Update the Readme with screenshot

AVIFQuickLook/GeneratePreviewForURL.m

@@ -31,8 +31,6 @@ OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview,
         // Add image dimensions to title
         NSString *newTitle = [NSString stringWithFormat:@"%@ (%d x %d)", [path lastPathComponent], (int)width, (int)height];
 
-        //        NSLog(@"Options: %@", [(__bridge NSDictionary *)options description]);
-
         NSDictionary *newOpt = @{   (NSString *)kQLPreviewPropertyDisplayNameKey : newTitle,
             (NSString *)kQLPreviewPropertyWidthKey : @(width),
             (NSString *)kQLPreviewPropertyHeightKey : @(height) };

README.md

@@ -1,2 +1,46 @@
 # AVIFQuickLook
-AVIF QuickLook plugin on macOS
+
+![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg?style=flat) [![Build Status](https://travis-ci.com/dreampiggy/AVIFQuickLook.svg?branch=master)](https://travis-ci.com/dreampiggy/AVIFQuickLook)
+
+This is the **macOS QuickLook** plugin for [AVIF (AV1 Image File Format)](https://aomediacodec.github.io/av1-avif/).
+
+## Quick Look the image
+
+![](https://raw.githubusercontent.com/dreampiggy/AVIFQuickLook/master/Screenshot/Thumbnails.png)
+
+## Generate Finder thumbnails
+
+![](https://raw.githubusercontent.com/dreampiggy/AVIFQuickLook/master/Screenshot/Preview.png)
+
+These images are from [AVIF Specification Test Files](https://github.com/AOMediaCodec/av1-avif/blob/master/testFiles/)
+
+## Requirements
+
++ macOS 10.10+
+
+## Install
+
+1. Grab the latest `AVIFQuickLook.qlgenerator` from the [Release Page](https://github.com/dreampiggy/AVIFQuickLook/releases/latest), or build using Xcode.
+2. Open Finder
+3. `Shift + Command + G`, input `~/Library/QuickLook/` and press Enter
+4. Drag `AVIFQuickLook.qlgenerator` into this folder. You may need to enter the password
+
+## Uninstall
+
+1. Open Finder
+2. `Shift + Command + G`, input `~/Library/QuickLook/` and press Enter
+3. Delete `AVIFQuickLook.qlgenerator`
+
+## Author
+
+DreamPiggy, lizhuoli1126@126.com
+
+## License
+
+This project is released under the *MIT license*, see **LICENSE**.
+
+## Thanks
+
++ [libavif](https://github.com/joedrago/avif)
++ [aom](https://aomedia.googlesource.com/aom/)
+