openDocument&previewDocument utf8

Supports file names in more languages

src/ios/RNFetchBlob/RNFetchBlob.m

@@ -440,8 +440,9 @@ RCT_EXPORT_METHOD(slice:(NSString *)src dest:(NSString *)dest start:(nonnull NSN
 
 RCT_EXPORT_METHOD(previewDocument:(NSString*)uri scheme:(NSString *)scheme resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject
 {
-    
-    NSURL * url = [[NSURL alloc] initWithString:uri];
+    NSString * utf8uri = [uri stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
+    NSURL * url = [[NSURL alloc] initWithString:utf8uri];
+    // NSURL * url = [[NSURL alloc] initWithString:uri];
     documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
     UIViewController *rootCtrl = [[[[UIApplication sharedApplication] delegate] window] rootViewController];
     documentController.delegate = self;
@@ -459,8 +460,9 @@ RCT_EXPORT_METHOD(previewDocument:(NSString*)uri scheme:(NSString *)scheme resol
 
 RCT_EXPORT_METHOD(openDocument:(NSString*)uri scheme:(NSString *)scheme resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject
 {
-    
-    NSURL * url = [[NSURL alloc] initWithString:uri];
+    NSString * utf8uri = [uri stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
+    NSURL * url = [[NSURL alloc] initWithString:utf8uri];
+    // NSURL * url = [[NSURL alloc] initWithString:uri];
     documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
     documentController.delegate = self;