Merge pull request #1479 from NativeScript/openFile-for-ios

openFile add for iOS

utils/utils.d.ts

@@ -188,6 +188,12 @@
          * Gets the iOS device major version (for 8.1 will return 8).
          */
         export var MajorVersion: number;
+
+        /**
+         * Opens file with associated application.
+         * @param filePath The file path.
+         */
+        export function openFile(filePath: string): boolean
     }
     /**
      * An utility function that copies properties from source object to target object.

utils/utils.ios.ts

@@ -3,6 +3,7 @@ import common = require("./utils-common");
 import colorModule = require("color");
 import enums = require("ui/enums");
 import * as typesModule from "utils/types";
+import * as fsModule from "file-system";
 
 global.moduleMerge(common, exports);
 
@@ -200,6 +201,21 @@ export module ios {
     }
 
     export var MajorVersion = NSString.stringWithString(UIDevice.currentDevice().systemVersion).intValue;
+
+    export function openFile(filePath: string): boolean {
+        try {
+            var fs: typeof fsModule = require("file-system");
+            var path = filePath.replace("~", fs.knownFolders.currentApp().path)
+
+            var controller = UIDocumentInteractionController.interactionControllerWithURL(NSURL.fileURLWithPath(path));
+            controller.delegate = new UIDocumentInteractionControllerDelegateImpl();
+            return controller.presentPreviewAnimated(true);
+        }
+        catch (e) {
+            console.error("Error in openFile", e);
+        }
+        return false;
+    }
 }
 
 export function GC() {
@@ -219,3 +235,24 @@ export function openUrl(location: string): boolean {
     }
     return false;
 }
+
+class UIDocumentInteractionControllerDelegateImpl extends NSObject implements UIDocumentInteractionControllerDelegate {
+    public static ObjCProtocols = [UIDocumentInteractionControllerDelegate];
+
+    public getViewController() : UIViewController {
+        var frame = require("ui/frame");
+        return frame.topmost().currentPage.ios;
+    }
+
+    public documentInteractionControllerViewControllerForPreview(controller: UIDocumentInteractionController) {
+        return this.getViewController();
+    }
+
+    public documentInteractionControllerViewForPreview(controller: UIDocumentInteractionController) {
+        return this.getViewController().view;
+    }
+
+    public documentInteractionControllerRectForPreview(controller: UIDocumentInteractionController): CGRect {
+        return this.getViewController().view.frame;
+    }
+}