我正在尝试为我的轴标签格式化"k"形式的长数字.例如; 如果我有10000,我希望它显示为10k.
我已经尝试过这个答案.但我无法获得格式化的数字.我还需要做什么?请指导我.谢谢.
编辑:
HumanReadableFormatter.h
@interface HumanReadableFormatter : NSNumberFormatter @end
HumanReadableFormatter.m
我修改了上面链接中的代码以满足我的要求.
#import "HumanReadableFormatter.h" @implementation HumanReadableFormatter static const char sUnits[] = { '\0', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' }; static int sMaxUnits = sizeof sUnits - 1; -(NSString *) stringForObjectValue:(id)obj { int multiplier = 1000; int exponent = 0; double bytes = [(NSNumber *)obj doubleValue]; while ((bytes >= multiplier) && (exponent < sMaxUnits)) { bytes /= multiplier; exponent++; } return [NSString stringWithFormat:@"%@ %c", [super stringFromNumber: [NSNumber numberWithDouble: bytes]], sUnits[exponent]]; } @end
图形代码:
if(!rightY) rightY = [[CPTXYAxis alloc]init]; rightY.labelingPolicy = CPTAxisLabelingPolicyAutomatic; rightY.orthogonalCoordinateDecimal = CPTDecimalFromFloat(totIntervalShown); rightY.axisConstraints = [CPTConstraints constraintWithUpperOffset:-40]; rightY.coordinate = CPTCoordinateY; rightY.majorTickLength = 0; rightY.minorTickLength = 0; rightY.tickDirection = CPTSignNone; rightY.plotSpace = barPlotSpace; NSNumberFormatter *numFormatter; if(lowerLock < 1000) //if value is < 1000, normally format it { numFormatter = [[NSNumberFormatter alloc] init]; [numFormatter setNumberStyle: NSNumberFormatterDecimalStyle]; numFormatter.maximumFractionDigits = 2; numFormatter.minimumFractionDigits = 2; } else //for > 1000, format in human readable form { numFormatter = [[HumanReadableFormatter alloc] init]; //what i need to do here more? } rightY.labelFormatter = numFormatter; //formatted as shown on right side on graph
嵌套循环:
我正在发布解决方案,以防将来有人需要它.感谢@Eric帮助我.
HumanReadableFormatter.h
@interface HumanReadableFormatter : NSNumberFormatter { NSNumberFormatter *numberFormatter; } @end
HumanReadableFormatter.m
@implementation HumanReadableFormatter static const char sUnits[] = { '\0', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' }; static int sMaxUnits = sizeof sUnits - 1; -(id)init { if(self = [super init]) { numberFormatter = [[NSNumberFormatter alloc] init]; [numberFormatter setNumberStyle: NSNumberFormatterDecimalStyle]; numberFormatter.maximumFractionDigits = 1; numberFormatter.minimumFractionDigits = 1; } return self; } -(NSString *) stringForObjectValue:(id)obj { int multiplier = 1000; int exponent = 0; double bytes = [(NSNumber *)obj doubleValue]; while ((bytes >= multiplier) && (exponent < sMaxUnits)) { bytes /= multiplier; exponent++; } NSString *convertedStr = [NSString stringWithFormat:@"%@ %c", [numberFormatter stringFromNumber: [NSNumber numberWithDouble: bytes]], sUnits[exponent]]; return convertedStr; } @end
要在图表中使用,您需要2行代码:
HumanReadableFormatter *formatter = [[HumanReadableFormatter alloc] init]; YAxis.labelFormatter = formatter;