uikit-dynamics

I know that external change to center , bounds and transform will be ignored after UIDynamicItem s init. But I need to manually change the transform of UIView that in UIDynamicAnimator system. Every time I change the transform , it will be covered at once. So any idea? Thanks. Any time you change one of the animated properties, you need to call [dynamicAnimator updateItemUsingCurrentState:item] to let the dynamic animator know you did it. It'll update it's internal representation to match the current state. EDIT: I see from your code below that you're trying to modify the scale.

I would like to drag one UIView, and have it move the position of other views attached to it as if they were all attached via string. The starting state would be a bunch of UIViews clumped together. If you pull one out, the item it's attached to will begin to move once the minimum distance is met between it and the view being dragged. I was thinking that the best way to accomplish this would be using UIDynamicItemBehavior considering I need it to snap back into place and have weight applied to it. I'm not quite sure how to accomplish this without doing ridiculous code otherwise. The code I do

My table view cells contain a circle in an UIView , indicating a value. I want to add the UIKit Dynamics attachment behaviour to that circle in order to for it to lag a bit when scrolling. I don't want to attach the individual cells to each other but only the circle view to the UITableViewCell . The rest of the cell should scroll as usual. Problem: The UITableViewCell has its origin always at (0, 0) . How can I add the circle to a view that actually does move when scrolling? I finally got it to work. The UITableView moves the coordinate system of every cell and of all views contained within

I'm pretty new to auto layout and I'm confused about how to animate views. I read a lot, and I know you must hold to the constraints, edit it, and wrap the layoutIfNeeded in an UIView animation block. But when it comes to do it, I'm a little lost. I'd love if someone could explain me how this animation is done for example. I think it probably uses a UIPanGestureRecognizer to change the constant of the leading space to container constraint, but it probably uses UIDynamics (for the bounce effect at the right ?). Well, similar behavior could be achieved with UIPanGestureRecognizer + [UIView