Safely call the result block

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 8.1.4
+### iOS
+- Fixes a crash when sometimes user swipe the modal down and call it again. [1357](https://github.com/miguelpruivo/flutter_file_picker/issues/1357)
+
 ## 8.1.3
 ### Android
 - Fixes a null object reference error [#1604](https://github.com/miguelpruivo/flutter_file_picker/issues/1604)

ios/Classes/FilePickerPlugin.m

@@ -665,26 +665,32 @@ - (void)presentationControllerDidDismiss:(UIPresentationController *)controller
 #ifdef PICKER_AUDIO
 - (void)mediaPickerDidCancel:(MPMediaPickerController *)controller {
     Log(@"FilePicker canceled");
-    _result(nil);
-    _result = nil;
+    if (self.result != nil) {
+        self.result(nil);
+        self.result = nil;
+    }
     [controller dismissViewControllerAnimated:YES completion:NULL];
 }
 #endif // PICKER_AUDIO
 
 #ifdef PICKER_DOCUMENT
 - (void)documentPickerWasCancelled:(UIDocumentPickerViewController *)controller {
     Log(@"FilePicker canceled");
-    _result(nil);
-    _result = nil;
+    if (self.result != nil) {
+        self.result(nil);
+        self.result = nil;
+    }
     [controller dismissViewControllerAnimated:YES completion:NULL];
 }
 #endif // PICKER_DOCUMENT
 
 #ifdef PICKER_MEDIA
 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
     Log(@"FilePicker canceled");
-    _result(nil);
-    _result = nil;
+    if (self.result != nil) {
+        self.result(nil);
+        self.result = nil;
+    }
     [picker dismissViewControllerAnimated:YES completion:NULL];
 }
 #endif

pubspec.yaml

@@ -3,7 +3,7 @@ description: A package that allows you to use a native file explorer to pick sin
 homepage: https://github.com/miguelpruivo/plugins_flutter_file_picker
 repository: https://github.com/miguelpruivo/flutter_file_picker
 issue_tracker: https://github.com/miguelpruivo/flutter_file_picker/issues
-version: 8.1.3
+version: 8.1.4
 
 dependencies:
   flutter: