Unable to have two CorePlot graphs show simultaneously

Question

I'm having an issue having two different CorePlot graphs show up in the same view. I've set up two hosting views in my view and all the referencing outlets are connected correctly. Only one of the graphs shows up correctly. Adding a quick NSLog to the numberForPlot method shows that only the first graph is being populated (graph and graphView) and not the second (trend and trendView). Here's the code:

- (void) graphSetup {
    CPTTheme *theme = [CPTTheme themeNamed:kCPTPlainWhiteTheme];

    graph = (CPTXYGraph *)[theme newGraph]; 

    graphView.hostedGraph = graph;
    graphView.allowPinchScaling = YES;

    graph.paddingLeft = -5;
    graph.paddingTop = 0;
    graph.paddingRight = -5;
    graph.paddingBottom = -5;
    graph.fill = nil;
    graph.plotAreaFrame.fill = nil;
    int a = 0;
    for (int i = 0; i < [romAveragesArray count]; i++) {
        if ([romAveragesArray objectAtIndex:i] != NULL)
            a++;
    }

    int localMax = 0;
    int localMin = 0;

    for (int a = 0; a < [romAveragesArray count]; a++) {
        if ([[romAveragesArray objectAtIndex:a] getValue] > localMax)
            localMax = [[romAveragesArray objectAtIndex:a] getValue];
        else if ([[romAveragesArray objectAtIndex:a] getValue] < localMin)
            localMin = [[romAveragesArray objectAtIndex:a] getValue];
    }

    for (int a = 0; a < [obaAveragesArray count]; a++) {
        if ([[obaAveragesArray objectAtIndex:a] getValue] > localMax)
            localMax = [[obaAveragesArray objectAtIndex:a] getValue];
        else if ([[obaAveragesArray objectAtIndex:a] getValue] < localMin)
            localMin = [[obaAveragesArray objectAtIndex:a] getValue];

    }


    CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace;
    plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInt(0)
                                                    length:CPTDecimalFromInt(145)];
    NSLog(@"%d",a);
    plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInt(0)
                                                    length:CPTDecimalFromInt(localMax+15)];




    CPTXYAxisSet *axisSet = (CPTXYAxisSet *)graph.axisSet;

    CPTXYAxis *x = axisSet.xAxis;
    x.majorIntervalLength = CPTDecimalFromFloat(10);
    x.minorTicksPerInterval = 2;
    x.borderWidth = 0;
    x.labelExclusionRanges = [NSArray arrayWithObjects:
                              [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-100) 
                                                           length:CPTDecimalFromFloat(300)], 
                              nil];;

    CPTXYAxis *y = axisSet.yAxis;
    y.majorIntervalLength = CPTDecimalFromFloat(10);
    y.minorTicksPerInterval = 1;
    y.labelExclusionRanges = [NSArray arrayWithObjects:
                              [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-100) 
                                                           length:CPTDecimalFromFloat(300)], 
                              nil];





    CPTScatterPlot *dataSourceLinePlot = [[CPTScatterPlot alloc] init];
    dataSourceLinePlot.identifier = @"Obama";
    dataSourceLinePlot.dataSource = self;
    CPTMutableLineStyle *style = [CPTMutableLineStyle lineStyle];
    style.lineColor = [CPTColor colorWithComponentRed:0.3215686274509804 green:0.6078431372549019 blue:1.0 alpha:1.0];
    dataSourceLinePlot.dataLineStyle = style;
    [graph addPlot:dataSourceLinePlot];


    CPTScatterPlot *dataSourceLinePlot1 = [[CPTScatterPlot alloc] init];
    dataSourceLinePlot1.identifier = @"Rom";
    dataSourceLinePlot1.dataSource = self;
    CPTMutableLineStyle *style1 = [CPTMutableLineStyle lineStyle];
    style1.lineColor = [CPTColor colorWithComponentRed:0.9803921568627451 green:0.47058823529411764 blue:0.47058823529411764 alpha:1.0];
    dataSourceLinePlot1.dataLineStyle = style1;
    [graph addPlot:dataSourceLinePlot1];
     [self trendSetup];

    [self postStats];

}


- (void) trendSetup {
    CPTTheme *theme1 = [CPTTheme themeNamed:kCPTPlainWhiteTheme];

    trend = (CPTXYGraph *) [theme1 newGraph];
    trendView.allowPinchScaling = YES;
    trendView.hostedGraph = trend;

    trend.paddingLeft = -5;
    trend.paddingRight = -5;
    trend.paddingTop = 0;
    trend.paddingBottom = -5;
    trend.fill =  nil;
    trend.plotAreaFrame.fill = nil;
    int obaMax, localMax;
    for (int i = 0; i < [obaArray count]; i++)
        obaMax += [[obaArray objectAtIndex:i] getValue];

    int romMax;
    for (int i = 0; i < [romArray count]; i++)
        romMax += [[romArray objectAtIndex:i] getValue];

    if (romMax > obaMax)
        localMax = romMax;
    else
        localMax = obaMax;

    CPTXYPlotSpace *trendSpace = (CPTXYPlotSpace *)trend.defaultPlotSpace;
    trendSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInt(0) length:CPTDecimalFromInt(504)];
    trendSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInt(0) length:CPTDecimalFromInt(localMax)];

    CPTXYAxisSet *trendSet = (CPTXYAxisSet *)trend.axisSet;

    CPTXYAxis *trendX = trendSet.xAxis;
    trendX.majorIntervalLength = CPTDecimalFromInt(10);
    trendX.minorTicksPerInterval = 2;
    trendX.borderWidth  = 0;
    trendX.labelExclusionRanges = [NSArray arrayWithObjects:[CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-100) length:CPTDecimalFromFloat(300)], nil];;

    CPTXYAxis *trendY = trendSet.xAxis;
    trendY.majorIntervalLength = CPTDecimalFromInt(10);
    trendY.minorTicksPerInterval = 2;
    trendY.borderWidth  = 0;
    trendY.labelExclusionRanges = [NSArray arrayWithObjects:[CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-100) length:CPTDecimalFromFloat(300)], nil];;

    CPTScatterPlot *trendSourceLinePlot = [[CPTScatterPlot alloc] init];
    trendSourceLinePlot.identifier = @"Obama Trend";
    trendSourceLinePlot.dataSource = self;
    CPTMutableLineStyle *style3 = [CPTMutableLineStyle lineStyle];
    style3.lineColor = [CPTColor colorWithComponentRed:0.3215686274509804 green:0.6078431372549019 blue:1.0 alpha:1.0];
    trendSourceLinePlot.dataLineStyle = style3;
    [trend addPlot:trendSourceLinePlot];


    CPTScatterPlot *trendSourceLinePlot1 = [[CPTScatterPlot alloc] init];
    trendSourceLinePlot1.identifier = @"Rom Trend";
    trendSourceLinePlot1.dataSource = self;
    CPTMutableLineStyle *style4 = [CPTMutableLineStyle lineStyle];
    style4.lineColor = [CPTColor colorWithComponentRed:0.9803921568627451 green:0.47058823529411764 blue:0.47058823529411764 alpha:1.0];
    trendSourceLinePlot1.dataLineStyle = style4;
    [trend addPlot:trendSourceLinePlot1];

}

@CStreel Yes. I think the app is getting stuck in an infinite loop in the setContentsScale method of CorePlot's CPTLayer class. — Peter Kazazes

Peter Kazazes Peter Kazazes · Accepted Answer · 2012-05-18T19:59:40

The graph's Y range was too long. I removed sections from the tick marks section and now it updates promptly.

Unable to have two CorePlot graphs show simultaneously

2 Answers