我有一个 UIView
,我想用两个圆圈修剪它,就像我 drawn 一样。 (对质量感到抱歉)。
我的代码:
final class TrimmedView: UIView {
override init(frame: CGRect) {
super.init(frame: frame)
let size = CGSize(width: 70, height: 70)
let innerRadius: CGFloat = 366.53658283002471
let innerBottomRadius: CGFloat = 297.88543112651564
let path = UIBezierPath()
path.move(to: CGPoint(x: -innerRadius + (size.width / 2), y: innerRadius))
path.addArc(withCenter: CGPoint(x: size.width / 2, y: innerRadius), radius: innerRadius, startAngle: CGFloat.pi, endAngle: 0, clockwise: true)
path.move(to: CGPoint(x: -innerBottomRadius + (size.width / 2), y: innerBottomRadius))
path.addArc(withCenter: CGPoint(x: size.width / 2, y: innerBottomRadius), radius: innerBottomRadius, startAngle: 0, endAngle: CGFloat.pi, clockwise: true)
path.close()
let shapeLayer = CAShapeLayer()
shapeLayer.path = path.cgPath
shapeLayer.shadowPath = path.cgPath
layer.mask = shapeLayer
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
}
View Controller :
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let view = UIView(frame: CGRect(origin: CGPoint(x: (self.view.bounds.width - 70) / 2, y: (self.view.bounds.height - 70) / 2), size: CGSize(width: 70, height: 70)))
view.backgroundColor = .red
self.view.addSubview(view)
let view1 = TrimmedView(frame: view.frame)
view1.backgroundColor = .yellow
self.view.addSubview(view1)
}
我得到了这个result 。对我来说,顶部修剪有效,但底部无效,我不知道为什么。任何帮助,将不胜感激。谢谢。
最佳答案
这是一个自定义 View ,应该可以满足您的需求。
UIBezierPath
使用 QuadCurves 作为顶部“凸”弧和底部“凹”弧。
它被标记为@IBDesignable
,因此您可以在设计时在 IB/Storyboard 中看到它。弧线的“高度”和填充颜色均设置为 @IBInspectable
,因此您也可以在设计时调整这些值。
要在 Storyboard 中使用它:
- 添加一个普通的
UIView
- 将类更改为
BohdanShapeView
- 在“属性检查器” Pane 中,设置“圆弧偏移”和“填充颜色”
- 将背景颜色设置为普通 View (您可能会使用透明)
结果:
通过代码使用它:
let view1 = BohdanShapeView(frame: view.frame)
view1.fillColor = .systemTeal
view1.arcOffset = 10
self.view.addSubview(view1)
这是类(class):
@IBDesignable
class BohdanShapeView: UIView {
@IBInspectable var arcOffset: CGFloat = 0.0
@IBInspectable var fillColor: UIColor = UIColor.white
let shapeLayer = CAShapeLayer()
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
func commonInit() -> Void {
// add the shape layer
layer.addSublayer(shapeLayer)
}
override func layoutSubviews() {
super.layoutSubviews()
// fill color for the shape
shapeLayer.fillColor = self.fillColor.cgColor
let width = bounds.size.width
let height = bounds.size.height
let bezierPath = UIBezierPath()
// start at arcOffset below top-left
bezierPath.move(to: CGPoint(x: 0.0, y: 0.0 + arcOffset))
// add curve to arcOffset below top-right
bezierPath.addQuadCurve(to: CGPoint(x: width, y: 0.0 + arcOffset), controlPoint: CGPoint(x: width * 0.5, y: 0.0 - arcOffset))
// add line to bottom-right
bezierPath.addLine(to: CGPoint(x: width, y: height))
// add curve to bottom-left
bezierPath.addQuadCurve(to: CGPoint(x: 0.0, y: height), controlPoint: CGPoint(x: width * 0.5, y: height - arcOffset * 2.0))
// close the path
bezierPath.close()
shapeLayer.path = bezierPath.cgPath
}
}
关于ios - 用 2 条弧线修剪 UIView,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58520058/