Merge the code submitted by guoyongxin

package.json

@@ -1,6 +1,6 @@
 {
   "name": "cordova-plugin-mediapicker-dmcsdk",
-  "version": "2.4.0",
+  "version": "2.4.2",
   "description": "android ios mediaPicker support selection of multiple image and video",
   "cordova": {
     "id": "cordova-plugin-mediapicker-dmcsdk",

plugin.xml

@@ -1,13 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<plugin xmlns="http://apache.org/cordova/ns/plugins/1.0" xmlns:android="http://schemas.android.com/apk/res/android" id="cordova-plugin-mediapicker-dmcsdk" version="2.3.9">
+<plugin xmlns="http://apache.org/cordova/ns/plugins/1.0" xmlns:android="http://schemas.android.com/apk/res/android" id="cordova-plugin-mediapicker-dmcsdk" version="2.4.2">
   <name>MediaPicker</name>
   <js-module name="MediaPicker" src="www/MediaPicker.js">
     <clobbers target="window.MediaPicker"/>
   </js-module>
 
-  <preference name="IOS_PHOTO_LIBRARY_USAGE_DESCRIPTION" />
-
   <platform name="android">
     <config-file parent="/*" target="res/xml/config.xml">
       <feature name="MediaPicker">
@@ -25,6 +23,7 @@
 
 
   <platform name="ios">
+    <preference name="IOS_PHOTO_LIBRARY_USAGE_DESCRIPTION" />
     <config-file parent="/*" target="config.xml">
       <feature name="MediaPicker">
         <param name="ios-package" value="MediaPicker"/>

src/ios/DMCMediaPicker/DmcPickerViewController.m

@@ -204,8 +204,8 @@
         options.predicate = [NSPredicate predicateWithFormat:@"mediaType == %ld", PHAssetMediaTypeVideo];
     }
     
-    int defaultSelection = 0;
-    int i = 0;
+    int defaultSelection, i = 0; //为了进入选择界面默认显示CameraRoll下的图片
+
     for (PHFetchResult *fetchResult in allAlbums) {
         for (PHAssetCollection *collection in fetchResult) {
             // 有可能是PHCollectionList类的的对象，过滤掉