feature: add mediaType to options in iOS

Author: tbozhikov

src/imagepicker.ios.ts

@@ -1,7 +1,7 @@
 import * as data_observable from "tns-core-modules/data/observable";
 import * as frame from "tns-core-modules/ui/frame";
 import * as imageAssetModule from "tns-core-modules/image-asset";
-import { Options } from ".";
+import { Options, ImagePickerMediaType } from ".";
 
 const defaultAssetCollectionSubtypes: NSArray<any> = NSArray.arrayWithArray(<any>[
     PHAssetCollectionSubtype.SmartAlbumRecentlyAdded,
@@ -27,7 +27,7 @@ export class ImagePicker extends data_observable.Observable {
 
         let imagePickerController = QBImagePickerController.alloc().init();
         imagePickerController.assetCollectionSubtypes = defaultAssetCollectionSubtypes;
-        imagePickerController.mediaType = QBImagePickerMediaType.Image;
+        imagePickerController.mediaType = options.mediaType ? <QBImagePickerMediaType>options.mediaType.valueOf() : QBImagePickerMediaType.Any;
         imagePickerController.delegate = this._imagePickerControllerDelegate;
         imagePickerController.allowsMultipleSelection = options.mode === 'multiple';
         imagePickerController.minimumNumberOfSelection = options.minimumNumberOfSelection || 0;

src/index.d.ts

@@ -16,6 +16,12 @@ export class ImagePicker {
     present(): Promise<ImageAsset[]>;
 }
 
+export declare const enum ImagePickerMediaType {
+    Any = 0,
+    Image = 1,
+    Video = 2
+}
+
 /**
  * Provide options for the image picker.
  */
@@ -49,12 +55,17 @@ interface Options {
      * Set the number of columns in Portrait in iOS
      */
     numberOfColumnsInPortrait?: number;
-    
+
     /**
      * Set the number of columns in Landscape in iOS
      */
     numberOfColumnsInLandscape?: number;
 
+    /**
+     * Set the media type (image/video/both) to pick in iOS
+     */
+    mediaType?: ImagePickerMediaType;
+
     android?: {
         /**
          * Provide a reason for permission request to access external storage on api levels above 23.