Add IOS UIDocumentInteractionController APIs #108

src/index.js

 import base64 from 'base-64'
 import polyfill from './polyfill'
 import android from './android'
+import ios from './ios'
 import JSONStream from './json-stream'
 const {
   RNFetchBlobSession,
   fetch,
   base64,
   android,
+  ios,
   config,
   session,
   fs,

src/ios.js

+// Copyright 2016 wkh237@github. All rights reserved.
+// Use of this source code is governed by a MIT-style license that can be
+// found in the LICENSE file.
+// @flow
+
+import {
+  NativeModules,
+  DeviceEventEmitter,
+  Platform,
+  NativeAppEventEmitter,
+} from 'react-native'
+
+const RNFetchBlob:RNFetchBlobNative = NativeModules.RNFetchBlob
+
+/**
+ * Open a file using UIDocumentInteractionController
+ * @param  {string]} path Path of the file to be open.
+ * @param  {string} scheme URI scheme that needs to support, optional
+ * @return {Promise}
+ */
+function openDocument(path:string, scheme:string) {
+  if(Platform.OS === 'ios')
+    return RNFetchBlob.openDocument(path, scheme)
+  else
+    return Promise.reject('RNFetchBlob.openDocument only supports IOS.')
+}
+
+/**
+ * Preview a file using UIDocumentInteractionController
+ * @param  {string]} path Path of the file to be open.
+ * @param  {string} scheme URI scheme that needs to support, optional
+ * @return {Promise}
+ */
+function previewDocument(path:string, scheme:string) {
+  if(Platform.OS === 'ios')
+    return RNFetchBlob.previewDocument(path, scheme)
+  else
+    return Promise.reject('RNFetchBlob.previewDocument only supports IOS.')
+}
+
+export default {
+  openDocument,
+  previewDocument
+}

src/ios/RNFetchBlob/RNFetchBlob.h

 #ifndef RNFetchBlob_h
 #define RNFetchBlob_h
 #import "RCTBridgeModule.h"
+#import <UIKit/UIKit.h>
 
 
-@interface RNFetchBlob : NSObject <RCTBridgeModule> {
+@interface RNFetchBlob : NSObject <RCTBridgeModule, UIDocumentInteractionControllerDelegate> {
 
     NSString * filePathPrefix;
 
 }
 
 @property (nonatomic) NSString * filePathPrefix;
-
+@property (nonatomic, strong) UIDocumentInteractionController *documentController;
 
 @end
 

src/ios/RNFetchBlob/RNFetchBlob.m

 @implementation RNFetchBlob
 
 @synthesize filePathPrefix;
+@synthesize documentController;
 @synthesize bridge = _bridge;
 
 - (dispatch_queue_t) methodQueue {
     [RNFetchBlobFS slice:src dest:dest start:start end:end encode:@"" resolver:resolve rejecter:reject];
 })
 
-RCT_EXPORT_METHOD(openFile:(NSString*)uri {
-    [[[RNFetchBlobFS alloc ] init ]openFile:uri];
+RCT_EXPORT_METHOD(openDocument:(NSString*)uri scheme:(NSString *)scheme resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject
+{
+    
+    NSURL * url = [[NSURL alloc] initWithString:uri];
+    documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
+    UIViewController *rootCtrl = [[[[UIApplication sharedApplication] delegate] window] rootViewController];
+    documentController.delegate = self;
+    if(scheme == nil || [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:scheme]]) {
+        [documentController  presentOpenInMenuFromRect:rootCtrl.view.bounds inView:rootCtrl.view animated:YES];
+        resolve(@[[NSNull null]]);
+    } else {
+        reject(@"RNFetchBlob could not open document", @"scheme is not supported", nil);
+    }
 })
 
+# pragma mark - open file with UIDocumentInteractionController and delegate
+
+RCT_EXPORT_METHOD(previewDocument:(NSString*)uri scheme:(NSString *)scheme resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject
+{
+    
+    NSURL * url = [[NSURL alloc] initWithString:uri];
+    documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
+    documentController.delegate = self;
+    
+    if(scheme == nil || [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:scheme]]) {
+        [documentController presentPreviewAnimated:YES];
+        resolve(@[[NSNull null]]);
+    } else {
+        reject(@"RNFetchBlob could not open document", @"scheme is not supported", nil);
+    }
+})
+
+- (UIViewController *) documentInteractionControllerViewControllerForPreview: (UIDocumentInteractionController *) controller {
+    UIWindow *window = [UIApplication sharedApplication].keyWindow;
+    return window.rootViewController;
+}
+
+
 #pragma mark RNFetchBlob private methods
 
 

src/ios/RNFetchBlobFS.h

 
 #import <Foundation/Foundation.h>
 #import "RCTBridgeModule.h"
-#import <UIKit/UIKit.h>
 @import AssetsLibrary;
 
-@interface RNFetchBlobFS : NSObject <NSStreamDelegate, UIDocumentInteractionControllerDelegate>  {
+@interface RNFetchBlobFS : NSObject <NSStreamDelegate>  {
     NSOutputStream * outStream;
     NSInputStream * inStream;
     RCTResponseSenderBlock callback;

src/ios/RNFetchBlobFS.m

 //  File system access methods
 //
 ////////////////////////////////////////
-
+@interface RNFetchBlobFS() {
+    UIDocumentInteractionController * docCtrl;
+}
+@end
 @implementation RNFetchBlobFS
 
 
     }
 }
 
-# pragma mark - open file with UIDocumentInteractionController and delegate
-
-- (void) openFile:(NSString *) uri
-{
-    NSURL * url = [[NSURL alloc] initWithString:uri];
-    UIDocumentInteractionController * docCtrl = [UIDocumentInteractionController interactionControllerWithURL:url];
-    docCtrl.delegate = self;
-    [docCtrl presentPreviewAnimated:YES];
-    
-}
-
-- (UIViewController *) documentInteractionControllerViewControllerForPreview: (UIDocumentInteractionController *) controller {
-    return self;
-}
-
 @end