Mail and Messages apps missing from iOS expo-sharing menu.

🐛 Bug Report

Environment

Expo CLI 3.18.6 environment info:
    System:
      OS: Linux 4.19 Manjaro Linux
      Shell: 5.0.16 - /bin/bash
    Binaries:
      Node: 13.13.0 - /usr/bin/node
      Yarn: 1.22.4 - /usr/bin/yarn
      npm: 6.14.4 - /usr/bin/npm
    IDEs:
      Android Studio: 3.6 AI-192.7142.36.36.6392135
    npmGlobalPackages:
      expo-cli: 3.18.6

iOS: 13.4.1

Steps to Reproduce

Use expo-sharing as documented. Code shown below.

Expected Behavior

Mail and Messages apps should be visible in the share menu in iOS.

Actual Behavior

Mail and Messages apps are not visible in the share menu in iOS. Every other app that I can share with is visible. This happens for every file type tested so far: PDF and “Office Spreadsheet”.

Reproducible Demo

NOTE: In later tests, I tried adding the UTI option of "com.adobe.pdf" to the call to shareAsync (imported from expo-sharing).

    const allowed = await isAvailableAsync();
    if (!allowed) {
      throw new Error("Not allowed");
    }
    let { url, fileName } = data;
    // NOTE: For iOS we had to replace all spaces in filename
    fileName = fileName.replace(/ /g, "_");
    const localFileUrl = await downloadUrl(url, fileName);
    const result = await shareAsync(localFileUrl);

Example value for localFileUrl being shared, from testing: file:///var/mobile/Containers/Data/Application/3C04E999-9999-432D-999B-8ADDA0E9999/Documents/ExponentExperienceData/%2540accountname%252Fapplicationname/Xxxxxx_Xxxx_99999999_99999999.pdf

Other notes

This might be the answer - https://stackoverflow.com/questions/46531572/uidocumentinteractioncontroller-does-not-open-other-app-in-ios-11/46937932#46937932

The problem was that I was trying to share a URL to a file inside the app bundle. It seems Apple’s apps have permission to access that URL but third-party apps don’t. I solved this by first copying the resource to the cache directory and then using that cache directory URL for sharing.

[waynebloss]

Here’s the answer - https://forums.expo.io/t/a-possible-way-to-show-a-share-menu-with-expo-without-detaching/9125/4

The code shows using the Share.share method from react-native:

                 Expo.FileSystem.downloadAsync(
                    urlToYourFile,
                    Expo.FileSystem.documentDirectory + `test.pdf`)
                    .then(({ uri }) => {
                      
                        Share.share({
                            url: uri,
                            title: 'title share',         
                        });
                    })
                    .catch(error => {
                        console.error(error);
                    });

So, I tried that in my experimental code - with import { Share } from "react-native"; and then making a special case for iOS:

  if (Platform.OS === "ios") {
      // Also for iOS, to show the Mail and Contacts sharing options, we need
      // use the bare React-Native facility to do that.
      // const result =
      await Share.share({
        message: fileName,
        title: "Share file",
        url: localFileUrl,
      });
      // console.log("Share.share result: ", result); // prints:
      //    Object {
      //      "action": "sharedAction",
      //      "activityType": "com.apple.UIKit.activity.Mail",
      //    }
    } else {
      // const result =
      await shareAsync(localFileUrl);
      // console.log("shareAsync result: ", result);
    }

It works!

[kidroca]

I have the exact same problem, copying the file to the FileSystem.cacheDirectory did not help using FileSystem.getContentUriAsync just returns the same file:// path

console.log('filePath: ', filePath);
const contentUri = await FileSystem.getContentUriAsync(filePath);
console.log('contentUri: ', contentUri);

await Sharing.shareAsync(contentUri, {
  dialogTitle,
  mimeType: 'application/pdf',
  UTI: 'com.adobe.pdf',
});

 filePath:  file:///var/mobile/Containers/Data/Application/DF32C1B1-1A8D-4890-8481-90C43D0CEB2A/Library/Caches/20200511-
MY123-1.pdf
contentUri:  file:///var/mobile/Containers/Data/Application/DF32C1B1-1A8D-4890-8481-90C43D0CEB2A/Library/Caches/2020051
1-MY123-1.pdf

This an ejected bare expo project, but the mail or messages option did not appear even before ejecting