我正在尝试创建一个类似于下面的条形图 - 其中 x 轴有 2 个不同的标签 - 一个是条形本身的标签,表示性能,另一个在轴的底部,表示年份。只有数字需要旋转显示,在图表上而不是在顶部。
我通过创建自定义标签来展示岁月。-dataLabelForPlot:recordIndex:
通过实施该方法,我还可以显示条形图的性能数据。性能数据显示但水平,但我希望能够将性能数据旋转 90 度。在绘图上设置labelRotation
无济于事,因为我已将 设置为labelingPolicy
,CPTAxisLabelingPolicyNone
因此我可以添加自定义标签。
下面是我的代码:
-(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index
{
CPTMutableTextStyle *axisTitleTextStyle = [CPTMutableTextStyle textStyle];
axisTitleTextStyle.fontSize = 10.0;
axisTitleTextStyle.color = [CPTColor blackColor];
CPTTextLayer *label = [[CPTTextLayer alloc] init];
label.textStyle = axisTitleTextStyle;
if ( [plot isKindOfClass:[CPTBarPlot class]] ) {
if ( [plot.identifier isEqual:@"Fund"] ) {
label.text = [[[self dataGroup1] objectAtIndex:index] stringValue];
}
else if ( [plot.identifier isEqual:@"Benchmark"] ) {
label.text = [[[self dataGroup2] objectAtIndex:index] stringValue];
}
}
return [label autorelease];
}
- (void) drawGraph
{
graphHostingView_ = [[CPTGraphHostingView alloc] initWithFrame:self.bounds];
calPerfGraph_ = [[CPTXYGraph alloc] initWithFrame:self.bounds];
graphHostingView_.hostedGraph = calPerfGraph_;
[self addSubview:graphHostingView_];
calPerfGraph_.plotAreaFrame.masksToBorder = NO;
calPerfGraph_.paddingLeft = 5.0;
calPerfGraph_.paddingTop = 20.0;
calPerfGraph_.paddingRight = 10.0;
calPerfGraph_.paddingBottom =20.0;
calPerfGraph_.plotAreaFrame.paddingTop = 10.0;
calPerfGraph_.plotAreaFrame.paddingBottom = 50.0;
calPerfGraph_.plotAreaFrame.paddingLeft = 10.0;
calPerfGraph_.plotAreaFrame.paddingRight = 35.0;
// Y axis scale - round to nearest ten
int maxYScale = (([[self getPositiveMax] intValue] / 10 ) + 1) * 10;
int minYScale = (([[self getNegativeMax] intValue] / 10 ) + 1) * 10;
// Styles
CPTMutableLineStyle *lineStyle = [CPTMutableLineStyle lineStyle];
lineStyle.lineColor = [CPTColor grayColor];
lineStyle.lineWidth = 2.0f;
CPTMutableLineStyle *gridLineStyle = [CPTMutableLineStyle lineStyle];
gridLineStyle.lineColor = [CPTColor grayColor];
gridLineStyle.lineWidth = 1.0f;
// X axis
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)calPerfGraph_.axisSet;
axisSet.xAxis.minorTicksPerInterval = 0;
axisSet.xAxis.majorTickLineStyle = lineStyle;
axisSet.xAxis.axisLineStyle = lineStyle;
axisSet.xAxis.majorTickLength = 0;
axisSet.xAxis.labelingPolicy = CPTAxisLabelingPolicyNone;
axisSet.xAxis.axisConstraints = [CPTConstraints constraintWithLowerOffset:0]; // Bring labels to the bottom on the plot
axisSet.xAxis.labelRotation = M_PI/2;
int currentYear = [self getCurrentYear];
NSMutableArray *customLabels = [NSMutableArray arrayWithCapacity:6];
for (int i=currentYear-5,count=1; currentYear>=i; i++,count++) {
CPTAxisLabel *newLabel = [[CPTAxisLabel alloc] initWithText:[NSString stringWithFormat:@"%d",i] textStyle:axisSet.xAxis.labelTextStyle];
newLabel.tickLocation = CPTDecimalFromInt(count);
newLabel.offset = axisSet.xAxis.labelOffset + axisSet.xAxis.majorTickLength;
[customLabels addObject:newLabel];
[newLabel release];
}
axisSet.xAxis.axisLabels = [NSSet setWithArray:customLabels];
// Y axis
if ( maxYScale >= 40 || minYScale >= 40) {
axisSet.yAxis.majorIntervalLength = [[NSDecimalNumber decimalNumberWithString:@"20"] decimalValue];
}
else {
axisSet.yAxis.majorIntervalLength = [[NSDecimalNumber decimalNumberWithString:@"10"] decimalValue];
}
axisSet.yAxis.minorTicksPerInterval = 0;
axisSet.yAxis.majorTickLength = 0;
axisSet.yAxis.majorGridLineStyle = gridLineStyle;
axisSet.yAxis.axisLineStyle = nil;
axisSet.yAxis.axisConstraints = [CPTConstraints constraintWithUpperOffset:0]; // Bring labels to the right end of the plot
axisSet.yAxis.tickDirection = CPTSignPositive;
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)calPerfGraph_.defaultPlotSpace;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(0.0) length:CPTDecimalFromDouble([[self calPerfFundData] count]+1)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(-minYScale) length:CPTDecimalFromDouble(minYScale + maxYScale)];
CPTBarPlot *barPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor greenColor] horizontalBars:NO];
barPlot.baseValue = CPTDecimalFromString(@"0");
barPlot.dataSource = self;
barPlot.barOffset = CPTDecimalFromFloat(.7);
barPlot.identifier = @"Fund";
barPlot.barWidth = CPTDecimalFromFloat(.25);
[barPlot addAnimation:[self animateVerticalBars] forKey:@"FundAnimation"];
[calPerfGraph_ addPlot:barPlot toPlotSpace:plotSpace];
CPTBarPlot *bbarPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor colorWithComponentRed:0.9 green:0.9 blue:0.9 alpha:0.8] horizontalBars:NO];
bbarPlot.baseValue = CPTDecimalFromString(@"0");
bbarPlot.dataSource = self;
bbarPlot.barOffset = CPTDecimalFromFloat(1);
bbarPlot.barWidth = CPTDecimalFromFloat(.25);
bbarPlot.identifier = @"Benchmark";
[bbarPlot addAnimation:[self animateVerticalBars] forKey:@"BenchmarkAnimation"];
[calPerfGraph_ addPlot:bbarPlot toPlotSpace:plotSpace];
}
如何旋转条上的性能数据?任何帮助表示赞赏。谢谢。