ios - Why is this not animating? -


i implemented coreplot in xcode project. have pie chart i'm trying animate. here code:

- (void)configurechart {     cptgraph *graph = self.hostview.hostedgraph;      cptpiechart *piechart = [[cptpiechart alloc] init];     piechart.datasource = self;     piechart.delegate = self;     piechart.pieradius = (self.hostview.bounds.size.height * 0.7) / 2;     piechart.startangle = m_pi_4;     piechart.slicedirection = cptpiedirectionclockwise;      [graph addplot:piechart];

this tried:

    cabasicanimation *rotation = [cabasicanimation animationwithkeypath:@"transform.rotation"];     rotation.removedoncompletion = yes;     rotation.fromvalue = [nsnumber numberwithfloat:0.0f];     rotation.duration = 1.0f;     rotation.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseineaseout];     rotation.delegate = self;     [piechart addanimation:rotation forkey:@"rotation"]; }

when run app, doesn't animate. doing wrong, , how can fix it?

update 1

i tried following:

[cptanimation animate:piechart property:@"startangle" from:piechart.startangle to:piechart.endangle duration:1.0];

that didn't have desired effect. chart show second, disappear.

update 2

i'm trying effect: http://jsfiddle.net/ozgr1wfx/

i'm not sure i'm doing wrong.

don't animate layer transform. animate start angle instead. otherwise, labels , other annotations rotate plot.

from plot gallery example app:

[cptanimation animate:pieplot              property:@"startangle"                  from:cptfloat(m_pi_2)                    to:cptfloat(m_pi_4)              duration:0.25];

as noted in comments, angles given in radians (pi radians = 180 degrees).


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