Update readme

Author: MarioIannotta

README.md

@@ -17,19 +17,19 @@ Create your own pull up controller with multiple sticky points like in iOS Maps
 # Setup
 1. Add `pod 'PullUpController'` to your Podfile or copy `PullUpController.swift` into your project
 2. Make sure the view controller that will be your pull up controller inherits from `PullUpController`
-3. Add the controller as child of your main controller using `addPullUpController(<#T##PullUpController#>)`
+3. Add the controller as child of your main controller using `addPullUpController(<#T##PullUpController#>, initialStickyPointOffset: <#T##CGFloat#>, animated: <#T##Bool#>)`
 
 # Customization
 You can customize the controller behavior by overriding the followings properties:
 
-`pullUpControllerPreviewOffset: CGFloat`
->The desired height in screen units expressed in the pull up controller coordinate system that will be initially showed.
->The default value is ```50```
-
 `pullUpControllerPreferredSize: CGSize`
 >The desired size of the pull up controller’s view, in screen units.
 >The default value is width: `UIScreen.main.bounds.width, height: 400`.
 
+`pullUpControllerPreferredLandscapeFrame: CGRect`
+>The desired size of the pull up controller’s view, in screen units when the device is in landscape mode.
+>The default value is `(x: 10, y: 10, width: 300, height: UIScreen.main.bounds.height - 20)`.
+
 `pullUpControllerMiddleStickyPoints: [CGFloat]`
 >A list of y values, in screen units expressed in the pull up controller coordinate system.
 >At the end of the gestures the pull up controller will scroll to the nearest point in the list.
@@ -39,19 +39,11 @@ You can customize the controller behavior by overriding the followings propertie
 >    
 >For a complete list of all the sticky points you can use `pullUpControllerAllStickyPoints`
 
-`pullUpControllerAllStickyPoints: [CGFloat]`
->A list of y values, in screen units expressed in the pull up controller coordinate system.
->At the end of the gesture the pull up controller will scroll at the nearest point in the list.
-
 `pullUpControllerIsBouncingEnabled: Bool`
 >A Boolean value that determines whether bouncing occurs when scrolling reaches the end of the pull up controller's view size.
 >The default value is `false`.
 
-`pullUpControllerPreferredLandscapeFrame: CGRect`
->The desired size of the pull up controller’s view, in screen units when the device is in landscape mode.
->The default value is `(x: 10, y: 10, width: 300, height: UIScreen.main.bounds.height - 20)`.
-
-It's possible to change the view controller's view position by using the method
+It's possible to change the view controller's view position programmatically by using the method
 `pullUpControllerMoveToVisiblePoint(_ visiblePoint: CGFloat, completion: (() -> Void)?)`
 
 >This method will move the pull up controller's view in order to show the provided visible point.
@@ -60,6 +52,15 @@ It's possible to change the view controller's view position by using the method
 >- `visiblePoint`: the y value to make visible, in screen units expressed in the pull up controller coordinate system.
 >- `completion`: The closure to execute after the animation is completed. This block has no return value and takes no parameters. You may specify nil for this parameter.
 
+By overriding the following method it is possible to customize all the animations performed by the controller's view.
+
+`pullUpControllerAnimate(withDuration duration: TimeInterval, animations: @escaping () -> Void, completion: ((Bool) -> Void)?)`
+
+To observe the PullUpController's view state there're some usefull callbacks such as:
+- `willMoveToStickyPoint: ((_ point: CGFloat) -> Void)?`
+- `didMoveToStickyPoint: ((_ point: CGFloat) -> Void)?`
+- `onDrag: ((_ point: CGFloat) -> Void)?`
+
 PullUpController is easy draggable even if your `PullUpController`'s view contains a `UIScrollView`, just attach it to the controller itself with the following method:
 `<#T##UIScrollView#>.attach(to: <#T##PullUpController#>)`
 >Attach the scroll view to the provided pull up controller in order to move it with the scroll view content.