What if I want to animate the LineChartView progression?

[kidsid49]

I wants to animate the LineChartView progression.
Eg. The stroke end of CAShapeLayer that is involved.

I did it by doing it in drawRect of JBLineChartView.m

    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
    animation.fromValue = @0;
    animation.toValue = @1;
    animation.duration = 2.0;
    animation.delegate=self;
    [shapeLayer addAnimation:animation forKey:@"JBLineStroke"];

Is it ok do animation in DrawRect?
And How to synch it with dot animation if dots does scales up animation only when line reaches to that particular point?

[terryworona]

Hey @kidsid49, this particular feature has been requested quite a few times.

Unfortunately, we don't plan on supported it going forward.

I can't speak to how you would animate it, but core animation is a good start.

I wouldn't put it into drawRect, but instead tie it into the setState flow, passing the state and callback all the way down to the linesView subview (where the animation can take place).

[sbauch]

I achieved this by just putting a "cover" UIView on top of the chart and animating its frame in order to reveal the line beneath it. Hacky but works!

[terryworona]

@kidsid49 you should animate in the setState: function - it definitely shouldn't be done in drawRect since that can (and will) be called any number of times.