如何在UIImageView底部应用曲线? [英] How to apply Curve at bottom of UIImageView?
问题描述
我想屏蔽并在图像视图底部添加一些曲线。我试过下面的代码。
扩展名UIImage {
var roundedImage:UIImage {
let rect = CGRect (origin:CGPoint(x:0,y:0),size:self.size)
UIGraphicsBeginImageContextWithOptions(self.size,false,1)
UIBezierPath(
roundedRect:rect,
cornerRadius:self.size.height
).addClip()
self.draw(in:rect)
返回UIGraphicsGetImageFromCurrentImageContext()!
}
}
但没有获得成功。
让我把UI放在这里,我想在屏幕上显示。
让我知道如何在swift中显示UIImageView上面的屏幕截图。
我在Android中发现了一些完整的东西,但在iOS中没有。
链接:
对于任何类型的视图,添加 curvedPercent
参数
func pathCurvedForView(givenView:UIView,curvedPercent:CGFloat) - > UIBezierPath
{
let arrowPath = UIBezierPath()
arrowPath.move(to:CGPoint(x:0,y:0))
arrowPath.addLine(to:CGPoint(x:givenView。 bounds.size.width,y:0))
arrowPath.addLine(to:CGPoint(x:givenView.bounds.size.width,y:givenView.bounds.size.height))
arrowPath。 addQuadCurve(to:CGPoint(x:0,y:givenView.bounds.size.height),controlPoint:CGPoint(x:givenView.bounds.size.width / 2,y:givenView.bounds.size.height-givenView.bounds .size.height * curvedPercent))
arrowPath.addLine(to:CGPoint(x:0,y:0))
arrowPath.close()
return arrowPath
}
func applyCurvedPath(givenView:UIView,curvedPercent:CGFloat){
guard curvedPercent& lt; = 1&& curvedPercent> = 0 else {
return
}
let shapeLayer = CAShapeLayer(layer:givenView.layer)
shapeLayer.path = self.pathCurvedForView(givenView: givenView,curvedPercent:curvedPercent).cgPath
shapeLayer.frame = givenView.bounds
shapeLayer.masksToBounds = true
givenView.layer.mask = shapeLayer
}
我该如何使用?
self.applyCurvedPath(givenView:self.customView,curvedPercent:0.5)
结果 curvedPercent = 0.5
结果 curvedPercent = 0.1
的结果curvedPercent = 0.9
UPDATE
对于倒置曲线,用此替换原始 pathCurvedForView
方法
func pathCurvedForView(givenView:UIView,curvedPercent:CGFloat) - > UIBezierPath
{
let arrowPath = UIBezierPath()
arrowPath.move(to:CGPoint(x:0,y:0))
arrowPath.addLine(to:CGPoint(x:givenView.bounds.size.width,y:0))
arrowPath.addLine(to:CGPoint(x:givenView.bounds.size.width,y:givenView.bounds.size.height - (givenView.bounds.size.height * curvedPercent)))
arrowPath.addQuadCurve(to :CGPoint(x:0,y:givenView.bounds.size.height - (givenView.bounds.size.height * curvedP) ercent)),controlPoint:CGPoint(x:givenView.bounds.size.width / 2,y:givenView.bounds.size.height))
arrowPath.addLine(to:CGPoint(x:0,y:0) ))
arrowPath.close()
返回arrowPath
}
结果
I want to mask and add some curve at bottom of image view. i have try below code .
extension UIImage{
var roundedImage: UIImage {
let rect = CGRect(origin:CGPoint(x: 0, y: 0), size: self.size)
UIGraphicsBeginImageContextWithOptions(self.size, false, 1)
UIBezierPath(
roundedRect: rect,
cornerRadius: self.size.height
).addClip()
self.draw(in: rect)
return UIGraphicsGetImageFromCurrentImageContext()!
}
}
But not getting success. Let me put UI here that i want to show in screen.
Let me know how to show UIImageView Like above screen shots in swift.
I have found some use full thing in android but not in iOS.
Link : Crescento View
As I said in my comment you need to make your own UIBezierPath
adding a quad curve in the bottom part of your path, the curvedPercent
will be how pronounced your curve will be, you can adjust it as you need it
Custom UIImageView class
@IBDesignable
class CurvedUIImageView: UIImageView {
private func pathCurvedForView(givenView: UIView, curvedPercent:CGFloat) ->UIBezierPath
{
let arrowPath = UIBezierPath()
arrowPath.move(to: CGPoint(x:0, y:0))
arrowPath.addLine(to: CGPoint(x:givenView.bounds.size.width, y:0))
arrowPath.addLine(to: CGPoint(x:givenView.bounds.size.width, y:givenView.bounds.size.height))
arrowPath.addQuadCurve(to: CGPoint(x:0, y:givenView.bounds.size.height), controlPoint: CGPoint(x:givenView.bounds.size.width/2, y:givenView.bounds.size.height-givenView.bounds.size.height*curvedPercent))
arrowPath.addLine(to: CGPoint(x:0, y:0))
arrowPath.close()
return arrowPath
}
@IBInspectable var curvedPercent : CGFloat = 0{
didSet{
guard curvedPercent <= 1 && curvedPercent >= 0 else{
return
}
let shapeLayer = CAShapeLayer(layer: self.layer)
shapeLayer.path = self.pathCurvedForView(givenView: self,curvedPercent: curvedPercent).cgPath
shapeLayer.frame = self.bounds
shapeLayer.masksToBounds = true
self.layer.mask = shapeLayer
}
}
}
Result in Storyboard as is Designable
For any kind of View, added curvedPercent
parameter
func pathCurvedForView(givenView: UIView, curvedPercent:CGFloat) ->UIBezierPath
{
let arrowPath = UIBezierPath()
arrowPath.move(to: CGPoint(x:0, y:0))
arrowPath.addLine(to: CGPoint(x:givenView.bounds.size.width, y:0))
arrowPath.addLine(to: CGPoint(x:givenView.bounds.size.width, y:givenView.bounds.size.height))
arrowPath.addQuadCurve(to: CGPoint(x:0, y:givenView.bounds.size.height), controlPoint: CGPoint(x:givenView.bounds.size.width/2, y:givenView.bounds.size.height-givenView.bounds.size.height*curvedPercent))
arrowPath.addLine(to: CGPoint(x:0, y:0))
arrowPath.close()
return arrowPath
}
func applyCurvedPath(givenView: UIView,curvedPercent:CGFloat) {
guard curvedPercent <= 1 && curvedPercent >= 0 else{
return
}
let shapeLayer = CAShapeLayer(layer: givenView.layer)
shapeLayer.path = self.pathCurvedForView(givenView: givenView,curvedPercent: curvedPercent).cgPath
shapeLayer.frame = givenView.bounds
shapeLayer.masksToBounds = true
givenView.layer.mask = shapeLayer
}
How can I use it?
self.applyCurvedPath(givenView: self.customView,curvedPercent: 0.5)
Result for curvedPercent = 0.5
Result for curvedPercent = 0.1
Result for curvedPercent = 0.9
UPDATE
For inverted curve replace original pathCurvedForView
method by this one
func pathCurvedForView(givenView: UIView, curvedPercent:CGFloat) ->UIBezierPath
{
let arrowPath = UIBezierPath()
arrowPath.move(to: CGPoint(x:0, y:0))
arrowPath.addLine(to: CGPoint(x:givenView.bounds.size.width, y:0))
arrowPath.addLine(to: CGPoint(x:givenView.bounds.size.width, y:givenView.bounds.size.height - (givenView.bounds.size.height*curvedPercent)))
arrowPath.addQuadCurve(to: CGPoint(x:0, y:givenView.bounds.size.height - (givenView.bounds.size.height*curvedPercent)), controlPoint: CGPoint(x:givenView.bounds.size.width/2, y:givenView.bounds.size.height))
arrowPath.addLine(to: CGPoint(x:0, y:0))
arrowPath.close()
return arrowPath
}
Result
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