Databases
StackOverflow2013
Postsdbo
POCABasicAnimation - Animating between two angles
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POCABasicAnimation - Animating between two angles
    primarykey
    data
    text
    <p>I'm attempting to create an animated <code>CALayer</code> that uses a <code>CABasicAnimation</code> in order to animate an object that rotates at discrete intervals between two angles. Note the word discrete: I'm not trying to create a continuous animation between two points, but rather I want to calculate fixed increments between each angle in order to create a discrete movement feel.</p> <p>Here's a diagram:</p> <p><img src="https://i.stack.imgur.com/utKAr.png" alt="enter image description here"></p> <p>I've looked into setting the <code>byValue</code> attribute of the <code>CABasicAnimation</code>, but I can't seem to get it to work since you can't use <code>fromValue</code>, <code>ToValue</code>, and <code>byValue</code> in one animation. <code>fromValue</code> is always from zero, so I guess that could be dropped, but it still never animates correctly when using the current <code>endAngle</code> as the <code>toValue</code> and a <code>byValue</code> of <code>0.1</code> (arbitrarily chosen but should work for testing). Any ideas on how to implement this? Here's code I'm using:</p> <pre><code>anim = [CABasicAnimation animationWithKeyPath:@"currentEndAngle"]; anim.duration = 0.5f; anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]; anim.toValue = [NSNumber numberWithFloat:self.endAngle]; anim.byValue = [NSNumber numberWithFloat:0.1f]; anim.repeatCount = HUGE_VALF; [anim setDelegate:self]; [self addAnimation:anim forKey:@"animKey"]; </code></pre> <p>Thanks!</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USJ Kagney
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. CODo you want it to move `0.1f` each step? `byValue` won't work as it has different meaning: if you set `toValue` and `byValue`, the animation will go from `toValue - byValue` to `toValue`. I guess you need a timer here...
      singulars
      1. POCABasicAnimation - Animating between two angles
      1. USKhanh Nguyen
    2. COCheck out the `CABasicAnimation` documentation
      singulars
      1. POCABasicAnimation - Animating between two angles
      1. USKhanh Nguyen
    3. COYes, I want it to move 0.1 radians each step. Are you saying CABasicAnimation won't cut it for this?
      singulars
      1. POCABasicAnimation - Animating between two angles
      1. USJ Kagney
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload