Core-Plot - preferredNumberOfMajorTicks不限制Ticks的数量

Question

我想在Y轴上只绘制10个Majors Ticks.为此,我正在使用方法preferredNumberOfMajorTicks = 10.

但正如屏幕截图所示,它并没有真正起作用......

这是我对y轴的配置:

    CPTXYAxis *y = axisSet.yAxis;
y.labelingPolicy = CPTAxisLabelingPolicyFixedInterval;
//y.majorIntervalLength = CPTDecimalFromDouble(2);
y.preferredNumberOfMajorTicks = 10;
y.minorTicksPerInterval = 5;
y.tickDirection = CPTSignNone;
y.majorTickLineStyle = majorLineStyle;
y.minorTickLineStyle = minorLineStyle;
y.axisLineStyle = majorLineStyle;
y.majorTickLength = 7.0;
y.minorTickLength = 5.0;
y.labelTextStyle = whiteTextStyle;
y.minorTickLabelTextStyle = minorTickBlackTextStyle;
y.titleTextStyle = whiteTextStyle;

y.axisConstraints = [CPTConstraints constraintWithLowerOffset:40.0];

有些东西应该超过正确的方法,preferredNumberOfMajorTicks = 10但我看不出是什么......

Answer 1

该preferredNumberOfMajorTicks属性不适用于固定间隔标签政策.有关详细信息,请参阅Core Plot文档.你有两个选择:

1. 保留固定间隔标签策略并将其更改为majorIntervalLength将提供所需滴答数的值.

2. 将标签政策更改为CPTAxisLabelingPolicyAutomatic或CPTAxisLabelingPolicyEqualDivisions.