CorePLot中有多个绘图空间的难点

Question

我有几张图可以相互绘制，我需要它们共享一个x轴的时间，但有不同的Y轴......为此，我知道我有创建到第n图中的第2个新的占地空间，并添加这些情节空格图：

这里是我的“新图添加到图”函数的代码段

BOOL isNew=FALSE; 
CPTXYPlotSpace *defaultPlotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace; 
CPTXYPlotSpace *plotSpace=nil; 
if([g_Data count]==1){ 
    plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace; 
    NSLog(@"Reuse existing plot space"); 
} 
else 
{ 
    NSLog(@"New plot space"); 
    plotSpace = [[CPTXYPlotSpace alloc] init]; 
    isNew=TRUE; 
} 

[dataDictionary setObject:plotSpace forKey:@"plotspace"]; 



float xSize=[mainGraphView bounds].size.width; 
float ySize=[mainGraphView bounds].size.height; 

float XRatio=(xSize-50.0)/xSize; 
float YRatio=(ySize-50.0)/ySize; 

NSDecimalNumber *plotWidth=[x_max decimalNumberBySubtracting:x_min]; 
plotWidth=[plotWidth decimalNumberByDividingBy:[NSDecimalNumber decimalNumberWithString:[NSString stringWithFormat:@"%0.2f",XRatio]]]; 
NSDecimalNumber *plotX=[x_min decimalNumberBySubtracting:[plotWidth decimalNumberBySubtracting:[x_max decimalNumberBySubtracting:x_min]]]; 

NSDecimalNumber *plotHeight=[y_max decimalNumberBySubtracting:y_min]; 
plotHeight=[plotHeight decimalNumberByDividingBy:[NSDecimalNumber decimalNumberWithString:[NSString stringWithFormat:@"%0.2f",YRatio]]]; 
NSDecimalNumber *plotY=[y_min decimalNumberBySubtracting:[plotHeight decimalNumberBySubtracting:[y_max decimalNumberBySubtracting:y_min]]]; 




NSLog(@"%@: XRange: Original: %@ x %0.2f becomes %@",identifier,[x_max decimalNumberBySubtracting:x_min],XRatio,plotWidth); 
NSLog(@"%@: YRange: %@-%@ is %@ x %0.2f becomes %@",identifier,y_min,y_max,[y_max decimalNumberBySubtracting:y_min],YRatio,plotHeight); 

if(isNew){ 
    plotSpace.xRange = defaultPlotSpace.xRange; 
} 
else 
{ 
    plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:[plotX decimalValue] length:[plotWidth decimalValue]]; 
} 
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:[plotY decimalValue] 
               length:[plotHeight decimalValue]]; 
NSLog(@"**********YPLOT IS FROM %@ len %@",plotY,plotHeight); 



plotSpace.allowsUserInteraction=TRUE; 
if(isNew)[graph addPlotSpace:plotSpace]; 



CPTScatterPlot *newPlot = [[CPTScatterPlot alloc] initWithFrame:graph.bounds]; 
newPlot.identifier  = identifier; 
newPlot.dataSource =  self; 



CPTMutableLineStyle *lineStyle = [newPlot.dataLineStyle mutableCopy]; 
lineStyle.lineWidth    = 2.0; 
lineStyle.lineColor    = graphColor; 
newPlot.dataLineStyle = lineStyle; 
[g_Plots addObject:newPlot]; 

[graph addPlot:newPlot toPlotSpace:plotSpace]; 



NSLog(@"Adding plot to graph system"); 
[graph addPlot:newPlot]; 




and my log: 



    2013-10-28 15:24:35.166 BodyMetrics[2234:303] -------[NEW PLOT FOR Pulse (bpm)]----------------------------------------------------------- 
    2013-10-28 15:24:35.169 BodyMetrics[2234:303] 85 rows for data: BM_Measure measuredate measuretype = 'Heart Pulse' 
    2013-10-28 15:24:35.173 BodyMetrics[2234:303] The size of the arrays for x and y are: 85;85 
    2013-10-28 15:24:35.173 BodyMetrics[2234:303] XMIN: 1380566085 XMAX: 1382980783 
    2013-10-28 15:24:35.173 BodyMetrics[2234:303] YMIN: 43 YMAX: 154 
    2013-10-28 15:24:35.173 BodyMetrics[2234:303] Reuse existing plot space 
    2013-10-28 15:24:35.174 BodyMetrics[2234:303] Pulse (bpm): XRange: Original: 2414698 x 0.95 becomes 2541787.36842105263157894736842105263157 
    2013-10-28 15:24:35.174 BodyMetrics[2234:303] Pulse (bpm): YRange: 43-154 is 111 x 0.90 becomes 123.333333333333333333333333333333333333 
    2013-10-28 15:24:35.174 BodyMetrics[2234:303] **********YPLOT IS FROM 30.666666666666666666666666666666666667 len 123.333333333333333333333333333333333333 
    2013-10-28 15:24:35.175 BodyMetrics[2234:303] Adding plot to graph system 
    2013-10-28 15:24:35.176 BodyMetrics[2234:303] Added... 1 
    2013-10-28 15:24:35.176 BodyMetrics[2234:303] Configure axes 
    2013-10-28 15:24:35.177 BodyMetrics[2234:303] Now addign Y axes... 
    2013-10-28 15:24:35.177 BodyMetrics[2234:303] Creating axis for Pulse (bpm) 
    2013-10-28 15:24:35.177 BodyMetrics[2234:303] Reusing the existing Y Axis... 
    2013-10-28 15:24:35.178 BodyMetrics[2234:303] This axes is from 43 to 154 being a range of 111 so the major ticks will bat 10.3 floats away, for an interval length of 10.7766990291262135922330097087378640776 
    2013-10-28 15:24:35.178 BodyMetrics[2234:303] About to add the following axes: 2 (
     "<<<CPTXYAxis: 0x10040ca80> bounds: {{0, 0}, {959, 515}}> with range: <<CPTPlotRange: 0x60800027cc40> {1380438995.6315789473684210526315789474, 2541787.36842105263157894736842105263157}> viewCoordinates: {0, 50} to {959, 50}>", 
     "<<<CPTXYAxis: 0x10040d8f0> bounds: {{0, 0}, {959, 515}}> with range: <<CPTPlotRange: 0x60800027cd00> {30.666666666666666666666666666666666667, 123.333333333333333333333333333333333333}> viewCoordinates: {50, 0} to {50, 515}>" 
    ) 
    2013-10-28 15:24:35.179 BodyMetrics[2234:303] Added 
    2013-10-28 15:24:35.179 BodyMetrics[2234:303] -------[NEW PLOT FOR Weight (Kg)]----------------------------------------------------------- 
    2013-10-28 15:24:35.181 BodyMetrics[2234:303] 44 rows for data: BM_Measure measuredate measuretype = 'Weight' 
    2013-10-28 15:24:35.183 BodyMetrics[2234:303] The size of the arrays for x and y are: 44;44 
    2013-10-28 15:24:35.183 BodyMetrics[2234:303] XMIN: 1380330622 XMAX: 1382957809 
    2013-10-28 15:24:35.183 BodyMetrics[2234:303] YMIN: 83.225 YMAX: 85.701 
    2013-10-28 15:24:35.183 BodyMetrics[2234:303] New plot space 
    2013-10-28 15:24:35.183 BodyMetrics[2234:303] Weight (Kg): XRange: Original: 2627187 x 0.95 becomes 2765460 
    2013-10-28 15:24:35.184 BodyMetrics[2234:303] Weight (Kg): YRange: 83.225-85.701 is 2.476 x 0.90 becomes 2.75111111111111111111111111111111111111 
    2013-10-28 15:24:35.184 BodyMetrics[2234:303] **********YPLOT IS FROM 82.9498888888888888888888888888889 len 2.75111111111111111111111111111111111111 
    2013-10-28 15:24:35.184 BodyMetrics[2234:303] Adding plot to graph system 
    2013-10-28 15:24:35.184 BodyMetrics[2234:303] Added... 2 
    2013-10-28 15:24:35.185 BodyMetrics[2234:303] Configure axes 
    2013-10-28 15:24:35.185 BodyMetrics[2234:303] Now addign Y axes... 
    2013-10-28 15:24:35.185 BodyMetrics[2234:303] Creating axis for Pulse (bpm) 
    2013-10-28 15:24:35.185 BodyMetrics[2234:303] Reusing the existing Y Axis... 
    2013-10-28 15:24:35.185 BodyMetrics[2234:303] This axes is from 43 to 154 being a range of 111 so the major ticks will bat 10.3 floats away, for an interval length of 10.7766990291262135922330097087378640776 
    2013-10-28 15:24:35.186 BodyMetrics[2234:303] Creating axis for Weight (Kg) 
    2013-10-28 15:24:35.186 BodyMetrics[2234:303] Adding a new Y axis... 
    2013-10-28 15:24:35.186 BodyMetrics[2234:303] This axes is from 83.225 to 85.701 being a range of 2.476 so the major ticks will bat 10.3 floats away, for an interval length of 0.240388349514563106796116504854368932038 
    2013-10-28 15:24:35.187 BodyMetrics[2234:303] About to add the following axes: 2 (
     "<<<CPTXYAxis: 0x10040ca80> bounds: {{0, 0}, {959, 515}}> with range: <<CPTPlotRange: 0x60800027cc40> {1380438995.6315789473684210526315789474, 2541787.36842105263157894736842105263157}> viewCoordinates: {0, 50} to {959, 50}>", 
     "<<<CPTXYAxis: 0x10040d8f0> bounds: {{0, 0}, {959, 515}}> with range: <<CPTPlotRange: 0x60800027cd00> {30.666666666666666666666666666666666667, 123.333333333333333333333333333333333333}> viewCoordinates: {50, 0} to {50, 515}>" 
    ) 
    2013-10-28 15:24:35.187 BodyMetrics[2234:303] Added 

但是我的图表不能正确缩放：

Answer 1

您将图添加到图两次，首先与[graph addPlot:newPlot toPlotSpace:plotSpace];，再与[graph addPlot:newPlot];。第二次调用将绘图移回为第一个绘图配置的默认绘图空间。

删除多余的电话到-addPlot:。