update readme

README.md

@@ -10,7 +10,7 @@ A set of tools written in swift to crop and trim videos.
 
 To run the example project, clone the repo, and run `pod install` from the Example directory first.
 
-### Trimming 
+### Trimming
 
 ![](https://media.giphy.com/media/GwZGkLiKxZcTm/giphy.gif)
 
@@ -31,9 +31,11 @@ it, simply add the following line to your Podfile:
 pod "PryntTrimmerView"
 ```
 
+For swift 3 compatibility, you can use version 1.0.1 or below.
+
 ## Usage
 
-### Trimming 
+### Trimming
 
 Create a `TrimmerView` instance (in interface builder or through code), and add it to your view hierarchy.
 
@@ -44,7 +46,7 @@ trimmerView.delegate = self
 
 Access the `startTime` and `endTime` property to know where to trim your asset. You can use the `TrimmerViewDelegate` to link the trimmer with an `AVPlayer` and provide the end user with a preview. See the `VideoTrimmerViewController` inside the project to see an example.
 
-You can also customize the trimmer view by changing its colors: 
+You can also customize the trimmer view by changing its colors:
 ```
 trimmerView.handleColor = UIColor.white
 trimmerView.mainColor = UIColor.orange
@@ -53,7 +55,7 @@ trimmerView.positionBarColor = UIColor.white
 
 ### Cropping
 
-Create an instance of the `VideoCropView` and add it to your view hierarchy, then load your video into the crop view: `videoCropView.asset = asset`. 
+Create an instance of the `VideoCropView` and add it to your view hierarchy, then load your video into the crop view: `videoCropView.asset = asset`.
 
 You can set the aspect ratio you want using the `setAspectRatio` method. Once you are satisfied with the portion of the asset you want to crop, call `getImageCropFrame` to retrieve the select frame. See the `VideoCropperViewController` in the example app for an actual example of how to crop the video for export.