position « animation « iPhone iPad Media Q&A

1. Switching CABasicAnimation on the position property mid animation causes a flicker    stackoverflow.com

I have some code that uses CALayers to have bubbles flowing bottom to top. If the user touches the screen I have some code that replaces the currently running animation with ...

2. Rotation always start from original position    stackoverflow.com

I am trying to implement a wheel type functionality. I calculate the center point of the view and find the angle created on moving in touchesMoved: method. For the first move ...

3. how find position of CAlayer during animation?    stackoverflow.com

I am implementing game application.In which i am using layer for animation. CGMutablePathRef path = CGPathCreateMutable(); CGPathMoveToPoint(path, NULL, previousValuex, previousValue); CGPathAddLineToPoint(path, NULL, valuex, value); ...

4. presentationLayer position property yielding bad values on iPad, no problem with iPhone    stackoverflow.com

I have a game with several small objects animated using CAKeyframeAnimation. Objects animate perfectly for BOTH iPhone and iPad. However, the value of the position property of the animated ...

5. What causes this error? "CALayer position contains NaN: [240 nan]"    stackoverflow.com

I've seen this happen whenever i rotate a screen that has a UITableView on it. I've found out that it happens inbetween the willRotate and didRotate method calls in UIViewController ...

6. CALayer sublayers starting from original position after rotational (x & y axis) animations    stackoverflow.com

I have been struggling with what seems to be a simple Core Animation issue. I have added four CALayer's to a UIView.layer. Each of the sublayers just contains a small image. ...

7. How to get position during animation which uses CALayer and CGPath in iPhone    stackoverflow.com

 hI,

 I am workng on animation using CALayer and CAPath.

 Here I am animating an Image from top to bottom of screen.I gave starting and ending position for
 the animation.Now, ...

8. Is there an issue with updating a CALayer position while the layer is paused?    stackoverflow.com

Is there an issue with reading the presentation position while it's paused? I'm trying to pause and resume a CALayer. Once the CALayer is paused, I want to update the layer's position ...

9. Core Animation, unexpected animated position and hitTest values    stackoverflow.com

When I use :

CALayer *hitLayer = 
[[self.view.window.layer presentationLayer] hitTest:pointOfTouch];