如何使圆角的图像，将其与BezierPath

Question

拉我有一个的tableView细胞，具有图像视图。 对于该视图我创建的UIImage延伸，其中我正在与bezierPath 2矩形绘制，然后，从该图我作出的图像。

class func drawTwoRectangles(_ frameOne: CGRect, frameTwo: CGRect, frameColor: UIColor) -> UIImage { 

    UIGraphicsBeginImageContext(CGSize(width: frameOne.size.width, height: frameOne.size.height)) 
    let context = UIGraphicsGetCurrentContext() 

    UIColor(red: 0/255.0, green: 153/255.0, blue: 216/255.0, alpha: 1.0).setFill() 

    let bpath:UIBezierPath = UIBezierPath(roundedRect:CGRect(origin: CGPoint(x:1, y:1), size: CGSize(width: frameOne.size.width - 2, height: frameOne.size.height - 2)), byRoundingCorners: [.allCorners], cornerRadii: CGSize(width: 5, height: 5)) 
    bpath.lineCapStyle = .round 
    bpath.lineJoinStyle = .round 

    bpath.close() 
    bpath.fill() 


    UIColor.white.setFill() 
    UIColor.white.setStroke() 

    let bpathTwo:UIBezierPath = UIBezierPath(rect: frameTwo) 
    bpathTwo.close() 
    bpathTwo.fill() 
    bpathTwo.stroke() 

    frameColor.setStroke() 

    let bpathThree:UIBezierPath = UIBezierPath(roundedRect: CGRect(origin: CGPoint(x:1, y:1), size: CGSize(width: frameOne.size.width - 2, height: frameOne.size.height - 2)), cornerRadius: 5) 
    bpathThree.lineWidth = 2 
    bpathThree.close() 

    bpathThree.stroke() 

    bpath.append(bpathTwo) 
    bpath.append(bpathThree) 

    context?.addPath(bpath.cgPath) 
    let image = UIGraphicsGetImageFromCurrentImageContext() 
    UIGraphicsEndImageContext() 

    return image! 
} 

所以，当我设置的图像转换为图像视图，边角不光滑，它们是模糊的：

请您咨询，如何处理呢？ 在此先感谢！与此

UIGraphicsBeginImageContext(CGSize(width: frameOne.size.width, height: frameOne.size.height)) 

：

Answer 1

尝试更换此

UIGraphicsBeginImageContextWithOptions(frameOne.size, false, UIScreen.main.scale) 

顺便说一句，你可以通过0.0作为第三个参数，根据documentation：

规模应用于位图的因素。如果您指定的值为0.0，则缩放系数将设置为设备主屏幕的缩放系数。