UIApplication.canOpenURL does not respect hidden Maps.app

Number:rdar://31680034 Date Originated:18-Apr-2017 03:41 PM
Status:Open Resolved:
Product:iOS + SDK Product Version:iOS 10.3.1
Classification:Other Bug Reproducible:Always
The docs contain this sentence regarding to UIApplication.canOpenURL:

> When this method returns true, iOS guarantees that subsequent calls to the openURL(_:) method with the same URL will successfully launch an app that can handle that URL.

If however the user has Maps.app "uninstalled" (as in hidden) a subsequent call to open a URL that should open in Maps will result in nothing happening.

Here's some example code:

if UIApplication.shared.canOpenURL(URL(string: "http://maps.apple.com/?q=Dresden")!) {
            UIApplication.shared.open(URL(string: "http://maps.apple.com/?q=Dresden")!, completionHandler: nil)
        } else {

If Maps.app is hidden a ✅will be printed and nothing else happens. This has the same results if querying for the "maps://" url scheme or if trying to open Maps via the MKMapItem API call instead of a URL.

Steps to Reproduce:
Sorry, I just threw it all into the description fiel above.	

Expected Results:
Either return false on the call to canOpenURL() (which would be the correct behavior based on the docs) or prompt the user to re"install" Maps.app.

Actual Results:
Silence :(

iOS 10.3.1



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