创建散点图时,它会自动标记图表本身上的点。我发现这非常烦人,并希望将其关闭,因为它对我们正在做的事情没有用。有没有办法没有删除所有标签?
要清除,这些显示没有添加任何注释..我想删除此默认行为。
我想删除图表中的1,2,3,4,5,6,7等。
以下是我用来创建图表的代码。正如您所看到的,它没有设置任何注释等。
-(void) constructScatterPlot
{
// Create graph from theme
graph = [[CPTXYGraph alloc] initWithFrame:CGRectZero];
CPTTheme *theme = [CPTTheme themeNamed:kCPTDarkGradientTheme];
[graph applyTheme:theme];
scatterPlotView.hostedGraph = graph;
graph.paddingLeft = 0.0;
graph.paddingTop = 0.0;
graph.paddingRight = 0.0;
graph.paddingBottom = 0.0
// Setup plot space
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace;
plotSpace.allowsUserInteraction = NO;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-2.5) length:CPTDecimalFromFloat(28)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-5) length:CPTDecimalFromFloat(desiredPeak+10)];
NSArray *exclusionRanges = [NSArray arrayWithObjects:[CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-1) length:CPTDecimalFromFloat(-100)],
[CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(25) length:CPTDecimalFromFloat(10000)], nil];
// Axes
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)graph.axisSet;
CPTXYAxis *x = axisSet.xAxis;
x.majorIntervalLength = CPTDecimalFromString(@"4");
x.minorTicksPerInterval = 4;
x.minorTickLength = 5.0f;
x.majorTickLength = 7.0f;
x.orthogonalCoordinateDecimal = CPTDecimalFromString(@"0");
x.minorTicksPerInterval = 10;
x.labelExclusionRanges = exclusionRanges;
exclusionRanges = [NSArray arrayWithObjects:[CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-1) length:CPTDecimalFromFloat(-100)],
[CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(101) length:CPTDecimalFromFloat(10000)], nil];
CPTXYAxis *y = axisSet.yAxis;
y.majorIntervalLength = CPTDecimalFromString(@"10");
y.minorTicksPerInterval = 20;
y.orthogonalCoordinateDecimal = CPTDecimalFromString(@"0");
y.labelExclusionRanges = exclusionRanges;
// Put an area gradient under the plot above
CPTColor *areaColor = [CPTColor colorWithComponentRed:0.3 green:1.0 blue:0.3 alpha:0.8];
CPTGradient *areaGradient = [CPTGradient gradientWithBeginningColor:areaColor endingColor:[CPTColor clearColor]];
areaGradient.angle = -90.0f;
CPTFill *areaGradientFill = [CPTFill fillWithGradient:areaGradient];
// Create a blue plot area
CPTScatterPlot *boundLinePlot = [[CPTScatterPlot alloc] init];
boundLinePlot.identifier = @"Blue Plot";
CPTMutableLineStyle *lineStyle = [boundLinePlot.dataLineStyle mutableCopy];
//lineStyle.miterLimit = 1.0f;
lineStyle.lineWidth = 3.0f;
lineStyle.lineColor = [CPTColor blueColor];
lineStyle.dashPattern = [NSArray arrayWithObjects:[NSNumber numberWithFloat:5.0f], [NSNumber numberWithFloat:5.0f], nil];
boundLinePlot.dataSource = self;
boundLinePlot.cachePrecision = CPTPlotCachePrecisionDecimal;//Double;
boundLinePlot.interpolation = CPTScatterPlotInterpolationCurved;//Histogram;
[graph addPlot:boundLinePlot];
// Do a blue gradient
CPTColor *areaColor1 = [CPTColor colorWithComponentRed:0.3 green:0.3 blue:1.0 alpha:0.8];
CPTGradient *areaGradient1 = [CPTGradient gradientWithBeginningColor:areaColor1 endingColor:[CPTColor clearColor]];
areaGradient1.angle = -90.0f;
areaGradientFill = [CPTFill fillWithGradient:areaGradient1];
boundLinePlot.areaFill = areaGradientFill;
boundLinePlot.areaBaseValue = [[NSDecimalNumber zero] decimalValue];
CABasicAnimation *fadeInAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeInAnimation.duration = 1.0f;
fadeInAnimation.removedOnCompletion = NO;
fadeInAnimation.fillMode = kCAFillModeForwards;
fadeInAnimation.toValue = [NSNumber numberWithFloat:1.0];
[boundLinePlot addAnimation:fadeInAnimation forKey:@"animateOpacity"];
}
默认情况下会启用某些内容。
感谢您的帮助。
-David
答案 0 :(得分:5)
如果您通过以下方式触摸,也可以将其显示在图表上:
-(void)scatterPlot:(CPTScatterPlot *)plot
plotSymbolWasSelectedAtRecordIndex:(NSUInteger)index
{
int plotNumber = 0;
for (int i = 0; i < [mainDataForPlot count]; i++)
{
if ([mainDataForPlot objectAtIndex:i] != [NSNull null]
&&
[(NSString *)plot.identifier isEqualToString:
[NSString stringWithFormat:@"%@-%@",[[mainDataForPlot objectAtIndex:i] objectAtIndex:0],[[mainDataForPlot objectAtIndex:i] objectAtIndex:1]]
])
{
plotNumber = i;
break;
}
}
if (self.symbolTextAnnotation != nil)
{
self.symbolTextAnnotation = nil;
}
// Setup a style for the annotation
CPTMutableTextStyle *hitAnnotationTextStyle = [CPTMutableTextStyle textStyle];
hitAnnotationTextStyle.color = [CPTColor whiteColor];
hitAnnotationTextStyle.fontSize = 16.0f;
hitAnnotationTextStyle.fontName = @"Helvetica-Bold";
// Determine point of symbol in plot coordinates
NSNumber *x = [NSNumber numberWithInt:index];
NSNumber *y = [[[mainDataForPlot objectAtIndex:plotNumber] objectAtIndex:3] objectAtIndex:index];
NSArray *anchorPoint = [NSArray arrayWithObjects:x, y, nil];
// Add annotation
// First make a string for the y value
NSNumberFormatter *formatter = [[[NSNumberFormatter alloc] init] autorelease];
[formatter setMaximumFractionDigits:2];
NSString *yString = [formatter stringFromNumber:y];
// Now add the annotation to the plot area
CPTTextLayer *textLayer = [[[CPTTextLayer alloc] initWithText:yString style:hitAnnotationTextStyle] autorelease];
self.symbolTextAnnotation = [[[CPTPlotSpaceAnnotation alloc] initWithPlotSpace:(CPTXYPlotSpace *)self.graph.defaultPlotSpace anchorPlotPoint:anchorPoint] autorelease];
self.symbolTextAnnotation.contentLayer = textLayer;
self.symbolTextAnnotation.displacement = CGPointMake(0.0f, 20.0f);
[graph.plotAreaFrame.plotArea addAnnotation:symbolTextAnnotation];
}
答案 1 :(得分:1)
默认情况下不显示“数据标签”(每个点上方的标签)。自动标签需要labelTextStyle
和labelFormatter
。这两个属性都默认为隐藏标签的nil
。