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

Question

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 usi

Answer 1

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"];