在 coreplot 上丢失 x-axis 刻度标题
Losing the x-axis tick titles on coreplot
我的 x 轴刻度标记标签似乎自行消失了。有时他们表现得很好，有时他们从视野中消失了。我假设它可以做我的数据缩放，但我已经尝试了很多东西并且我可以修复它。我的代码如下（我几乎直接从其中一个复制了它
的例子）。我的价值观都是积极的。
如果您有任何建议，请告诉我。
谢谢
-(void)configureHostFour {
self.hostView = [(CPTGraphHostingView *) [CPTGraphHostingView alloc] initWithFrame:self.view.bounds];
self.hostView.allowPinchScaling = YES;
[self.myViewFour addSubview:self.hostView];
CPTGraphHostingView *BarGraphView = [[CPTGraphHostingView alloc] init];
self.hostView.frame = CGRectMake(self.myViewFour.bounds.origin.x, self.myViewFour.bounds.origin.y, self.myViewFour.bounds.size.width, self.myViewFour.bounds.size.height);
[self.hostView addSubview:BarGraphView];
}
-(void)configureGraphFour {
// 1 - Create the graph
CPTGraph *graph = [[CPTXYGraph alloc] initWithFrame:self.hostView.bounds];
// [graph applyTheme:[CPTTheme themeNamed:kCPTSlateTheme]];
[graph applyTheme:[CPTTheme themeNamed:kCPTPlainWhiteTheme]];
self.hostView.hostedGraph = graph;
// 2 - Set graph title
NSString *title = @"Heart Rate";
graph.title = title;
// 3 - Create and set text style
CPTMutableTextStyle *titleStyle = [CPTMutableTextStyle textStyle];
titleStyle.color = [CPTColor blackColor];
titleStyle.fontName = @"Helvetica-Bold";
titleStyle.fontSize = 12.0f;
graph.titleTextStyle = titleStyle;
graph.titlePlotAreaFrameAnchor = CPTRectAnchorTop;
graph.titleDisplacement = CGPointMake(0.0f, 17.0f);
// 4 - Set padding for plot area
[graph.plotAreaFrame setPaddingLeft:1.0f];
[graph.plotAreaFrame setPaddingBottom:1.0f];
// 5 - Enable user interactions for plot space
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;
plotSpace.allowsUserInteraction = YES;
}
-(void)configurePlotsFour {
// 1 - Get graph and plot space
CPTGraph *graph = self.hostView.hostedGraph;
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;
// 2 - Create the plots
CPTScatterPlot *hrPlot = [[CPTScatterPlot alloc] init];
hrPlot.dataSource = self;
hrPlot.identifier = hrSCORE;
CPTColor *hrColor = [CPTColor blueColor];
[graph addPlot:hrPlot toPlotSpace:plotSpace];
CPTScatterPlot *avghrPlot = [[CPTScatterPlot alloc] init];
avghrPlot.dataSource = self;
avghrPlot.identifier = hrSCOREAVG;
CPTColor *avghrColor = [CPTColor redColor];
[graph addPlot:avghrPlot toPlotSpace:plotSpace];
// 3 - Set up plot space
[plotSpace scaleToFitPlots:[NSArray arrayWithObjects:hrPlot, avghrPlot, 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 *hrLineStyle = [hrPlot.dataLineStyle mutableCopy];
hrLineStyle.lineWidth = 2.0;
hrLineStyle.lineColor = hrColor;
hrPlot.dataLineStyle = hrLineStyle;
CPTMutableLineStyle *hrSymbolLineStyle = [CPTMutableLineStyle lineStyle];
hrSymbolLineStyle.lineColor = hrColor;
CPTMutableLineStyle *avghrLineStyle = [hrPlot.dataLineStyle mutableCopy];
avghrLineStyle.lineWidth = 2.0;
avghrLineStyle.lineColor = avghrColor;
avghrPlot.dataLineStyle = avghrLineStyle;
CPTMutableLineStyle *avghrSymbolLineStyle = [CPTMutableLineStyle lineStyle];
avghrSymbolLineStyle.lineColor = avghrColor;
}
-(void)configureAxesFour{
// 1 - Create styles
CPTMutableTextStyle *axisTitleStyle = [CPTMutableTextStyle textStyle];
axisTitleStyle.color = [CPTColor blackColor];
axisTitleStyle.fontName = @"Helvetica-Bold";
axisTitleStyle.fontSize = 10.0f;
CPTMutableLineStyle *axisLineStyle = [CPTMutableLineStyle lineStyle];
axisLineStyle.lineWidth = .01f;
axisLineStyle.lineColor = [CPTColor blackColor];
CPTMutableTextStyle *axisTextStyle = [[CPTMutableTextStyle alloc] init];
axisTextStyle.color = [CPTColor blackColor];
axisTextStyle.fontName = @"Helvetica-Bold";
axisTextStyle.fontSize = 9.0f;
CPTMutableLineStyle *tickLineStyle = [CPTMutableLineStyle lineStyle];
tickLineStyle.lineColor = [CPTColor blackColor];
tickLineStyle.lineWidth = 1.0f;
CPTMutableLineStyle *gridLineStyle = [CPTMutableLineStyle lineStyle];
tickLineStyle.lineColor = [CPTColor blackColor];
tickLineStyle.lineWidth = 1.0f;
// 2 - Get axis set
CPTXYAxisSet *axisSet = (CPTXYAxisSet *) self.hostView.hostedGraph.axisSet;
// 3 - Configure x-axis
CPTAxis *x = axisSet.xAxis;
x.title = @"Day of Month";
x.titleTextStyle = axisTitleStyle;
x.titleOffset = 20.0f;
x.axisLineStyle = axisLineStyle;
x.labelingPolicy = CPTAxisLabelingPolicyNone;
x.labelTextStyle = axisTextStyle;
x.majorTickLineStyle = axisLineStyle;
x.majorTickLength = 4.0f;
x.tickDirection = CPTSignNegative;
CGFloat dateCount = [self.dateArray count];
NSMutableSet *xLabels = [NSMutableSet setWithCapacity:dateCount];
NSMutableSet *xLocations = [NSMutableSet setWithCapacity:dateCount];
NSInteger i = 0;
for (NSString *date in self.dateArray) {
CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:date textStyle:x.labelTextStyle];
CGFloat location = i++;
label.tickLocation = CPTDecimalFromCGFloat(location);
label.offset = x.majorTickLength;
if (label) {
[xLabels addObject:label];
[xLocations addObject:[NSNumber numberWithFloat:location]];
}
}
x.axisLabels = xLabels;
x.majorTickLocations = xLocations;
// 4 - Configure y-axis
CPTAxis *y = axisSet.yAxis;
y.title = @"";
y.titleTextStyle = axisTitleStyle;
y.titleOffset = -40.0f;
y.axisLineStyle = axisLineStyle;
y.majorGridLineStyle = gridLineStyle;
y.labelingPolicy = CPTAxisLabelingPolicyNone;
y.labelTextStyle = axisTextStyle;
y.labelOffset = 16.0f;
y.majorTickLineStyle = axisLineStyle;
y.majorTickLength = 4.0f;
y.minorTickLength = 2.0f;
y.tickDirection = CPTSignPositive;
NSInteger majorIncrement = self.hrTick;
NSInteger minorIncrement = self.hrHalfTick;
CGFloat yMax = 700.0f; // should determine dynamically based on max price
NSMutableSet *yLabels = [NSMutableSet set];
NSMutableSet *yMajorLocations = [NSMutableSet set];
NSMutableSet *yMinorLocations = [NSMutableSet set];
for (NSInteger j = minorIncrement; j <= yMax; j += minorIncrement) {
NSUInteger mod = j % majorIncrement;
if (mod == 0) {
CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:[NSString stringWithFormat:@"%li", (long)j] textStyle:y.labelTextStyle];
NSDecimal location = CPTDecimalFromInteger(j);
label.tickLocation = location;
label.offset = -y.majorTickLength - y.labelOffset;
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;
}
#pragma mark - CPTPlotDataSource methods
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot {
return [self.dateArray count];
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index {
NSInteger valueCount = [self.dateArray count];
switch (fieldEnum) {
case CPTScatterPlotFieldX:
if (index < valueCount) {
return [NSNumber numberWithUnsignedInteger:index];
}
break;
case CPTScatterPlotFieldY:
if ([plot.identifier isEqual:hrSCORE] == YES) {
NSLog(@"hrscore");
return [self.hrArray objectAtIndex:index];
} else if ([plot.identifier isEqual:hrSCOREAVG] == YES) {
NSLog(@"hravg");
return [self.avgHrArray objectAtIndex:index];
} else if ([plot.identifier isEqual:fgSCORE] == YES) {
NSLog(@"gfscore");
return [self.fgArray objectAtIndex:index];
} else if ([plot.identifier isEqual:fgSCOREAVG] == YES) {
NSLog(@"fgavg");
return [self.avgFgArray objectAtIndex:index];
} else if ([plot.identifier isEqual:weightSCORE] == YES) {
NSLog(@"weight");
return [self.weightArray objectAtIndex:index];
} else if ([plot.identifier isEqual:weightSCOREAVG] == YES) {
NSLog(@"weight av");
return [self.avgWeightArray objectAtIndex:index];
} else if ([plot.identifier isEqual:mapSCORE] == YES) {
NSLog(@"map");
return [self.mapArray objectAtIndex:index];
} else if ([plot.identifier isEqual:mapSCOREAVG] == YES) {
NSLog(@"map avg");
return [self.avgMapArray objectAtIndex:index];
}
break;
}
return [NSDecimalNumber zero];
}
刻度位置和标签被放置在从零 (0) 开始的整数值上。你没有说 xRange 是什么，但如果它的 length 小于一 (1) 并且它没有覆盖其中一个刻度位置，你将看不到任何刻度或标签.
我的 x 轴刻度标记标签似乎自行消失了。有时他们表现得很好，有时他们从视野中消失了。我假设它可以做我的数据缩放，但我已经尝试了很多东西并且我可以修复它。我的代码如下（我几乎直接从其中一个复制了它 的例子）。我的价值观都是积极的。 如果您有任何建议，请告诉我。 谢谢
-(void)configureHostFour {
self.hostView = [(CPTGraphHostingView *) [CPTGraphHostingView alloc] initWithFrame:self.view.bounds];
self.hostView.allowPinchScaling = YES;
[self.myViewFour addSubview:self.hostView];
CPTGraphHostingView *BarGraphView = [[CPTGraphHostingView alloc] init];
self.hostView.frame = CGRectMake(self.myViewFour.bounds.origin.x, self.myViewFour.bounds.origin.y, self.myViewFour.bounds.size.width, self.myViewFour.bounds.size.height);
[self.hostView addSubview:BarGraphView];
}
-(void)configureGraphFour {
// 1 - Create the graph
CPTGraph *graph = [[CPTXYGraph alloc] initWithFrame:self.hostView.bounds];
// [graph applyTheme:[CPTTheme themeNamed:kCPTSlateTheme]];
[graph applyTheme:[CPTTheme themeNamed:kCPTPlainWhiteTheme]];
self.hostView.hostedGraph = graph;
// 2 - Set graph title
NSString *title = @"Heart Rate";
graph.title = title;
// 3 - Create and set text style
CPTMutableTextStyle *titleStyle = [CPTMutableTextStyle textStyle];
titleStyle.color = [CPTColor blackColor];
titleStyle.fontName = @"Helvetica-Bold";
titleStyle.fontSize = 12.0f;
graph.titleTextStyle = titleStyle;
graph.titlePlotAreaFrameAnchor = CPTRectAnchorTop;
graph.titleDisplacement = CGPointMake(0.0f, 17.0f);
// 4 - Set padding for plot area
[graph.plotAreaFrame setPaddingLeft:1.0f];
[graph.plotAreaFrame setPaddingBottom:1.0f];
// 5 - Enable user interactions for plot space
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;
plotSpace.allowsUserInteraction = YES;
}
-(void)configurePlotsFour {
// 1 - Get graph and plot space
CPTGraph *graph = self.hostView.hostedGraph;
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;
// 2 - Create the plots
CPTScatterPlot *hrPlot = [[CPTScatterPlot alloc] init];
hrPlot.dataSource = self;
hrPlot.identifier = hrSCORE;
CPTColor *hrColor = [CPTColor blueColor];
[graph addPlot:hrPlot toPlotSpace:plotSpace];
CPTScatterPlot *avghrPlot = [[CPTScatterPlot alloc] init];
avghrPlot.dataSource = self;
avghrPlot.identifier = hrSCOREAVG;
CPTColor *avghrColor = [CPTColor redColor];
[graph addPlot:avghrPlot toPlotSpace:plotSpace];
// 3 - Set up plot space
[plotSpace scaleToFitPlots:[NSArray arrayWithObjects:hrPlot, avghrPlot, 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 *hrLineStyle = [hrPlot.dataLineStyle mutableCopy];
hrLineStyle.lineWidth = 2.0;
hrLineStyle.lineColor = hrColor;
hrPlot.dataLineStyle = hrLineStyle;
CPTMutableLineStyle *hrSymbolLineStyle = [CPTMutableLineStyle lineStyle];
hrSymbolLineStyle.lineColor = hrColor;
CPTMutableLineStyle *avghrLineStyle = [hrPlot.dataLineStyle mutableCopy];
avghrLineStyle.lineWidth = 2.0;
avghrLineStyle.lineColor = avghrColor;
avghrPlot.dataLineStyle = avghrLineStyle;
CPTMutableLineStyle *avghrSymbolLineStyle = [CPTMutableLineStyle lineStyle];
avghrSymbolLineStyle.lineColor = avghrColor;
}
-(void)configureAxesFour{
// 1 - Create styles
CPTMutableTextStyle *axisTitleStyle = [CPTMutableTextStyle textStyle];
axisTitleStyle.color = [CPTColor blackColor];
axisTitleStyle.fontName = @"Helvetica-Bold";
axisTitleStyle.fontSize = 10.0f;
CPTMutableLineStyle *axisLineStyle = [CPTMutableLineStyle lineStyle];
axisLineStyle.lineWidth = .01f;
axisLineStyle.lineColor = [CPTColor blackColor];
CPTMutableTextStyle *axisTextStyle = [[CPTMutableTextStyle alloc] init];
axisTextStyle.color = [CPTColor blackColor];
axisTextStyle.fontName = @"Helvetica-Bold";
axisTextStyle.fontSize = 9.0f;
CPTMutableLineStyle *tickLineStyle = [CPTMutableLineStyle lineStyle];
tickLineStyle.lineColor = [CPTColor blackColor];
tickLineStyle.lineWidth = 1.0f;
CPTMutableLineStyle *gridLineStyle = [CPTMutableLineStyle lineStyle];
tickLineStyle.lineColor = [CPTColor blackColor];
tickLineStyle.lineWidth = 1.0f;
// 2 - Get axis set
CPTXYAxisSet *axisSet = (CPTXYAxisSet *) self.hostView.hostedGraph.axisSet;
// 3 - Configure x-axis
CPTAxis *x = axisSet.xAxis;
x.title = @"Day of Month";
x.titleTextStyle = axisTitleStyle;
x.titleOffset = 20.0f;
x.axisLineStyle = axisLineStyle;
x.labelingPolicy = CPTAxisLabelingPolicyNone;
x.labelTextStyle = axisTextStyle;
x.majorTickLineStyle = axisLineStyle;
x.majorTickLength = 4.0f;
x.tickDirection = CPTSignNegative;
CGFloat dateCount = [self.dateArray count];
NSMutableSet *xLabels = [NSMutableSet setWithCapacity:dateCount];
NSMutableSet *xLocations = [NSMutableSet setWithCapacity:dateCount];
NSInteger i = 0;
for (NSString *date in self.dateArray) {
CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:date textStyle:x.labelTextStyle];
CGFloat location = i++;
label.tickLocation = CPTDecimalFromCGFloat(location);
label.offset = x.majorTickLength;
if (label) {
[xLabels addObject:label];
[xLocations addObject:[NSNumber numberWithFloat:location]];
}
}
x.axisLabels = xLabels;
x.majorTickLocations = xLocations;
// 4 - Configure y-axis
CPTAxis *y = axisSet.yAxis;
y.title = @"";
y.titleTextStyle = axisTitleStyle;
y.titleOffset = -40.0f;
y.axisLineStyle = axisLineStyle;
y.majorGridLineStyle = gridLineStyle;
y.labelingPolicy = CPTAxisLabelingPolicyNone;
y.labelTextStyle = axisTextStyle;
y.labelOffset = 16.0f;
y.majorTickLineStyle = axisLineStyle;
y.majorTickLength = 4.0f;
y.minorTickLength = 2.0f;
y.tickDirection = CPTSignPositive;
NSInteger majorIncrement = self.hrTick;
NSInteger minorIncrement = self.hrHalfTick;
CGFloat yMax = 700.0f; // should determine dynamically based on max price
NSMutableSet *yLabels = [NSMutableSet set];
NSMutableSet *yMajorLocations = [NSMutableSet set];
NSMutableSet *yMinorLocations = [NSMutableSet set];
for (NSInteger j = minorIncrement; j <= yMax; j += minorIncrement) {
NSUInteger mod = j % majorIncrement;
if (mod == 0) {
CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:[NSString stringWithFormat:@"%li", (long)j] textStyle:y.labelTextStyle];
NSDecimal location = CPTDecimalFromInteger(j);
label.tickLocation = location;
label.offset = -y.majorTickLength - y.labelOffset;
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;
}
#pragma mark - CPTPlotDataSource methods
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot {
return [self.dateArray count];
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index {
NSInteger valueCount = [self.dateArray count];
switch (fieldEnum) {
case CPTScatterPlotFieldX:
if (index < valueCount) {
return [NSNumber numberWithUnsignedInteger:index];
}
break;
case CPTScatterPlotFieldY:
if ([plot.identifier isEqual:hrSCORE] == YES) {
NSLog(@"hrscore");
return [self.hrArray objectAtIndex:index];
} else if ([plot.identifier isEqual:hrSCOREAVG] == YES) {
NSLog(@"hravg");
return [self.avgHrArray objectAtIndex:index];
} else if ([plot.identifier isEqual:fgSCORE] == YES) {
NSLog(@"gfscore");
return [self.fgArray objectAtIndex:index];
} else if ([plot.identifier isEqual:fgSCOREAVG] == YES) {
NSLog(@"fgavg");
return [self.avgFgArray objectAtIndex:index];
} else if ([plot.identifier isEqual:weightSCORE] == YES) {
NSLog(@"weight");
return [self.weightArray objectAtIndex:index];
} else if ([plot.identifier isEqual:weightSCOREAVG] == YES) {
NSLog(@"weight av");
return [self.avgWeightArray objectAtIndex:index];
} else if ([plot.identifier isEqual:mapSCORE] == YES) {
NSLog(@"map");
return [self.mapArray objectAtIndex:index];
} else if ([plot.identifier isEqual:mapSCOREAVG] == YES) {
NSLog(@"map avg");
return [self.avgMapArray objectAtIndex:index];
}
break;
}
return [NSDecimalNumber zero];
}
刻度位置和标签被放置在从零 (0) 开始的整数值上。你没有说 xRange 是什么，但如果它的 length 小于一 (1) 并且它没有覆盖其中一个刻度位置，你将看不到任何刻度或标签.