draggingStartedBlock didn't work when UIView dragged fast enough

[jeffssss]

In Demo, FPViewController.m , I use draggingStartedBlock

- (IBAction)actionSwitch:(UISwitch*)sender {
    [self.draggableViews enumerateObjectsUsingBlock:^(UIView* obj, NSUInteger idx, BOOL *stop) {
        [obj setDraggable:sender.isOn];
        obj.draggingStartedBlock= ^(){
            NSLog(@"dragging!~!~!~!");
        };
    }];
}

when I drag UIView slowly, it works well, but when I drag UIView fast enough, draggingStartedBlock doesn't work.

I think the problem is , when - (void)handlePan:(UIPanGestureRecognizer*)sender is called, sender.state is alreay 'UIGestureRecognizerStateChanged' .
I'm not sure and I wonder whether there are some good solutions.

THANK YOU.

[andreamazz]

Maybe when scrolling too fast you are skipping the handle?
See https://github.com/andreamazz/UIView-draggable/blob/master/Source/UIView%2Bdraggable.m#L98-L102