You can run a shortcut from another app to process content without leaving that app. You do this by making the shortcut accessible from other apps via the Share button 
.
For example, by tapping the Share button in another app, you can activate a shortcut to grab all the images from a page in Safari, convert a text file you’re viewing, or edit images in your Photos library.
To allow a shortcut to run from within other apps, you must enable it to appear in the share sheet—the window that appears when you tap the Share button in another app.
In the Shortcuts app on your iPhone or iPad, tap 
on a shortcut.
The shortcut opens in the shortcut editor.
Tap 
to open Details, then turn on Show in Share Sheet.
Tap Done.
A new action appears at the beginning of your workflow defining inputs the shortcut will accept.
The shortcut will now be available in other apps. To limit which apps your shortcut appears in, see Limit the input for a shortcut on iPhone or iPad.
After you’ve turned on Show in Share Sheet for a shortcut, you can run the shortcut from any app that has a Share button .
Select content in an app on your iPhone or iPad.
For example, depending on the shortcut you plan to run, you might select a block of text or an image.
Tap .
Scroll down to show available shortcuts.
Tap a shortcut button.
A shortcut notification appears, showing the progress of each action in the shortcut as it runs.
Note: If your shortcut isn’t available from the share sheet, the app may not have appropriate content to pass to the input of your shortcut. See Limit the input for a shortcut on iPhone or iPad.