simplest possible fix for #311 (#313)

ios/RNFetchBlob/RNFetchBlob.m

@@ -300,7 +300,7 @@ RCT_EXPORT_METHOD(ls:(NSString *)path callback:(RCTResponseSenderBlock) callback
 #pragma mark - fs.stat
 RCT_EXPORT_METHOD(stat:(NSString *)target callback:(RCTResponseSenderBlock) callback)
 {
-    
+
     [RNFetchBlobFS getPathFromUri:target completionHandler:^(NSString *path, ALAssetRepresentation *asset) {
         __block NSMutableArray * result;
         if(path != nil)
@@ -309,14 +309,14 @@ RCT_EXPORT_METHOD(stat:(NSString *)target callback:(RCTResponseSenderBlock) call
             BOOL exist = nil;
             BOOL isDir = nil;
             NSError * error = nil;
-            
+
             exist = [fm fileExistsAtPath:path isDirectory:&isDir];
             if(exist == NO) {
                 callback(@[[NSString stringWithFormat:@"failed to stat path `%@` for it is not exist or it is not exist", path]]);
                 return ;
             }
             result = [RNFetchBlobFS stat:path error:&error];
-            
+
             if(error == nil)
                 callback(@[[NSNull null], result]);
             else
@@ -375,7 +375,7 @@ RCT_EXPORT_METHOD(lstat:(NSString *)path callback:(RCTResponseSenderBlock) callb
 #pragma mark - fs.cp
 RCT_EXPORT_METHOD(cp:(NSString*)src toPath:(NSString *)dest callback:(RCTResponseSenderBlock) callback)
 {
-    
+
 //    path = [RNFetchBlobFS getPathOfAsset:path];
     [RNFetchBlobFS getPathFromUri:src completionHandler:^(NSString *path, ALAssetRepresentation *asset) {
         NSError * error = nil;
@@ -387,14 +387,14 @@ RCT_EXPORT_METHOD(cp:(NSString*)src toPath:(NSString *)dest callback:(RCTRespons
         else
         {
             BOOL result = [[NSFileManager defaultManager] copyItemAtURL:[NSURL fileURLWithPath:path] toURL:[NSURL fileURLWithPath:dest] error:&error];
-            
+
             if(error == nil)
                 callback(@[[NSNull null], @YES]);
             else
                 callback(@[[error localizedDescription], @NO]);
         }
     }];
-    
+
 }
 
 
@@ -456,7 +456,7 @@ RCT_EXPORT_METHOD(readStream:(NSString *)path withEncoding:(NSString *)encoding
         else
             bufferSize = 4096;
     }
-    
+
     dispatch_async(fsQueue, ^{
         [RNFetchBlobFS readStream:path encoding:encoding bufferSize:bufferSize tick:tick streamId:streamId bridgeRef:_bridge];
     });
@@ -482,7 +482,7 @@ RCT_EXPORT_METHOD(cancelRequest:(NSString *)taskId callback:(RCTResponseSenderBl
 #pragma mark - net.enableProgressReport
 RCT_EXPORT_METHOD(enableProgressReport:(NSString *)taskId interval:(nonnull NSNumber*)interval count:(nonnull NSNumber*)count)
 {
-    
+
     RNFetchBlobProgress * cfg = [[RNFetchBlobProgress alloc] initWithType:Download interval:interval count:count];
     [RNFetchBlobNetwork enableProgressReport:taskId config:cfg];
 }
@@ -509,9 +509,10 @@ RCT_EXPORT_METHOD(previewDocument:(NSString*)uri scheme:(NSString *)scheme resol
     UIViewController *rootCtrl = [[[[UIApplication sharedApplication] delegate] window] rootViewController];
     documentController.delegate = self;
     if(scheme == nil || [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:scheme]]) {
-        dispatch_sync(dispatch_get_main_queue(), ^{
-            [documentController  presentOptionsMenuFromRect:rootCtrl.view.bounds inView:rootCtrl.view animated:YES];
-        });
+      CGRect rect = CGRectMake(0.0, 0.0, 0.0, 0.0);
+      dispatch_sync(dispatch_get_main_queue(), ^{
+          [documentController  presentOptionsMenuFromRect:rect inView:rootCtrl.view animated:YES];
+      });
         resolve(@[[NSNull null]]);
     } else {
         reject(@"RNFetchBlob could not open document", @"scheme is not supported", nil);
@@ -527,7 +528,7 @@ RCT_EXPORT_METHOD(openDocument:(NSString*)uri scheme:(NSString *)scheme resolver
     // NSURL * url = [[NSURL alloc] initWithString:uri];
     documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
     documentController.delegate = self;
-    
+
     if(scheme == nil || [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:scheme]]) {
         dispatch_sync(dispatch_get_main_queue(), ^{
             [documentController presentPreviewAnimated:YES];
@@ -550,7 +551,7 @@ RCT_EXPORT_METHOD(excludeFromBackupKey:(NSString *)url resolver:(RCTPromiseResol
     } else {
         reject(@"RNFetchBlob could not open document", [error description], nil);
     }
-    
+
 }