这里有很多关于如何使UIView
的圆角化的问题。不幸的是,我找不到有关如何制作带有倾斜角落的内容。我应该如何制作一个corners被削成45度角的UIView
?
如果您能向我展示如何使任意单个角落切成角度,您甚至可以得到额外的(比喻性的)金星。
编辑:参考此链接,其中有一个类似于此解决方案的实现。 我只是不知道需要更改什么。
这里有很多关于如何使UIView
的圆角化的问题。不幸的是,我找不到有关如何制作带有倾斜角落的内容。我应该如何制作一个corners被削成45度角的UIView
?
如果您能向我展示如何使任意单个角落切成角度,您甚至可以得到额外的(比喻性的)金星。
编辑:参考此链接,其中有一个类似于此解决方案的实现。 我只是不知道需要更改什么。
首先,您需要一个带有斜角的路径:
- (CGPathRef) makeAnglePathWithRect: (CGRect)rect withSize:(float) s {
CGPoint one = CGPointMake( rect.origin.x +s, rect.origin.y);
CGPoint two = CGPointMake( rect.origin.x + rect.size.width - s, rect.origin.y);
CGPoint three = CGPointMake( rect.origin.x + rect.size.width, rect.origin.y +s);
CGPoint four = CGPointMake( rect.origin.x + rect.size.width, rect.origin.y + rect.size.height -s);
CGPoint five = CGPointMake( rect.origin.x + rect.size.width-s, rect.origin.y + rect.size.height);
CGPoint six = CGPointMake(rect.origin.x+s, rect.origin.y + rect.size.height);
CGPoint seven = CGPointMake(rect.origin.x, rect.origin.y + rect.size.height-s);
CGPoint eight = CGPointMake(rect.origin.x, rect.origin.y + s);
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path,NULL,one.x, one.y);
CGPathAddLineToPoint(path,NULL,two.x, two.y);
CGPathAddLineToPoint(path,NULL,three.x, three.y);
CGPathAddLineToPoint(path,NULL,four.x, four.y);
CGPathAddLineToPoint(path,NULL,five.x, five.y);
CGPathAddLineToPoint(path,NULL,six.x, six.y);
CGPathAddLineToPoint(path,NULL,seven.x, seven.y);
CGPathAddLineToPoint(path,NULL,eight.x, eight.y);
CGPathAddLineToPoint(path,NULL,one.x, one.y);
return path;
}
接下来需要使用路径来指定一个掩码:
CAShapeLayer *maskLayer = [CAShapeLayer layer];
CGRect bounds = CGRectMake(0.0f, 0.0f, 100, 100); //figure out your bounds
[maskLayer setFrame:bounds];
CGPathRef p = [self makeAnglePathWithRect:bounds withSize:20.0];
maskLayer.path = p;
_myview.layer.mask = maskLayer;
如果您想从任何一个角落中去除角度,请操作点1-8,删除“s”值。您可以使用大小参数更改从角落中切出的三角形的大小。
extension UIView {
public enum Corner: Int {
case TopRight
case TopLeft
case BottomRight
case BottomLeft
case All
}
public func blendCorner(corner corner: Corner, length: CGFloat = 20.0) {
let maskLayer = CAShapeLayer()
var path: CGPathRef?
switch corner {
case .All:
path = self.makeAnglePathWithRect(self.bounds, topLeftSize: length, topRightSize: length, bottomLeftSize: length, bottomRightSize: length)
case .TopRight:
path = self.makeAnglePathWithRect(self.bounds, topLeftSize: 0.0, topRightSize: length, bottomLeftSize: 0.0, bottomRightSize: 0.0)
case .TopLeft:
path = self.makeAnglePathWithRect(self.bounds, topLeftSize: length, topRightSize: 0.0, bottomLeftSize: 0.0, bottomRightSize: 0.0)
case .BottomRight:
path = self.makeAnglePathWithRect(self.bounds, topLeftSize: 0.0, topRightSize: 0.0, bottomLeftSize: 0.0, bottomRightSize: length)
case .BottomLeft:
path = self.makeAnglePathWithRect(self.bounds, topLeftSize: 0.0, topRightSize: 0.0, bottomLeftSize: length, bottomRightSize: 0.0)
}
maskLayer.path = path
self.layer.mask = maskLayer
}
private func makeAnglePathWithRect(rect: CGRect, topLeftSize tl: CGFloat, topRightSize tr: CGFloat, bottomLeftSize bl: CGFloat, bottomRightSize br: CGFloat) -> CGPathRef {
var points = [CGPoint]()
points.append(CGPointMake(rect.origin.x + tl, rect.origin.y))
points.append(CGPointMake(rect.origin.x + rect.size.width - tr, rect.origin.y))
points.append(CGPointMake(rect.origin.x + rect.size.width, rect.origin.y + tr))
points.append(CGPointMake(rect.origin.x + rect.size.width, rect.origin.y + rect.size.height - br))
points.append(CGPointMake(rect.origin.x + rect.size.width - br, rect.origin.y + rect.size.height))
points.append(CGPointMake(rect.origin.x + bl, rect.origin.y + rect.size.height))
points.append(CGPointMake(rect.origin.x, rect.origin.y + rect.size.height - bl))
points.append(CGPointMake(rect.origin.x, rect.origin.y + tl))
let path = CGPathCreateMutable()
CGPathMoveToPoint(path, nil, points.first!.x, points.first!.y)
for point in points {
if point != points.first {
CGPathAddLineToPoint(path, nil, point.x, point.y)
}
}
CGPathAddLineToPoint(path, nil, points.first!.x, points.first!.y)
return path
}
}
这样,您可以轻松地混合您的角落:
let view = UIView()
view.blendCorner(corner: .TopRight)
// or view.blendCorner(corner: .All)
这里是一种实现方法。假设有:
const CGFloat kRadius = 20.0; //'radius' of the corner clip
并且在您的视图中有以下属性:
@property (nonatomic,strong) CAShapeLayer *maskLayer;
您可以设置一个简单的遮罩层,带有斜角连接线(非常容易实现您想要的45度角):
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.lineWidth = kRadius * 2.0;
maskLayer.lineJoin = kCALineJoinBevel;
maskLayer.strokeColor = [[UIColor blackColor] CGColor];
self.layer.mask = self.maskLayer = maskLayer;
在适当的时间(例如在您的-[ViewClass layoutSublayersOfLayer:]
方法中),只需将您的遮罩层路径设置为由半径插入的矩形路径:
self.maskLayer.path = CGPathCreateWithRect(CGRectInset(self.bounds,kRadius,kRadius), NULL);
这是一种不必手动绘制路径的方法。您基本上是使用斜角线连接来完成这部分工作。
CGContext*()
函数编程绘制透明像素。 - user529758