Hello all, I tried to add arc for UIBezierPath I could not able to get the exact curve,
here is my code here I have added the bezier path for the added curve from the center position.
@IBDesignable
class MyTabBar: UITabBar {
private var shapeLayer: CALayer?
private func addShape() {
let shapeLayer = CAShapeLayer()
shapeLayer.path = createPath()
shapeLayer.strokeColor = UIColor.lightGray.cgColor
shapeLayer.fillColor = UIColor.white.cgColor
shapeLayer.lineWidth = 1.0
//The below 4 lines are for shadow above the bar. you can skip them if you do not want a shadow
shapeLayer.shadowOffset = CGSize(width:0, height:0)
shapeLayer.shadowRadius = 10
shapeLayer.shadowColor = UIColor.gray.cgColor
shapeLayer.shadowOpacity = 0.3
if let oldShapeLayer = self.shapeLayer {
self.layer.replaceSublayer(oldShapeLayer, with: shapeLayer)
} else {
self.layer.insertSublayer(shapeLayer, at: 0)
}
self.shapeLayer = shapeLayer
}
override func draw(_ rect: CGRect) {
self.addShape()
}
func createPath() -> CGPath {
let height: CGFloat = 37.0
let path = UIBezierPath()
let centerWidth = self.frame.width / 2
path.move(to: CGPoint(x: 0, y: 0)) // start top left
path.addLine(to: CGPoint(x: (centerWidth - height * 2), y: 0)) // the beginning of the trough
path.addCurve(to: CGPoint(x: centerWidth, y: height),
controlPoint1: CGPoint(x: (centerWidth - 30), y: 0), controlPoint2: CGPoint(x: centerWidth - 35, y: height))
path.addCurve(to: CGPoint(x: (centerWidth + height * 2), y: 0),
controlPoint1: CGPoint(x: centerWidth + 35, y: height), controlPoint2: CGPoint(x: (centerWidth + 30), y: 0))
path.addLine(to: CGPoint(x: self.frame.width, y: 0))
path.addLine(to: CGPoint(x: self.frame.width, y: self.frame.height))
path.addLine(to: CGPoint(x: 0, y: self.frame.height))
path.close()
return path.cgPath
}
override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
guard !clipsToBounds && !isHidden && alpha > 0 else { return nil }
for member in subviews.reversed() {
let subPoint = member.convert(point, from: self)
guard let result = member.hitTest(subPoint, with: event) else { continue }
return result
}
return nil
}
}
this is tab bar controller added plus button in center view center, and the when tap the plus button to add the curve based popup should show, I don't know how to add curve based popup.
class TabbarViewController: UITabBarController,UITabBarControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
self.navigationController?.navigationBar.isHidden = true
setupMiddleButton()
}
// TabBarButton – Setup Middle Button
func setupMiddleButton() {
let middleBtn = UIButton(frame: CGRect(x: (self.view.bounds.width / 2)-25, y: -20, width: 50, height: 50))
middleBtn.setImage(UIImage(named: "PlusBtn"), for: .normal)
self.tabBar.addSubview(middleBtn)
middleBtn.addTarget(self, action: #selector(self.menuButtonAction), for: .touchUpInside)
self.view.layoutIfNeeded()
}
// Menu Button Touch Action
@objc func menuButtonAction(sender: UIButton) {
//show the popUp
}
}
Please share me the findings & share me your refreance Thanks
New edit:
I created a general-purpose method that will generate polygons with a mixture of sharp and rounded corners of different radii. I used it to create a project with a look rather like what you are after. You can download it from Github:
https://github.com/DuncanMC/CustomTabBarController.git
Here's what it looks like:
Note that the area of the tab's view controller that extends into the tab bar controller does not get taps. If you try to tap there, it triggers the tab bar controller. You will have to do some more tinkering to get that part to work.
Ultimately you may have to create a custom UITabBar (or UITabBar-like component) and possibly a custom parent view controller that acts like a UITabBar, in order to get what you want.
The method that creates polygon paths is called
buildPolygonPathFrom(points:defaultCornerRadius:)It takes an array of PolygonPoint structs. Those are defined like this:
The code to build the path for the custom tab bar looks like this:
Previous answer:
I just tried it, and it is possible to subclass UITabBar. I created a subclass of UITabBar where I use a mask layer to cut a circular "notch" out of the top of the tab bar. The code is below. It looks like the screenshot below. It isn't quite what you're after, but it's a start:
(The background color for the "Page 1" view controller is set to light gray, and you can see that color showing through in the "notch" I cut out of the tab bar.)
Edit:
To draw your popover view you'll need to create a filled path that shape. You'll have to construct a custom shape like that with a combination of lines and arcs. I suggest using a CGMutablePath and the method
addArc(tangent1End:tangent2End:radius:transform:)since that enables you to provide endpoints rather than angles.Edit #2:
Another part of the puzzle:
Here is a custom UIView subclass that masks itself in the shape you're after
Combined with the modified tab bar from above, it looks like the image below. The final task is to get the custom view sized and positioned correctly, and have it land on top of the tab bar.