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我有一个奇怪的问题，我的coreplot图。 我有六个y轴，他们都有策略“CPTAxisLabelingPolicyEqualDivisions”。 图形可以滚动，轴上的标签已正确更新。 但有时，当我尝试向下滚动图表时，特定轴的最后一个标签消失。核心绘图1.2 - CPTAxisLabelingPolicyEqualDivisions，轴有时不显示最后的标签
这是为创建所述轴线和相对地块的代码，plotspace：
CPTXYAxis *A_Axis = [[CPTXYAxis alloc] init] ;
A_Axis.coordinate = CPTCoordinateY;
A_Axis.orthogonalCoordinateDecimal = CPTDecimalFromCGFloat(_ASpace.yRange.locationDouble);
A_Axis.labelingPolicy = CPTAxisLabelingPolicyEqualDivisions;
A_Axis.majorGridLineStyle = majorGridLineStyle;
A_Axis.minorGridLineStyle = minorGridLineStyle;
A_Axis.preferredNumberOfMajorTicks = MAX_NUMBER_LABEL;
A_Axis.minorTicksPerInterval = 0;
A_Axis.labelOffset = 3.0;
A_Axis.labelPositionY = 0.0;
labelTextStyle.color = [CPTColor colorWithCGColor:A_Color.CGColor];
A_Axis.tickDirection = CPTSignNegative;
A_Axis.labelTextStyle = labelTextStyle;
A_Axis.axisConstraints = [CPTConstraints constraintWithRelativeOffset:0.0];
A_Axis.plotSpace = _ASpace;
CPTXYAxis *B_Axis = [[CPTXYAxis alloc] init] ;
B_Axis.coordinate = CPTCoordinateY;
B_Axis.orthogonalCoordinateDecimal = CPTDecimalFromCGFloat(_BSpace.yRange.locationDouble);
B_Axis.labelingPolicy = CPTAxisLabelingPolicyEqualDivisions;
B_Axis.majorGridLineStyle = majorGridLineStyle;
B_Axis.preferredNumberOfMajorTicks = MAX_NUMBER_LABEL;
B_Axis.minorTicksPerInterval = 0;
B_Axis.labelOffset = 3.0;
B_Axis.labelPositionY = 11.0;
labelTextStyle.color = [CPTColor colorWithCGColor:B_Color.CGColor];
B_Axis.tickDirection = CPTSignNegative;
B_Axis.labelTextStyle = labelTextStyle;
B_Axis.axisConstraints = [CPTConstraints constraintWithRelativeOffset:0.0];
B_Axis.plotSpace = _BSpace;
CPTXYAxis *C_Axis = [[CPTXYAxis alloc] init] ;
C_Axis.coordinate = CPTCoordinateY;
C_Axis.orthogonalCoordinateDecimal = CPTDecimalFromCGFloat(_CSpace.yRange.locationDouble);
C_Axis.labelingPolicy = CPTAxisLabelingPolicyEqualDivisions;
C_Axis.majorGridLineStyle = majorGridLineStyle;
C_Axis.preferredNumberOfMajorTicks = MAX_NUMBER_LABEL;
C_Axis.minorTicksPerInterval = 0;
C_Axis.labelOffset = 3.0;
C_Axis.labelPositionY = 22.0;
labelTextStyle.color = [CPTColor colorWithCGColor:C_Color.CGColor];
C_Axis.tickDirection = CPTSignNegative;
C_Axis.labelTextStyle = labelTextStyle;
C_Axis.axisConstraints = [CPTConstraints constraintWithRelativeOffset:0.0];
C_Axis.plotSpace = _CSpace;
CPTXYAxis *D_Axis = [[CPTXYAxis alloc] init] ;
D_Axis.coordinate = CPTCoordinateY;
D_Axis.orthogonalCoordinateDecimal = CPTDecimalFromCGFloat(_DSpace.yRange.locationDouble);
D_Axis.labelingPolicy = CPTAxisLabelingPolicyEqualDivisions;
D_Axis.majorGridLineStyle = majorGridLineStyle;
D_Axis.minorGridLineStyle = minorGridLineStyle;
D_Axis.preferredNumberOfMajorTicks = MAX_NUMBER_LABEL;
D_Axis.minorTicksPerInterval = 0;
D_Axis.labelOffset = 3.0;
D_Axis.labelPositionY = 0.0;
labelTextStyle.color = [CPTColor colorWithCGColor:D_Color.CGColor];
D_Axis.tickDirection = CPTSignPositive;
D_Axis.labelTextStyle = labelTextStyle;
D_Axis.axisConstraints = [CPTConstraints constraintWithRelativeOffset:1.0];
D_Axis.plotSpace = _DSpace;
CPTXYAxis *E_Axis = [[CPTXYAxis alloc] init] ;
E_Axis.coordinate = CPTCoordinateY;
E_Axis.orthogonalCoordinateDecimal = CPTDecimalFromCGFloat(_ESpace.yRange.locationDouble);
E_Axis.labelingPolicy = CPTAxisLabelingPolicyEqualDivisions;
E_Axis.majorGridLineStyle = majorGridLineStyle;
E_Axis.preferredNumberOfMajorTicks = MAX_NUMBER_LABEL;
E_Axis.minorTicksPerInterval = 0;
E_Axis.labelOffset = 3.0;
E_Axis.labelPositionY = 11.0;
labelTextStyle.color = [CPTColor colorWithCGColor:E_Color.CGColor];
E_Axis.tickDirection = CPTSignPositive;
E_Axis.labelTextStyle = labelTextStyle;
E_Axis.axisConstraints = [CPTConstraints constraintWithRelativeOffset:1.0];
E_Axis.plotSpace = _ESpace;
CPTXYAxis *F_Axis = [[CPTXYAxis alloc] init] ;
F_Axis.coordinate = CPTCoordinateY;
F_Axis.orthogonalCoordinateDecimal = CPTDecimalFromCGFloat(_FSpace.yRange.locationDouble);
F_Axis.labelingPolicy = CPTAxisLabelingPolicyEqualDivisions;
F_Axis.majorGridLineStyle = majorGridLineStyle;
F_Axis.preferredNumberOfMajorTicks = MAX_NUMBER_LABEL;
F_Axis.minorTicksPerInterval = 0;
F_Axis.labelOffset = 3.0;
F_Axis.labelPositionY = -11.0;
labelTextStyle.color = [CPTColor colorWithCGColor:F_Color.CGColor];
F_Axis.tickDirection = CPTSignPositive;
F_Axis.labelTextStyle = labelTextStyle;
F_Axis.axisConstraints = [CPTConstraints constraintWithRelativeOffset:1.0];
F_Axis.plotSpace = _FSpace;
我已经把3条第一轴线上的左侧（与约束0），另一个在图的右侧。 问题的例子所示，其中最后一个绿色标签是不可见的：提前
http://www.mathnormal.altervista.org/axis.png
感谢。
'labelPositionY'属性做了什么？ –
我编辑了一些库函数'setLabelOffset'。当标签更新时，我向标签点（x，y）添加一个y偏移量。但是问题不在这里，因为我从头开始创建一个项目，使用最初的CorePlot Library（1.2版），问题是一样的。您可以查看下面链接的视频，以获取更多解释：[link]（http://www.youtube.com/watch?v=ACzpSvRaOY8&feature=youtu.be）y范围是[[CPTPlotRange plotRangeWithLocation：CPTDecimalFromCGFloat （10.0）长度：CPTDecimalFromCGFloat（50.0）]' – strstr