CODEWITHSUNDEEP
iphoneioscore-plot
KingofHeaven
KingofHeaven

Reputation: 1205

How do I animate the appearance of a bar chart in Core Plot?

When first displaying a bar chart using Core Plot, I'd like the bars to grow upward until they reach their correct heights.

How would you create such an animation using this framework?

Upvotes: 6

Views: 5779

Answers (5)

vishnu
vishnu

Reputation: 715

Add opacity animation like this...

CABasicAnimation *fadeInAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeInAnimation.duration = 1.0f;
fadeInAnimation.removedOnCompletion = NO;
fadeInAnimation.fillMode = kCAFillModeForwards;
fadeInAnimation.toValue = [NSNumber numberWithFloat:1.0];
[xSquaredPlot addAnimation:fadeInAnimation forKey:@"animateOpacity"];

Upvotes: 0

mayuur
mayuur

Reputation: 4746

Thanks Michele for your great answer.

I have uploaded an example from her answer to Github for those who would want to download the demo and start working right away!

https://github.com/mayuur/CoreplotAnimation

Enjoy Coding!!!

Upvotes: 2

jqgsninimo
jqgsninimo

Reputation: 7038

Add animation for your CPTBarPlot as follows:

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform"];
[animation setDuration:1];
CATransform3D transform = CATransform3DMakeScale(1, 0.0001, 1);
// offsetY=[PlotDisplayAreaUnderXAxisHeight]-[PlotDisplayAreaHeight]/2
transform = CATransform3DConcat(transform, CATransform3DMakeTranslation(0, offsetY, 0));
animation.fromValue = [NSValue valueWithCATransform3D:transform];
animation.toValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
[barPlot addAnimation:animation forKey:@"barGrowth"];

Upvotes: 3

Vincent Guerci
Vincent Guerci

Reputation: 14419

This is very similar to: How to animate the pie charts developed using core-plot library?

Upvotes: 1

michele
michele

Reputation: 111

This is what I did:

  1. In my viewDidLoad controller's method I created the CPTXYGraph:

    graph = [[CPTXYGraph alloc] initWithFrame:self.view.bounds];

  2. I added animation to the empty graph:

    CAKeyframeAnimation *scale = [CAKeyframeAnimation animationWithKeyPath:@"transform"];

  3. Then in animationDidStop delegate's method I added the plot data and animation to the graph:

    CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"transform.scale.y"];
[anim setDuration:2.0f];

anim.toValue = [NSNumber numberWithFloat:1.0f];
anim.fromValue = [NSNumber numberWithFloat:0.0f];
anim.removedOnCompletion = NO;
anim.delegate = self;
anim.fillMode = kCAFillModeForwards;

gPlot.anchorPoint = CGPointMake(0.0, 0.0);

[gPlot addAnimation:anim forKey:@"grow"];

[graph addPlot:gPlot ];// IMPORTANT here I added the plot data to the graph :) .

Upvotes: 11

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