ios - How can I create a piechart that looks like a pie using CorePlot? -

the graph on left 1 coreplot gallery demo, 1 on right 1 created code below. think i missing in order make actual circular pie:

-(void)configurechart {     // 1 - reference graph     piechartgraph = [[cptxygraph alloc] initwithframe:self.piechartgraphhostview.bounds];     self.piechartgraphhostview.hostedgraph = piechartgraph;      // 2 - create chart     piechart = [[cptpiechart alloc] init];     piechart.datasource = self;     piechart.delegate = self; //    piechart.pieradius = (self.piechartgraphhostview.bounds.size.height * 0.7) / 2;     piechart.pieradius = (self.piechartgraphhostview.bounds.size.height * 0.7) / 2;      piechart.identifier = piechartgraph.title;     piechart.startangle = cptfloat(m_pi_4);     piechart.slicedirection = cptpiedirectionclockwise;     piechart.borderlinestyle = [cptlinestyle linestyle];     // 3 - create gradient      cptgradient *overlaygradient = [[cptgradient alloc] init];     overlaygradient.gradienttype = cptgradienttyperadial;     overlaygradient = [overlaygradient addcolorstop:[[cptcolor blackcolor] colorwithalphacomponent:0.0] atposition:0.9];     overlaygradient = [overlaygradient addcolorstop:[[cptcolor blackcolor] colorwithalphacomponent:0.4] atposition:1.0];     piechart.overlayfill = [cptfill fillwithgradient:overlaygradient];     // 4 - add chart graph      [piechartgraph addplot:piechart];      piechart.datasource = self;      self.dataforchart = [@[@20.0, @30.0, @60.0] mutablecopy];       //self.dataforchart = [@[@20.0, @30.0, @60.0]mutablecopy]; } 

i tried copy code demo gallery (class called coreplot coreplot example project here).

what doing wrong? why graph square , not circle?

try edit radius of chart. makes circle. obtain circle square view usualy like:

squareview.radius = view.frame.size.width/2; 

you can try on piechart:

piechart.pieradius = piechart.frame.size.width/2; 

and way setting 2 times piechart datasource