打开sketch的iOS原件库。发现cell分割线的css是这样的:

box-shadow: inset 0 0 0 0 #C8C7CC;

为了简单,可以设置uiview高度为0.5像素,颜色为#C8C7CC

也可以在drawRect里绘制:

- (void)drawRect:(CGRect)rect{
    [super drawRect:rect];    
    [self drawLineX:0 rect:rect color:[UIColor sg_colorWithHex:0xC8C7CC]];    
}

- (void)drawLineX:(CGFloat)x rect:(CGRect)rect color:(UIColor *)color{
    [self drawLineX:x length:rect.size.width-x*2 rect:rect color:color];
}

- (void)drawLineX:(CGFloat)x length:(CGFloat)w  rect:(CGRect)rect color:(UIColor *)color{
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [UIColor clearColor].CGColor);
    CGContextFillRect(context, rect);
    CGContextSetStrokeColorWithColor(context,color.CGColor);
    CGContextStrokeRect(context, CGRectMake(x, rect.size.height, w, 1));
    [self.subviews[0] setBackgroundColor:[UIColor clearColor]];
}