为什么我设置X轴不显示

[zp19900223zp]

NSArray *xVals = @[@"2017-12",@"2018-12",@"2018-12",@"2018-12",@"2018-12",@"2018-12",@"2018-12",@"2018-12",@"2018-12",@"2018-12",@"2018-12",@"2018-12"];
ChartXAxis *xAxis = _chartView.xAxis;
xAxis.labelPosition = XAxisLabelPositionBottom;
xAxis.labelFont = [UIFont systemFontOfSize:10];
xAxis.labelCount = xVals.count;
xAxis.valueFormatter = [[ChartIndexAxisValueFormatter alloc] initWithValues:xVals];
xAxis.gridLineDashLengths = @[@5.0, @5.0];

[zp19900223zp]

使用CocoaPods安装的Charts

[liuxuan30]

ask on stack overflow.

[zp19900223zp]

能具体说明一下吗？

[SoftBoys]

设置X轴数据格式

xAxis.valueFormatter = [JL_DateFormatter new];

实现代理方法

@interface JL_DateFormatter : NSObject <IChartAxisValueFormatter>
@end

@implementation JL_DateFormatter
#pragma mark - IChartAxisValueFormatter
// 返回x轴显示内容
- (NSString *)stringForValue:(double)value axis:(ChartAxisBase *)axis {
    return [[NSDate dateWithTimeIntervalSince1970:value] stringWithFormat:@"MM-dd"];
}
@end