我的图表中有多个y轴，我想为每个y轴显示不同的图表比例。我的图表显示了2 y轴，但第二个y轴没有显示其上的比例。
我在每个轴上添加了两个不同的绘图空间。它正在绘制数据，但没有显示第二个y轴的比例。
//plot configuration
-(void)configurePlots {
CPTColor *your_color = [CPTColor colorWithComponentRed:126 green:230 blue:255 alpha:0];
// 1 - Get graph and plot space
CPTGraph *graph = self.hostView.hostedGraph;
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;
CPTXYPlotSpace *plotSpace2 =[[CPTXYPlotSpace alloc] init];
graph.plotAreaFrame.fill = [CPTFill fillWithColor:your_color];
// 2 - Create the three plots
CPTScatterPlot *aaplPlot = [[CPTScatterPlot alloc] init];
aaplPlot.dataSource = self;
aaplPlot.identifier = CPDTickerSymbolAAPL;
CPTColor *aaplColor = [CPTColor redColor];
[graph addPlot:aaplPlot toPlotSpace:plotSpace];
[plotSpace scaleToFitPlots:[NSArray arrayWithObjects:aaplPlot, nil]];
CPTMutablePlotRange *xRange = [plotSpace.xRange mutableCopy];
[xRange expandRangeByFactor:CPTDecimalFromCGFloat(1.1f)];
plotSpace.xRange = xRange;
CPTMutablePlotRange *yRange = [plotSpace.yRange mutableCopy];
[yRange expandRangeByFactor:CPTDecimalFromCGFloat(1.2f)];
plotSpace.yRange = yRange;
// 4 - Create styles and symbols
CPTMutableLineStyle *aaplLineStyle = [aaplPlot.dataLineStyle mutableCopy];
aaplLineStyle.lineWidth = 0;
aaplLineStyle.lineColor = aaplColor;
aaplPlot.dataLineStyle = aaplLineStyle;
CPTMutableLineStyle *aaplSymbolLineStyle = [CPTMutableLineStyle lineStyle];
aaplSymbolLineStyle.lineColor = aaplColor;
CPTPlotSymbol *aaplSymbol = [CPTPlotSymbol ellipsePlotSymbol];
aaplSymbol.fill = [CPTFill fillWithColor:aaplColor];
aaplSymbol.lineStyle = aaplSymbolLineStyle;
aaplSymbol.size = CGSizeMake(3.0f, 3.0f);
aaplPlot.plotSymbol = aaplSymbol;
CPTScatterPlot *googPlot = [[CPTScatterPlot alloc] init];
googPlot.dataSource = self;
googPlot.identifier = CPDTickerSymbolGOOG;
CPTColor *googColor = [CPTColor greenColor];
[graph addPlotSpace:plotSpace2];
[graph addPlot:googPlot toPlotSpace:plotSpace2];
[plotSpace2 scaleToFitPlots:[NSArray arrayWithObjects:googPlot, nil]];
[xRange expandRangeByFactor:CPTDecimalFromCGFloat(1.1f)];
plotSpace2.xRange = plotSpace.xRange;
CPTMutablePlotRange *y2Range = [plotSpace2.yRange mutableCopy];
[yRange expandRangeByFactor:CPTDecimalFromCGFloat(1.2f)];
plotSpace2.yRange = y2Range;
CPTMutableLineStyle *googLineStyle = [googPlot.dataLineStyle mutableCopy];
googLineStyle.lineWidth = 0;
googLineStyle.lineColor = googColor;
googPlot.dataLineStyle = googLineStyle;
googPlot.plotSpace = plotSpace2;
CPTMutableLineStyle *googSymbolLineStyle = [CPTMutableLineStyle lineStyle];
googSymbolLineStyle.lineColor = googColor;
CPTPlotSymbol *googSymbol = [CPTPlotSymbol diamondPlotSymbol];
googSymbol.fill = [CPTFill fillWithColor:googColor];
googSymbol.lineStyle = googSymbolLineStyle;
googSymbol.size = CGSizeMake(2.0f, 2.0f);
googPlot.plotSymbol = googSymbol;
CPTMutableTextStyle *axisTitleStyle = [CPTMutableTextStyle textStyle];
axisTitleStyle.color = [CPTColor blackColor];
axisTitleStyle.fontName = @"Helvetica";
axisTitleStyle.fontSize = 10.0f;
CPTMutableLineStyle *axisLineStyle = [CPTMutableLineStyle lineStyle ];
axisLineStyle.lineWidth = 1.0f;
axisLineStyle.lineColor = [CPTColor blackColor];
CPTMutableTextStyle *axisTextStyle = [[CPTMutableTextStyle alloc] init];
axisTextStyle.color = [CPTColor blackColor];
axisTextStyle.fontName = @"Helvetica";
axisTextStyle.fontSize = 8.0f;
CPTMutableLineStyle *tickLineStyle = [CPTMutableLineStyle lineStyle];
tickLineStyle.lineColor = [CPTColor blackColor];
tickLineStyle.lineWidth = 1.0f;
CPTMutableLineStyle *gridLineStyle = [CPTMutableLineStyle lineStyle];
gridLineStyle.lineColor = [CPTColor grayColor];
gridLineStyle.lineWidth = 1.0f;
tickLineStyle.lineColor = [CPTColor blackColor];
tickLineStyle.lineWidth = 1.0f;
CPTXYAxisSet *axisSet = (CPTXYAxisSet *) (id)self.hostView.hostedGraph.axisSet;
axisSet.xAxis.orthogonalCoordinateDecimal = CPTDecimalFromDouble(FinalMinValueY);
CPTXYAxis *x = axisSet.xAxis;
CPTXYAxis *y = axisSet.yAxis;
CPTXYAxis *y2 = [(CPTXYAxis *)[CPTXYAxis alloc] init] ;
//x.title = @"Day of Month";
x.titleTextStyle = axisTitleStyle;
x.titleOffset = 4.0f;
x.axisLineStyle = axisLineStyle;
//x.labelingPolicy = CPTAxisLabelingPolicyNone;
x.labelTextStyle = axisTextStyle;
x.majorTickLineStyle = axisLineStyle;
x.majorTickLength = 2.0f;
x.tickDirection = CPTSignNegative;
x.minorTickLineStyle = nil;
CGFloat dateCount = [Reportdates count];
NSMutableSet *xLabels = [NSMutableSet setWithCapacity:dateCount];
NSMutableSet *xLocations = [NSMutableSet setWithCapacity:dateCount];
NSMutableSet *xMinorLocations = [NSMutableSet setWithCapacity:dateCount];
NSInteger i = 0;
NSInteger intervalValue = 0;
NSArray *ArrDatesForMajorTicks =[self CalculateXasisInterval];
for (NSString *date in Reportdates) {
NSDateFormatter *DateFormatter=[[NSDateFormatter alloc] init];
[DateFormatter setDateFormat:@"MM/dd/yyyy hh:mm:ss a"];
NSDate *d = [DateFormatter dateFromString:date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"MM/dd/yy"];
NSString *st = [dateFormat stringFromDate:d];
// NSLog(@"%@",st);
CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:st textStyle:x.labelTextStyle];
//label.rotation = M_PI/4;
CGFloat location = i;
label.tickLocation = CPTDecimalFromCGFloat(location);
label.offset = x.majorTickLength;
if(i==0 || i==intervalValue)
{
if (label) {
[xLabels addObject:label];
[xLocations addObject:[NSNumber numberWithFloat:location]];
}
intervalValue = intervalValue + FinalIntervalValueX;
}
else
{
[xMinorLocations addObject:[NSNumber numberWithFloat:location]];
}
i++;
}
x.axisLabels = xLabels;
x.majorTickLocations = xLocations;
x.labelingPolicy = CPTAxisLabelingPolicyNone;
// x.minorTickLocations =xMinorLocations;
// 4 - Configure y-axis
//y.title = @"Price";
y.titleTextStyle = axisTitleStyle;
y.titleOffset = -40.0f;
y.axisLineStyle = axisLineStyle;
y.majorGridLineStyle = gridLineStyle;
//y.alternatingBandFills = [NSArray arrayWithObjects:[CPTColor redColor], [CPTColor greenColor], nil];
y.labelingPolicy = CPTAxisLabelingPolicyNone;
y.labelTextStyle = axisTextStyle;
y.labelOffset = 12.0f;
y.majorTickLineStyle = axisLineStyle;
y.majorTickLength = 1.0f;
y.minorTickLength = 1.0f;
y.tickDirection = CPTSignPositive;
//x.preferredNumberOfMajorTicks = 6;
NSInteger majorIncrement = FinalIntervalValueY;
NSInteger minorIncrement = FinalIntervalValueY;
CGFloat yMax = FinalMaxValueY; // should determine dynamically based on max price
NSMutableSet *yLabels = [NSMutableSet set];
NSMutableSet *yMajorLocations = [NSMutableSet set];
NSMutableSet *yMinorLocations = [NSMutableSet set];
for (NSInteger j = FinalMinValueY; j <= yMax; j += minorIncrement) {
NSUInteger mod = j % majorIncrement;
if (mod == 0) {
CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:[NSString stringWithFormat:@"%i", j] textStyle:y.labelTextStyle];
NSDecimal location = CPTDecimalFromInteger(j);
label.tickLocation = location;
//label.offset = -y.majorTickLength - y.labelOffset;
label.offset = -20;
if (label) {
[yLabels addObject:label];
}
[yMajorLocations addObject:[NSDecimalNumber decimalNumberWithDecimal:location]];
} else {
[yMinorLocations addObject:[NSDecimalNumber decimalNumberWithDecimal:CPTDecimalFromInteger(j)]];
}
}
y.axisLabels = yLabels;
y.majorTickLocations = yMajorLocations;
y.minorTickLocations = yMinorLocations;
//y2 axis implementation.
//y2.title = @"Price";
y2.titleTextStyle = axisTitleStyle;
// y2.titleOffset = -40.0f;
CPTMutableTextStyle *axisTextStyleY2 = [[CPTMutableTextStyle alloc] init];
axisTextStyleY2.color = [CPTColor redColor];
axisTextStyleY2.fontName = @"Helvetica";
axisTextStyleY2.fontSize = 18.0f;
y2.axisLineStyle = axisLineStyle;
y2.majorGridLineStyle = Nil;
//y.alternatingBandFills = [NSArray arrayWithObjects:[CPTColor redColor], [CPTColor greenColor], nil];
y2.labelingPolicy = CPTAxisLabelingPolicyNone;
y2.labelTextStyle = axisTextStyleY2;
y2.labelOffset = 12.0f;
y2.majorTickLineStyle = axisLineStyle;
y2.majorTickLength = 1.0f;
y2.minorTickLength = 1.0f;
y2.tickDirection = CPTSignPositive;
y2.axisConstraints = [CPTConstraints constraintWithUpperOffset:0];
y2.labelingPolicy = CPTAxisLabelingPolicyNone;
y2.minorTicksPerInterval = 0;
y2.coordinate = CPTCoordinateY;
y2.plotSpace = plotSpace2;
majorIncrement = FinalIntervalValueY;
minorIncrement = FinalIntervalValueY;
yMax = FinalMaxValueY; // should determine dynamically based on max price
NSMutableSet *yLabels1 = [NSMutableSet set];
NSMutableSet *yMajorLocations1 = [NSMutableSet set];
NSMutableSet *yMinorLocations1 = [NSMutableSet set];
for (NSInteger j = FinalMinValueY; j <= yMax; j += minorIncrement) {
NSUInteger mod = j % majorIncrement;
if (mod == 0) {
CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:[NSString stringWithFormat:@"%i", j] textStyle:y2.labelTextStyle];
NSDecimal location = CPTDecimalFromInteger(j);
label.tickLocation = location;
//label.offset = -y.majorTickLength - y.labelOffset;
label.offset = -20;
if (label) {
[yLabels1 addObject:label];
}
[yMajorLocations1 addObject:[NSDecimalNumber decimalNumberWithDecimal:location]];
} else {
[yMinorLocations1 addObject:[NSDecimalNumber decimalNumberWithDecimal:CPTDecimalFromInteger(j)]];
}
}
y2.axisLabels = yLabels;
y2.majorTickLocations = yMajorLocations1;
y2.minorTickLocations = yMinorLocations1;
x.coordinate = CPTCoordinateX;
y.coordinate = CPTCoordinateY;
y2.coordinate = CPTCoordinateY;
axisSet.axes = [NSArray arrayWithObjects:x, y,y2, nil];
}
-(void)configureAxes {
// 1 - Create styles
}
//data binding.
#pragma mark - Rotation
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft);
}
#pragma mark - CPTPlotDataSource methods
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot {
// return [[[CPDStockPriceStore sharedInstance] datesInMonth] count];
return [Reportdates count];
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index {
NSInteger valueCount = [Reportdates count];
switch (fieldEnum) {
case CPTScatterPlotFieldX:
if (index < valueCount) {
return [NSNumber numberWithUnsignedInteger:index];
}
break;
case CPTScatterPlotFieldY:
if ([plot.identifier isEqual:CPDTickerSymbolAAPL] == YES) {
// return [[[CPDStockPriceStore sharedInstance] monthlyPrices:CPDTickerSymbolAAPL] objectAtIndex:index];
return [ChartValues objectAtIndex:index];
} else if ([plot.identifier isEqual:CPDTickerSymbolGOOG] == YES) {
// return [[[CPDStockPriceStore sharedInstance] monthlyPrices:CPDTickerSymbolGOOG] objectAtIndex:index];
return [ChartValues objectAtIndex:index];
} else if ([plot.identifier isEqual:CPDTickerSymbolMSFT] == YES) {
return [[[CPDStockPriceStore sharedInstance] monthlyPrices:CPDTickerSymbolMSFT] objectAtIndex:index];
}
break;
}
return [NSDecimalNumber zero];
}
答案 0 :(得分：1)
刻度线只有1个像素长（y2.majorTickLength = 1.0f;），与轴线的宽度相同。由于它们使用相同的样式，因此在轴线顶部绘制时它们是不可见的。使刻度更长或不同颜色，以便您可以看到它们。