如何在iphone应用程序中在图形值的y轴上显示$符号

我有一个图表，显示给定的百分比登录值，但我希望代码中的$改为$，但它也隐藏了所有的值

     -(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]];
    }

只要改变这一点：

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

为此：

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

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它应该会起作用。希望有帮助

您是否尝试过此

NSString*percentage=[NSString stringWithFormat:@“%.1f$”，item.yValue]或<代码>NSString*百分比=[NSString stringWithFormat:@“$%.1f”，item.yValue]