docs: Fix the documentation of screen share on MobileCore-iOS

docs/ios-core/local-user/screen-share-guide.mdx

@@ -5,7 +5,8 @@ tags:
  - ios-core
 ---
 
-This document explains how to setup screen sharing on a iOS App using Dyte SDK
+This document explains how to setup screen sharing on a iOS App using Dyte SDK. 
+To use this feature one should join the meeting with **Presets** in which Screenshare is enabled.
 
 :::warning
 
@@ -16,9 +17,10 @@ This guide is being updated, and might not work as expected in its current form
 ## Overview
 
 1. Add a new Broadcast Upload Extension to your project.
-2. Setup app groups
-3. Have your SampleHandler class initialize DyteBroadcastHandler and proxy a few methods.
-4. Update Info.plist
+2. Setup app groups.
+3. Download `DyteSampleHandler` class from [Github repo](https://github.com/dyte-io/iOS-ScreenShare) .
+4. Have your SampleHandler class inherited from this downloaded class `DyteSampleHandler` .
+5. Update Info.plist.
 
 ### Add a new Broadcast Upload Extension to your project.
 
@@ -43,67 +45,42 @@ Add your extension to an app group by going to your extension's target in the pr
 import ReplayKit
 import DyteiOSCore
 
-class SampleHandler: RPBroadcastSampleHandler {
-
- let dyteBroadcast: DyteBroadcastHandler = DyteBroadcastHandler();
-
- override init() {
- super.init()
- }
- override func broadcastPaused() {
- dyteBroadcast.broadcastPaused()
- }
-
- override func broadcastResumed() {
- dyteBroadcast.broadcastResumed()
- }
-
- override func broadcastFinished() {
- dyteBroadcast.broadcastFinished()
- }
-
- override func broadcastStarted(withSetupInfo setupInfo: [String : NSObject]?) {
- dyteBroadcast.broadcastStartedWithSetupInfo(setupInfo: setupInfo)
- }
-
- override func processSampleBuffer(_ sampleBuffer: CMSampleBuffer, with sampleBufferType: RPSampleBufferType) {
- let rawPointer = Unmanaged.passUnretained(sampleBuffer).toOpaque()
- dyteBroadcast.processSampleBuffer(sampleBuffer: rawPointer, withType: Int64(sampleBufferType.rawValue))
-
- }
-
-}
+class SampleHandler: DyteSampleHandler {}
 ```
 
 ### Modify Info.plist
 
-Make sure **both of them** (App and Extension Info.plist) contains these keys
+Make sure **both of them** (App and Extension Info.plist) contains below key.
 
 ```
  <key>RTCAppGroupIdentifier</key>
  <string>(name of the group)</string>
- <key>RTCScreenSharingExtension</key>
- <string>(Bundle Identifier)</string>
+```
+
+Add below key inside the Info.plist of the main App.
+
+```
+<key>RTCScreenSharingExtension</key>
+ <string>(Bundle Identifier of the Broadcast upload extension)</string>
 ```
 
 ![Info.plist screenshot](/static/mobile/0.x.x/ios-setup-info.png)
 
 ### Start the Screenshare
 
-Launch the broadcast extension and call the method `enableScreenshare()`
+To Launch the broadcast extension and call the method `enableScreenshare()`
 
 ```swift
+dyteClient.localUser.enableScreenshare()
+```
 
-let screenShareExtensionId = Bundle.main.infoDictionary?["RTCScreenSharingExtension"] as? String;
-let view = RPSystemBroadcastPickerView()
-view.preferredExtension = screenShareExtensionId
-view.showsMicrophoneButton = false
-let selector = NSSelectorFromString("buttonPressed:")
-if view.responds(to: selector) {
- view.perform(selector, with: nil)
-}
+### Stop the Screenshare
 
-dyteClient.localUser.enableScreenshare()
+To stop the ongoing screenshare and call the method `disableScreenshare()`. This will show the system
+alert with a stop button for stopping screen share.
+
+```swift
+dyteClient.localUser.disbaleScreenshare()
 ```
 
 ![screenshot](/static/mobile/0.x.x/ios-setup-app.png)