核心繪圖1.2 - CPTAxisLabelingPolicyEqualDivisions，軸有時不顯示最後的標籤

我有一個奇怪的問題，我的coreplot圖。我有六個y軸，他們都有策略「CPTAxisLabelingPolicyEqualDivisions」。圖形可以滾動，軸上的標籤已正確更新。但有時，當我嘗試向下滾動圖表時，特定軸的最後一個標籤消失。核心繪圖1.2 - CPTAxisLabelingPolicyEqualDivisions，軸有時不顯示最後的標籤

這是爲創建所述軸線和相對地塊的代碼，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;

我已經把3條第一軸線上的左側（與約束0），另一個在圖的右側。問題的例子所示，其中最後一個綠色標籤是不可見的：提前

http://www.mathnormal.altervista.org/axis.png

感謝。

來源

2013-05-29 strstr

'labelPositionY'屬性做了什麼？ –

我編輯了一些庫函數'setLabelOffset'。當標籤更新時，我向標籤點（x，y）添加一個y偏移量。但是問題不在這裏，因爲我從頭開始創建一個項目，使用最初的CorePlot Library（1.2版），問題是一樣的。您可以查看下面鏈接的視頻，以獲取更多解釋：[link]（http://www.youtube.com/watch?v=ACzpSvRaOY8&feature=youtu.be）y範圍是[[CPTPlotRange plotRangeWithLocation：CPTDecimalFromCGFloat （10.0）長度：CPTDecimalFromCGFloat（50.0）]' – strstr

這聽起來像它可能是一個錯誤。使用固定間隔標籤策略時，可能會出現某種舍入錯誤。請在Core Plot issue tracker上報告。

來源

2013-05-30 23:43:39

核心繪圖1.2 - CPTAxisLabelingPolicyEqualDivisions，軸有時不顯示最後的標籤

回答

相關問題