When there are multiple Windows, drag and drop no longer works.

[jcampbell05]

When there are multiple windows, CoreDragon does try to loop though them but upon not finding a source on the first window it will return nil, the fix is as simple as making sure to only return a source when looping through the windows if there actually is one, otherwise carry on looping:

- (SPDragSource*)sourceUnderLocation:(CGPoint)locationInWindow
{
    for(UIWindow *window in [UIApplication sharedApplication].windows) {
        UIView *view = [window hitTest:locationInWindow withEvent:nil];
        SPDragSource *source = nil;
        do {
            source = objc_getAssociatedObject(view, kDragSourceKey);
            if (source)
                break;
            view = [view superview];
        } while(view);

// FIX STARTS HERE
        if (source) 
            return source;
    }
    return nil;
}

[jcampbell05]

There appears to be the same thing with drop target as well.

[nevyn]

@jcampbell05 Thank you!! Would you mind providing this fix as a pull request?

[nevyn]

Nm fixed it myself, thanks :)

[jcampbell05]

@nevyn haha, sorry about this. works great going to ship in an app !

[nevyn]

@jcampbell05 yay!! did you ship? which app?