Objective c iPhone X系列上的UIBezierPath圆弧和矩形问题，但早期手机上没有

我已经为UIView创建了Objective-C类别来绘制圆角。我正在尝试实现一个Pill按钮，除了在iPhoneX系列上，该功能都可以正常工作。因为圆弧位于UIView的末端，所以我想我必须将视图的其余部分绘制为矩形来填充。如果有更好的方法，我很想知道。下面是函数

- (void)setRounded:(BOOL)clockwise borderColor:(UIColor *)borderColor {
    CGRect rect = self.bounds;

    CGFloat offset = CGRectGetMidY(rect);
    NSAssert(rect.size.width-rect.origin.x >= offset, @"width too small %f < %f", rect.size.width, offset);

    UIBezierPath *maskPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(clockwise?rect.size.width-rect.origin.x-offset:rect.origin.x+offset, offset) radius:offset startAngle:GLKMathDegreesToRadians(270) endAngle:GLKMathDegreesToRadians(90) clockwise:clockwise];
    DLog(@"(clockwise: %@) maskPath: %@", clockwise?@"true":@"false", NSStringFromCGRect([maskPath bounds]));
    [maskPath setUsesEvenOddFillRule:NO];
    UIBezierPath *squarePath = [UIBezierPath bezierPath];

    if (clockwise) {
        [squarePath moveToPoint:CGPointMake(rect.origin.x, rect.origin.y)];
        [squarePath addLineToPoint:CGPointMake(rect.size.width-rect.origin.x-offset, rect.origin.y)];
        [squarePath addLineToPoint:CGPointMake(rect.size.width-rect.origin.x-offset, rect.origin.y+rect.size.height)];
        [squarePath addLineToPoint:CGPointMake(rect.origin.x, rect.origin.y+rect.size.height)];
        [squarePath addLineToPoint:CGPointMake(rect.origin.x, rect.origin.y)];
    } else {        
        [squarePath moveToPoint:CGPointMake(rect.origin.x+offset, rect.origin.y)];
        [squarePath addLineToPoint:CGPointMake(rect.size.width-rect.origin.x, rect.origin.y)];
        [squarePath addLineToPoint:CGPointMake(rect.size.width-rect.origin.x, round(rect.origin.y+rect.size.height))];
        [squarePath addLineToPoint:CGPointMake(rect.origin.x+offset, round(rect.origin.y+rect.size.height))];
        //[squarePath addLineToPoint:CGPointMake(rect.origin.x+offset, rect.origin.y)];
        [squarePath closePath];
    }
    DLog(@"squarePath: %@", NSStringFromCGRect([squarePath bounds]));
    [maskPath appendPath:squarePath];

    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.frame = rect;
    maskLayer.path = maskPath.CGPath;

    self.layer.mask = maskLayer;

    CAShapeLayer *shape = [CAShapeLayer layer];
    shape.frame = self.frame;
    shape.path = maskPath.CGPath;
    shape.lineWidth = 1.0;
    shape.strokeColor = borderColor.CGColor;
    shape.fillColor = borderColor.CGColor;
    [self.layer addSublayer:shape];
}

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我要做的就是把整个药丸形状画成一条路径，然后填充它。以下是一个UIView子类，它将自身绘制为一个药丸形状：

所以你看，这只是一个设置视图大小和比例的问题，不管你在什么设备上运行，药丸都会出现

以下是pill视图的代码：

class PillView : UIView {
    required init?(coder aDecoder: NSCoder) {
        super.init(coder:aDecoder)
        self.isOpaque = false
    }
    override func draw(_ rect: CGRect) {
        let ins : CGFloat = 2
        let r = self.bounds.insetBy(dx: ins, dy: ins)
        let radius : CGFloat = r.size.height / 2
        let d90 = CGFloat.pi/2
        let path = CGMutablePath()
        path.move(to:CGPoint(x:r.maxX - radius, y:ins))
        path.addArc(center:CGPoint(x:radius+ins, y:radius+ins), radius: radius, 
            startAngle: -d90, endAngle: d90, clockwise: true)
        path.addArc(center:CGPoint(x:r.maxX - radius, y:radius+ins), radius: radius, 
            startAngle: d90, endAngle: -d90, clockwise: true)
        path.closeSubpath()
        let bez = UIBezierPath()
        bez.cgPath = path
        UIColor.green.setFill()
        bez.fill()
    }
}

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我不明白你的策略。这条方形小径是干什么用的？你为什么不把整个药丸的形状画成一条路径呢？谢谢，我想我不知道你能做到。我想我发现了真正的问题所在。iPhone X的分辨率更高，但宽度很奇怪，即375。因此，在创建中间标签时，宽度甚至创建了一个带有.5的宽度，但分辨率不正确。我通过计算屏幕宽度为偶数8加上或奇数x的标签来解决这个问题，现在它看起来是正确的。这也是为什么我更喜欢视图自身绘制的解决方案，而您所要做的就是像往常一样使用约束来调整视图的大小/位置。我给出的解决方案不会失败，因为它不依赖于关于分辨率、大小或任何其他方面的任何假设。