Databases
StackOverflow2013
Postsdbo
POAnimated CAShapeLayer Pie
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAnimated CAShapeLayer Pie
    primarykey
    data
    text
    <p>I am trying to create a simple and animated pie chart using <code>CAShapeLayer</code>. I want it to animate from 0 to a provided percentage.</p> <p>To create the shape layer I use:</p> <pre><code>CGMutablePathRef piePath = CGPathCreateMutable(); CGPathMoveToPoint(piePath, NULL, self.frame.size.width/2, self.frame.size.height/2); CGPathAddLineToPoint(piePath, NULL, self.frame.size.width/2, 0); CGPathAddArc(piePath, NULL, self.frame.size.width/2, self.frame.size.height/2, radius, DEGREES_TO_RADIANS(-90), DEGREES_TO_RADIANS(-90), 0); CGPathAddLineToPoint(piePath, NULL, self.frame.size.width/2 + radius * cos(DEGREES_TO_RADIANS(-90)), self.frame.size.height/2 + radius * sin(DEGREES_TO_RADIANS(-90))); pie = [CAShapeLayer layer]; pie.fillColor = [UIColor redColor].CGColor; pie.path = piePath; [self.layer addSublayer:pie]; </code></pre> <p>Then to animate I use:</p> <pre><code>CGMutablePathRef newPiePath = CGPathCreateMutable(); CGPathAddLineToPoint(newPiePath, NULL, self.frame.size.width/2, 0); CGPathMoveToPoint(newPiePath, NULL, self.frame.size.width/2, self.frame.size.height/2); CGPathAddArc(newPiePath, NULL, self.frame.size.width/2, self.frame.size.height/2, radius, DEGREES_TO_RADIANS(-90), DEGREES_TO_RADIANS(125), 0); CGPathAddLineToPoint(newPiePath, NULL, self.frame.size.width/2 + radius * cos(DEGREES_TO_RADIANS(125)), self.frame.size.height/2 + radius * sin(DEGREES_TO_RADIANS(125))); CABasicAnimation *pieAnimation = [CABasicAnimation animationWithKeyPath:@"path"]; pieAnimation.duration = 1.0; pieAnimation.removedOnCompletion = NO; pieAnimation.fillMode = kCAFillModeForwards; pieAnimation.fromValue = pie.path; pieAnimation.toValue = newPiePath; [pie addAnimation:pieAnimation forKey:@"animatePath"]; </code></pre> <p>Obviously, this is animating in a really odd way. The shape just kind of grows into its final state. Is there an easy way to make this animation follow the direction of the circle? Or is that a limitation of <code>CAShapeLayer</code> animations?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USMike A
    plurals
    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. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POAnimated CAShapeLayer Pie
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POAnimated CAShapeLayer Pie
      1. USJerry Tian
      1. VTFavorite
    3. VO
      singulars
      1. POAnimated CAShapeLayer Pie
      1. USmarcio
      1. VTFavorite
    1. CONot an answer to your question, but you might be interested in this: http://code.google.com/p/core-plot/
      singulars
      1. POAnimated CAShapeLayer Pie
      1. USChris Devereux
 

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