uikit-dynamics

I have a small UIView that bounces in a box. I am adding an Instantaneous mode. push. In fact I am adding very many pushes -- 5 or more Hz. Mystery: (1) Do I have to removeBehavior???? if so .. when ?!? "after" an "instant" ? (2) Is it that UIPushBehaviorModeInstantaneous is a special case, and you do not have to (or cannot) remove those?? (3) When you addBehavior: does that .. retain?! the UIPushBehavior? Or?? WTF?! (4) I couldn't seem to find these aspects documented anywhere! -(void)pushMeRight:(CGFloat)mag { if ( self.bounceAnimator == nil ) return; NSLog(@"...........push me right %.2f",

There are many situations where you need to "shake" a UIView. (For example, "draw child user's attention to a control", "connection is slow", "user enters bad input," and so on.) Would it be possible to do this using UIKit Dynamics? So you'd have to .. take the view, say at 0,0 add a spring concept give it a nudge, say to the "left" it should swing back and fore on the spring, ultimately settling again to 0,0 Is this possible? I couldn't find an example in the Apple demos. Cheers Please note that as Niels astutely explains below, a spring is not necessarily the "physics feel" you want for some

I have gone through the documentation, and I am embarrassed to say I am confused. The Scenario : I have a UIView , that acts like a container for 3 UIButtons . This container is initially of bounds {0, 0, 35, 35} , with each button inside with the same co-ordinates (with alpha 0). On a specific action by the user, the container changes bounds to {0, 0, 100, 35} , and the button are animated to x-origin 5, 35, and 65, respectively, with alpha 1, such that they are spread out inside the resized container. I refer to this as the expanded state of the container. The same action by the user,

I'm trying to figure out implement UIKit Dynamics that are similar to those in Jelly's app (specifically swiping down to drag view off-screen). See the animation: http://vimeo.com/83478484 (@1:17) I understand how UIKit Dynamics work, but don't have a great physics background and therefore am having trouble combing the different behaviors to get the desired result! This sort of dragging can be accomplished with an UIAttachmentBehavior where you create the attachment behavior upon UIGestureRecognizerStateBegan , change the anchor upon UIGestureRecognizerStateChanged . This achieves the dragging

So I'm developing a game using SpriteKit. And to make the game more interesting I decided to use UIDynamicAnimator to add some physics to the UIKit elements within my game. Everything works great except there is one major problem. The moment I alloc/init a UIDynamicAnimator like so: animator = [[UIDynamicAnimator alloc] initWithReferenceView:self.view]; The physics bodies in my game get completely offset. Even if I don't specify a reference view the physics still get offset. What's strange is that i'm creating the UIDynamicAnimator in a completely separate ViewController so it's not like it's

When you are in a conversation within the Messages app in iOS 7, if you scroll up or down you will notice that the bubbles and more so the text saying when the messages were sent, will bounce into place. I am trying to replicate this in my own table view, but am not finding a way to do it. I assume it is using UIDynamics, but I am not sure how to tie that in with the scrolling and the content bouncing. Any help would be appreciated If you want to replicate that effect yourself, you need UIKit Dynamics. I was interested in that effect myself and it was explained at WWDC this year. Take a look