如何在iPhone应用程序中图形值的Y轴上显示$ 符号

Question

我有图表显示给定值的百分比符号，但我希望在我的代码中将 $ 更改为 $，但它也隐藏了所有值

     -(void)drawHistogramWithItem:(ECGraphItem *)item index:(int)index color:(UIColor *)color
    {
if (index != 0) 
    _histogramStartX += _histogramSpacing + item.width;
CGRect rect = CGRectMake(_histogramStartX, _xaxisStart.y - _ySpacingScale*item.yValue,item.width, _ySpacingScale*item.yValue);
[color setFill];
[[UIColor blackColor] setStroke];
CGContextAddRect(_context,rect);
CGContextDrawPath(_context, kCGPathFillStroke);
[[UIColor blackColor] set];
NSString *percentage = [NSString stringWithFormat:@"%.1f%%",item.yValue];
[percentage drawAtPoint:CGPointMake(_histogramStartX,_xaxisStart.y - _ySpacingScale*item.yValue - 15) withFont:[UIFont boldSystemFontOfSize:10]];
[self drawWords:item.name AtPoint:CGPointMake(_histogramStartX + item.width/8 ,_xaxisStart.y + 5)  color:[UIColor blackColor]];
    }

Answer 1

只需更改它：

NSString *percentage = [NSString stringWithFormat:@"%.1f%%",item.yValue];

对此：

NSString *percentage = [NSString stringWithFormat:@"%.1f$",item.yValue];

它应该有效。希望对你有帮助