Les nombres sur l'axe ne s'affichent pas lors de l'utilisation de Core Plot

Question

Je réalise un graphique pour mon application iOS, en utilisant la fonction Bibliothèque de base de Plot

Cependant, mes axes n'affichent aucun chiffre ni aucune étiquette :

Voici mon viewDidLoad méthode :

- (void)viewDidLoad
{
    [super viewDidLoad];
    //[self generateExponentialDataSamples];
    [self generateGraphDataSamples];

    CPTGraphHostingView *hostingView = [[CPTGraphHostingView alloc]initWithFrame:self.view.bounds];
    [self.view addSubview:hostingView];

    // Create graph from theme
    CPTXYGraph *graph = [[CPTXYGraph alloc] initWithFrame:self.view.bounds];
    CPTTheme *theme = [CPTTheme themeNamed:kCPTPlainWhiteTheme];
    [graph applyTheme:theme];
    graph.paddingLeft = 30.0;
    graph.paddingTop = 30.0;
    graph.paddingRight = 30.0;
    graph.paddingBottom = 30.0;              

    hostingView.hostedGraph = graph;

    // Title
    CPTMutableTextStyle *textStyle = [CPTMutableTextStyle textStyle];
    textStyle.color = [CPTColor greenColor];
    textStyle.fontSize = 18.0f;
    textStyle.fontName = @"Helvetica";
    graph.title = @"My Progress";
    graph.titleTextStyle = textStyle;
    graph.titleDisplacement = CGPointMake(0.0f, -20.0f);

    double xAxisStart = 0.0;
    double xAxisLength = MAX_X_VALUE;
    double yAxisStart = 0.0;
    //double yAxisLength = [[samples valueForKeyPath:@"@max.Y_VAL"]doubleValue];
    double yAxisLength = 10;

    CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace;
    plotSpace.xRange = [CPTPlotRange  plotRangeWithLocation:CPTDecimalFromDouble(xAxisStart) length:CPTDecimalFromDouble(xAxisLength)];
    plotSpace.yRange = [CPTPlotRange  plotRangeWithLocation:CPTDecimalFromDouble(yAxisStart) length:CPTDecimalFromDouble(yAxisLength)];

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

    CPTXYAxis *x = axisSet.xAxis;
    x.minorTicksPerInterval = 0; //the number of minor ticks between every major tick
    x.orthogonalCoordinateDecimal = CPTDecimalFromString(@"0"); // The axis should begin in the origin
    x.labelingPolicy = CPTAxisLabelingPolicyAutomatic;
    x.title = @"x-axis";
    x.titleTextStyle = textStyle;

    CPTXYAxis *y = axisSet.yAxis;
    y.minorTicksPerInterval = 0;
    y.orthogonalCoordinateDecimal = CPTDecimalFromString(@"0");
    y.labelingPolicy = CPTAxisLabelingPolicyAutomatic;
    y.title = @"y-axis";
    y.titleTextStyle = textStyle;

    CPTScatterPlot *dataSourceLinePlot = [[CPTScatterPlot alloc]init];
    dataSourceLinePlot.dataSource = self;

    // Add line style
    CPTMutableLineStyle *lineStyle = [CPTMutableLineStyle lineStyle];
    lineStyle.lineWidth = 1.0f;
    lineStyle.lineColor = [CPTColor greenColor];
    dataSourceLinePlot.dataLineStyle = lineStyle;

    // create the fill area
    dataSourceLinePlot.areaFill = [CPTFill fillWithColor:[[CPTColor greenColor] colorWithAlphaComponent:0.2f]];
    dataSourceLinePlot.areaBaseValue = CPTDecimalFromString(@"0");

    [graph addPlot:dataSourceLinePlot];
}

C'est un peu le bazar, mais j'apprécierais vraiment un peu d'aide.

Answer 1

Définissez la direction des tics pour chaque axe :

x.tickDirection = CPTSignPositive;
y.tickDirection = CPTSignPositive;