自定义UILable （实现在label中间画线）

自定义UILabel 使其继承UILabel
然后重写drawTextInRect:方法
代码如下：
-(void)drawTextInRect:(CGRect)rect

{

  [super drawTextInRect:rect];

  if(_strikeThroughEnabled)

{

 CGSize textSize=[[self text] sizeWithFont:[self font]];

 CGFloat strikeWidth=textSize.width;

 CGRect lineRect;

 if ([self textAlignment] == NSTextAlignmentRight) 

{

            lineRect = CGRectMake(rect.size.width - strikeWidth, rect.size.height/2, strikeWidth, 1);

  }

else if ([self textAlignment] == NSTextAlignmentCenter) {

            lineRect = CGRectMake(rect.size.width/2 - strikeWidth/2, rect.size.height/2, strikeWidth, 1);

        }

else

{

            lineRect = CGRectMake(0, rect.size.height/2, strikeWidth, 1);

        }

}

 CGContextRef context=UIGraphicsGetCurrentContext();

 if(self.strikelineColor!=nil)

 {

    CGFloat r,g,b,a;

  [self.strikelineColor getRed:&r green:&g blue:&b alpha:&a];

 CGContextSetRGBFillColor(context,r,g,b,a);

 }

CGContextFillRect(context,lineRect);

}

}