如何同时向 UIView 添加顶角、顶边框和顶阴影

Question

我需要在 UIView 上添加几种效果，使其左上角和右上角变圆，圆角曲线上有白色边框和深色阴影，如下图所示：

我创建了一个继承自 UIView 的 MSHTablePaneCell class，然后覆盖了它的 drawRect 方法：

static const CGFloat kCornerRadius = 15;
@implementation MSHTablePaneCell ()
- (void)drawRect:(CGRect)rect {
    [super drawRect:rect];

    UIBezierPath *path = [UIBezierPath    bezierPathWithRoundedRect:self.bounds byRoundingCorners:(UIRectCornerTopLeft |UIRectCornerTopRight) cornerRadii:CGSizeMake(kCornerRadius, kCornerRadius)];

    // 1. mask round corner
    CAShapeLayer *roundLayer = [CAShapeLayer layer];
    roundLayer.path = path.CGPath;
    roundLayer.frame = self.bounds;
    //    roundLayer.cornerRadius = 10.0;
    self.layer.mask = roundLayer;

   // 2. add border to round corner curve
   UIBezierPath *topCurvepath = [UIBezierPath bezierPath];
   [topCurvepath moveToPoint:CGPointMake(0, kCornerRadius)];
   [topCurvepath addQuadCurveToPoint:CGPointMake(kCornerRadius, 0) controlPoint:CGPointMake(0, 0)];
   [topCurvepath addLineToPoint:CGPointMake(CGRectGetWidth(self.frame)-kCornerRadius, 0)];
   [topCurvepath addQuadCurveToPoint:CGPointMake(CGRectGetWidth(self.frame), kCornerRadius) controlPoint:CGPointMake(CGRectGetWidth(self.frame), 0)];

   CAShapeLayer *topBorderLayer = [CAShapeLayer layer];
   topBorderLayer.lineWidth = 4.0;
   topBorderLayer.borderColor = [UIColor redColor].CGColor;
   topBorderLayer.path = topCurvepath.CGPath;
   [self.contentView.layer addSublayer:topBorderLayer];
}
@end

然而，通过上面的代码，我得到了如下的最终图片：

无论我设置哪个属性，topCurvePath都显示为黑色背景色，我该如何解决这个问题？提前致谢~

Answer 1

topBorderLayer.fillColor = [UIColor yourColor].CGColor

如何同时向 UIView 添加顶角、顶边框和顶阴影

How to add top corners, top border and top shadow to a UIView at the same time

ios

objective-c

core-graphics

drawrect

rounded-corners