calimarkus/JDDroppableView

DroppableView

Easy Drag & Drop - even within scrollviews! A base class to make any view draggable. Automatic drag target recognition.

A DroppableView represents a single draggable View. Use it as a base class for any view that should be draggable. You can even use it to drag something out of a scrollview, as you can see in the example project. The white cards can be dragged out of the scrollView onto the gray & red circles. Try it!

You can define views as drop targets like those gray & red circles. You will then be informed, if a dragged view hits those targets, leaves them again or is released / dropped over a drop target.

Usage

Subclass any view from JDDroppableView and you are ready to go. If you want to specify certain views as drop-targets, you can use any of the following APIs to do so:

    - (id)initWithDropTarget:(UIView *)target;
    - (void)addDropTarget:(UIView *)target;
    - (void)removeDropTarget:(UIView *)target;
    - (void)replaceDropTargets:(NSArray *)targets;

• target is a view (outside of the scrollview), to where the element should be draggable

If you use a DroppableView within a UIScrollView, you need to set canCancelContentTouches = NO; on the scrollView.