Coreplot on iPhone

I followed Using Core Plot in an iPhone Application to generate a graph. I got some errors though. I originally wanted to comment on the tutorial page but wasn’t allowed to. The errors,

/Users/tilaye/Desktop/apps/CorePlotTest/Classes/CorePlotTestViewController.m:106: error: incompatible type for argument 1 of 'setMajorIntervalLength:'
/Users/tilaye/Desktop/apps/CorePlotTest/Classes/CorePlotTestViewController.m:113: error: request for member 'axisLabelOffset' in something not a structure or union
/Users/tilaye/Desktop/apps/CorePlotTest/Classes/CorePlotTestViewController.m:115: error: incompatible type for argument 1 of 'setMajorIntervalLength:'
/Users/tilaye/Desktop/apps/CorePlotTest/Classes/CorePlotTestViewController.m:122: error: request for member 'axisLabelOffset' in something not a structure or union
/Users/tilaye/Desktop/apps/CorePlotTest/Classes/CorePlotTestViewController.m:125: error: request for member 'bounds' in something not a structure or union
/Users/tilaye/Desktop/apps/CorePlotTest/Classes/CorePlotTestViewController.m:135: error: request for member 'defaultPlotSymbol' in something not a structure or union
/Users/tilaye/Desktop/apps/CorePlotTest/Classes/CorePlotTestViewController.m:138: error: request for member 'bounds' in something not a structure or union
replaced axisLabelOffset with labelOffset,

I did the following to work around the issue,

replaced axisLabelOffset with labelOffset

replaced graph.defaultPlotSpace.bounds with graph.defaultPlotSpace.graph.bounds

replaced [NSDecimalNumber decimalNumberWithString:@"5"] with [[NSDecimalNumber decimalNumberWithString:@"5"] decimalValue]

My final working viewDidLoad method was then,

- (void)viewDidLoad {
  [super viewDidLoad];

  graph = [[CPXYGraph alloc] initWithFrame: self.view.bounds];
  self.view = [[CPLayerHostingView alloc]initWithFrame:[UIScreen mainScreen].bounds];
  CPLayerHostingView *hostingView = (CPLayerHostingView *)self.view;
  hostingView.hostedLayer = graph;
  graph.paddingLeft = 20.0;
  graph.paddingTop = 20.0;
  graph.paddingRight = 20.0;
  graph.paddingBottom = 20.0;

  CPXYPlotSpace *plotSpace = (CPXYPlotSpace *)graph.defaultPlotSpace;
  plotSpace.xRange = [CPPlotRange plotRangeWithLocation:CPDecimalFromFloat(-6)
  length:CPDecimalFromFloat(12)];
  plotSpace.yRange = [CPPlotRange plotRangeWithLocation:CPDecimalFromFloat(-5)
  length:CPDecimalFromFloat(30)];

  CPLineStyle *lineStyle = [CPLineStyle lineStyle];
  lineStyle.lineColor = [CPColor blackColor];
  lineStyle.lineWidth = 2.0f;

  CPXYAxisSet *axisSet = (CPXYAxisSet *)graph.axisSet;
  axisSet.xAxis.majorIntervalLength = [[NSDecimalNumber decimalNumberWithString:@"5"] decimalValue];
  axisSet.xAxis.minorTicksPerInterval = 4;
  axisSet.xAxis.majorTickLineStyle = lineStyle;
  axisSet.xAxis.minorTickLineStyle = lineStyle;
  axisSet.xAxis.axisLineStyle = lineStyle;
  axisSet.xAxis.minorTickLength = 5.0f;
  axisSet.xAxis.majorTickLength = 7.0f;
  axisSet.xAxis.labelOffset = 3.0f;

  axisSet.yAxis.majorIntervalLength = [[NSDecimalNumber decimalNumberWithString:@"5"] decimalValue];
  axisSet.yAxis.minorTicksPerInterval = 4;
  axisSet.yAxis.majorTickLineStyle = lineStyle;
  axisSet.yAxis.minorTickLineStyle = lineStyle;
  axisSet.yAxis.axisLineStyle = lineStyle;
  axisSet.yAxis.minorTickLength = 5.0f;
  axisSet.yAxis.majorTickLength = 7.0f;
  axisSet.yAxis.labelOffset = 3.0f;

  CPScatterPlot *xSquaredPlot = [[[CPScatterPlot alloc]
  initWithFrame:graph.defaultPlotSpace.graph.bounds] autorelease];
  xSquaredPlot.identifier = @"X Squared Plot";
  xSquaredPlot.dataLineStyle.lineWidth = 1.0f;
  xSquaredPlot.dataLineStyle.lineColor = [CPColor redColor];
  xSquaredPlot.dataSource = self;
  [graph addPlot:xSquaredPlot];

  CPPlotSymbol *greenCirclePlotSymbol = [CPPlotSymbol ellipsePlotSymbol];
  greenCirclePlotSymbol.fill = [CPFill fillWithColor:[CPColor greenColor]];
  greenCirclePlotSymbol.size = CGSizeMake(2.0, 2.0);

  [xSquaredPlot setPlotSymbol:greenCirclePlotSymbol];

  CPScatterPlot *xInversePlot = [[[CPScatterPlot alloc]
  initWithFrame:graph.defaultPlotSpace.graph.bounds] autorelease];
  xInversePlot.identifier = @"X Inverse Plot";
  xInversePlot.dataLineStyle.lineWidth = 1.0f;
  xInversePlot.dataLineStyle.lineColor = [CPColor blueColor];
  xInversePlot.dataSource = self;
  [graph addPlot:xInversePlot];
}

I also got

/Users/tilaye/Desktop/apps/TestApp/Classes/TaggedVideoGraphViewController.m:135: warning: method definition for '-numberOfRecordsForPlot:' not found

and changed my function signature from

-(NSUInteger)numberOfRecords {

to

-(NSUInteger)numberOfRecordsForPlot:(CPPlot *)plot {

Posted in: Objective C, iPhone

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