agora/ios/RCTAgora/libs/libcrypto.a
     node_modules/react-native-agora/ios/RCTAgora/libs/AgoraRtcCryptoLoader.framework
     node_modules/react-native-agora/ios/RCTAgora/libs/AgoraRtcEngineKit.framework
+    
 TARGETS->Build Settings->Search Paths->Framework Search Paths添加
+
     "$(SRCROOT)/../node_modules/react-native-agora/ios/RCTAgora/libs"
+    
 TARGETS->Build Settings->Search Paths->Library Search Paths添加
+
     "$(SRCROOT)/../node_modules/react-native-agora/ios/RCTAgora/libs"
+    
 TARGETS->Build Settings->Enable Bitcode设置为No
 
 TARGETS->Capabilities->Background Modes->Modes勾选Audio,AirPlay,and Picture In Picture
 
         //初始化Agora
         const options = {
-            appid: '',
+            appid: '前往Agora官网进行申请--https://www.agora.io/cn/',
             channelProfile: 1,
             videoProfile: 40,
             clientRole: 1,
     }
 
     handlerCancel = () => {
-
         RtcEngine.leaveChannel();
-
-        const {navigator} = this.props;
-        navigator.pop()
     };
 
     handlerSwitchCamera = () => {
         justifyContent: 'space-around'
     }
 });
-```
+```