objective c - iOS - open photo from photo album in my app

Question

I would like to let users browse photos in their photo albums, tap the action button, and share/open selected photos in my app. Some apps (like Viber and WeChat) provide a custom view to handle this. This is the WeChat screen:

What is the name of this feature and which class do I have to use to achieve this behavior?

Answer 1

You need to do check for share option in the ioS extensions

1. app extensions
2. extension programming guide
3. Share extension
4. Example from Tumbler developer team