添加NSPhotoLibraryAddUsageDescription，并更新readme

README-en.md

+Language: [English](https://github.com/zhouteng0217/ShareExtend/blob/master/README-en.md) | [中文简体](https://github.com/zhouteng0217/ShareExtend/blob/master/README.md)
+
+# ShareExtend
+
+[![pub package](https://img.shields.io/pub/v/share_extend.svg)](https://pub.dartlang.org/packages/share_extend)
+
+A Flutter plugin for iOS and Android for sharing text, image, video and file with system ui. 
+
+## Installation
+
+First, add `share_extend` as a dependency in your pubspec.yaml file.
+
+```
+dependencies:
+  share_extend: "^1.0.8"
+```
+
+### iOS
+
+Add the following key to your info.plist file, located in `<project root>/ios/Runner/Info.plist` for saving shared images to photo library.
+
+```
+<key>NSPhotoLibraryAddUsageDescription</key>
+<string>describe why your app needs access to write photo library</string>
+```
+
+### Android
+
+No configuration required.
+
+## Import
+
+```
+import 'package:share_extend/share_extend.dart';
+```
+
+
+## Example
+
+```
+
+//share text
+ShareExtend.share("share text", "text");
+
+//share image
+File f =
+    await ImagePicker.pickImage(source: ImageSource.gallery);
+ShareExtend.share(f.path, "image");
+
+//share video
+File f = await ImagePicker.pickVideo(
+        source: ImageSource.gallery);
+ShareExtend.share(f.path, "video");
+
+//share file
+Directory dir = await getApplicationDocumentsDirectory();
+File testFile = new File("${dir.path}/flutter/test.txt");
+if (!await testFile.exists()) {
+  await testFile.create(recursive: true);
+  testFile.writeAsStringSync("test for share documents file");
+}
+ShareExtend.share(testFile.path, "file"); 
+
+```
\ No newline at end of file

README.md

+Language: [English](https://github.com/zhouteng0217/ShareExtend/blob/master/README-en.md) | [中文简体](https://github.com/zhouteng0217/ShareExtend/blob/master/README.md)
+
 # ShareExtend
+
+[![pub package](https://img.shields.io/pub/v/share_extend.svg)](https://pub.dartlang.org/packages/share_extend)
+
 调用系统分享的Flutter组件，支持分享文本、图片、视频和文件
 
 ## 安装
 
 ```
 dependencies:
-  share_extend: "^1.0.7"
+  share_extend: "^1.0.8"
+```
+
+### iOS
+
+添加下面的key到工程的info.plist文件，路径 ```<project root>/ios/Runner/Info.plist```，用于将分享的图片保存到相册
+
 ```
+<key>NSPhotoLibraryAddUsageDescription</key>
+<string>这里填写为什么需要相写入册权限的描述语句</string>
+```
+
+### Android
+
+暂无特殊配置
+
 ## 导入
+
 ```
 import 'package:share_extend/share_extend.dart';
 ```
@@ -38,5 +58,4 @@ if (!await testFile.exists()) {
 }
 ShareExtend.share(testFile.path, "file"); 
 
-```
-
+```
\ No newline at end of file

example/ios/Runner/Info.plist

@@ -41,5 +41,7 @@
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
+	<key>NSPhotoLibraryAddUsageDescription</key>
+    <string>App needs photo library permission for saving images</string>
 </dict>
 </plist>

pubspec.yaml

 name: share_extend
-description: A flutter plugin to share text, image, file with system ui. It is compatible with both andorid and ios.
-version: 1.0.7
+description: A Flutter plugin for Android and iOS for sharing text, image, video and file with system ui.
+version: 1.0.8
 author: zhouteng <qfszyq@gmail.com>
 homepage: https://github.com/zhouteng0217/ShareExtend