ActionSheetIOS.showShareActionSheetWithOptions()

Display the iOS share sheet. The options object should contain one or both of message and url and can additionally have a subject or excludedActivityTypes:

• url (string) - a URL to share
• message (string) - a message to share
• subject (string) - a subject for the message
• excludedActivityTypes (array) - the activites to exclude from the ActionSheet

NOTE: if url points to a local file, or is a base64-encoded uri, the file it points to will be loaded and shared directly. In this way, you can share images, videos, PDF files, etc.