Ios 核心图和显示y标签

我在用iOS和Core Plot正确显示y轴标签时遇到了一些问题

我将向您展示我目前拥有的两个不同场景，希望有人能帮助我使其中一个正常工作

好的，那么第一个场景： 守则：

// Configure y-axis
CPTAxis *y = axisSet.yAxis;
y.axisLineStyle = axisLineStyle;
y.majorGridLineStyle = customGridStyle;
y.labelingPolicy = CPTAxisLabelingPolicyAutomatic;
y.labelTextStyle = axisTextStyle;
y.majorTickLineStyle = axisLineStyle;
y.majorTickLength = 0.0f;
y.minorTickLength = 0.0f;
y.tickDirection = CPTSignNegative;
NSInteger majorIncrement = [self findStep:(maxValue - minValue)/7];
CGFloat yMax = [self findMaximumValue:maxValue];
NSMutableSet *yLabels = [NSMutableSet set];
NSMutableSet *yMajorLocations = [NSMutableSet set];

int maxLocation = 0;

for (NSInteger j = 0; j <= yMax + majorIncrement; j += majorIncrement) {
    CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:[NSString stringWithFormat:@"%i", j] textStyle:y.labelTextStyle];
    NSDecimal location = CPTDecimalFromInteger(j);
    label.tickLocation = location;
    label.offset = 125;

    if (label) {
        [yLabels addObject:label];
    }

    [yMajorLocations addObject:[NSDecimalNumber decimalNumberWithDecimal:location]];
    if (maxLocation < [[NSDecimalNumber decimalNumberWithDecimal:location] intValue]) {
        maxLocation = [[NSDecimalNumber decimalNumberWithDecimal:location] intValue];
    }
}

y.gridLinesRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInteger(0) length:CPTDecimalFromInteger(maxLocation)];
y.axisLabels = yLabels;
y.majorTickLocations = yMajorLocations;

//配置y轴
CPTAxis*y=axisSet.yAxis；
y、 axisLineStyle=axisLineStyle；
y、 majorGridLineStyle=customGridStyle；
y、 labelingPolicy=CPTAxisLabelingPolicyAutomatic；
y、 labelTextStyle=axisTextStyle；
y、 majorTickLineStyle=axisLineStyle；
y、 majorTickLength=0.0f；
y、 minorTickLength=0.0f；
y、 tickDirection=CPTSignNegative；
NSInteger-majorIncrement=[self-findStep:（maxValue-minValue）/7]；
CGFloat yMax=[self-findMaximumValue:maxValue]；
NSMutableSet*yLabels=[NSMutableSet]；
NSMutableSet*yMajorLocations=[NSMutableSet]；
int maxLocation=0；
对于使用
cptaxislabelingpolicyne
labeling策略的（NSInteger j=0；j），您完全可以控制勾号的位置和标签。由您决定制作多少勾号和标签以及将它们放置在何处

如果您只想更改轴上的数字格式，请保持
cptaxislabelingpolicy自动
标记策略（或除
cptaxislabelingpolicy以外的任何其他策略
），删除创建记号位置和标签的代码，并更改
labelFormatter
。您可以使用任何
NSFormatter
。创建
NSNumberFormatter
，将其配置为显示所需的数字格式，并将其设置为
labelFormatter
属性。
谢谢，Eric！我真的想创建标签使用None策略，我可以更好地控制步骤等，但现在我使用的解决方案是格式化labelFormatter，直到我让另一部分工作得更好…谢谢！
// Configure y-axis
CPTAxis *y = axisSet.yAxis;
y.axisLineStyle = axisLineStyle;
y.majorGridLineStyle = customGridStyle;
y.labelingPolicy = CPTAxisLabelingPolicyNone;
y.labelTextStyle = axisTextStyle;
y.majorTickLineStyle = axisLineStyle;
y.majorTickLength = 0.0f;
y.minorTickLength = 0.0f;
y.tickDirection = CPTSignPositive;
NSInteger majorIncrement = [self findStep:(maxValue - minValue)/7];
CGFloat yMax = [self findMaximumValue:maxValue];
NSMutableSet *yLabels = [NSMutableSet set];
NSMutableSet *yMajorLocations = [NSMutableSet set];

int maxLocation = 0;

for (NSInteger j = 0; j <= yMax + majorIncrement; j += majorIncrement) {
    CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:[NSString stringWithFormat:@"%i", j] textStyle:y.labelTextStyle];
    NSDecimal location = CPTDecimalFromInteger(j);
    label.tickLocation = location;
    label.offset = -25;

    if (label) {
        [yLabels addObject:label];
    }

    [yMajorLocations addObject:[NSDecimalNumber decimalNumberWithDecimal:location]];
    if (maxLocation < [[NSDecimalNumber decimalNumberWithDecimal:location] intValue]) {
        maxLocation = [[NSDecimalNumber decimalNumberWithDecimal:location] intValue];
    }
}

y.gridLinesRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInteger(0) length:CPTDecimalFromInteger(maxLocation)];
y.axisLabels = yLabels;
y.majorTickLocations = yMajorLocations;
x.gridLinesRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInteger(0) length:CPTDecimalFromInteger(maxLocation)];