No, I don’t have any type of control over App B.
Can somehow App B save something in any shared directory …
If you don’t have any control over app B, how are you going to convince it to save some data in a shared location? Regardless, the iOS sandbox won’t allow this; there is no place on the file system when app B can write that app A can read.
The traditional approach for this sort of this is to have app B publish a URL scheme that app A can look for using
+[UIApplication canOpenURL:]
. However, if you have no control over app B then this will only work if app B already publishes a unique URL scheme.
IMPORTANT There have been some recent privacy-related changeds in this space; watch WWDC 2015 Session 703 Privacy and Your App for the details.
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—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
let myEmail = "eskimo" + "1" + "@apple.com"