Bug 59944 - Drag and drop doesn't transfer data through NSItemProviderReading
Summary: Drag and drop doesn't transfer data through NSItemProviderReading
Alias: None
Product: iOS
Classification: Xamarin
Component: XI runtime ()
Version: XI 11.0 (xcode9)
Hardware: PC Windows
: Normal normal
Target Milestone: Xcode9.1
Assignee: Rolf Bjarne Kvinge [MSFT]
Depends on:
Reported: 2017-10-04 09:41 UTC by Ivan Icin
Modified: 2017-10-06 18:07 UTC (History)
4 users (show)

Is this bug a regression?: No
Last known good build:

sample project (374.93 KB, application/x-zip-compressed)
2017-10-04 09:41 UTC, Ivan Icin

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Description Ivan Icin 2017-10-04 09:41:22 UTC
Created attachment 25085 [details]
sample project

As advised in Bug 57735, I am filing a separate issue for this.

I am attaching a sample project to reproduce this. As you can see in the code GetObject method of NSItemProviderReading should transfer NSData to the PerformDrop method of UIDropInteractionDelegate, but it doesn't happen.
Comment 1 Vincent Dondain [MSFT] 2017-10-04 20:13:34 UTC
I could confirm that issue with the following environment: https://gist.github.com/VincentDondain/719f215067c483c4c342c3d31768a286

In `DropItemProvider` I just updated `ReadableTypeIdentifiersForItemProvider` to return `UTType.Image` (so I could drop some photos).

The member variable in indeed null when getting `DropItemProvider` from `LoadObjects`.

Note: I made a quick native test case (well updated an Apple sample) to compare and it worked (https://www.dropbox.com/s/dd5mppkq19l63lh/Bug59944-SwiftRepro.zip?dl=0).
Comment 2 Rolf Bjarne Kvinge [MSFT] 2017-10-06 11:57:25 UTC