标签栏视图和底部弹出窗口中的曲线不起作用？
curve in tabbar view and bottom popup not working?
Hello all, I tried to add arc for UIBezierPath I could not able to get the exact curve,
这里是我的代码，我已经为从中心位置添加的曲线添加了贝塞尔曲线路径。
@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
}
}
这是在中心视图中心添加加号按钮的标签栏控制器，当点击加号按钮添加基于曲线的弹出窗口时应该显示，我不知道如何添加基于曲线的弹出窗口。
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
}
}
请分享我的发现并分享你的评论
谢谢
新编辑：
我创建了一个 general-purpose 方法，该方法将生成混合了不同半径的尖角和圆角的多边形。我用它来创建一个看起来很像你所追求的项目。您可以从 Github:
下载
https://github.com/DuncanMC/CustomTabBarController.git
这是它的样子：
请注意，选项卡视图控制器中延伸到选项卡栏控制器中的区域不会被点击。如果您尝试点击那里，它会触发标签栏控制器。您将不得不做更多的修补才能使该部分正常工作。
最终，您可能必须创建一个自定义 UITabBar（或 UITabBar-like 组件），并且可能还需要创建一个像 UITabBar 一样的自定义父视图控制器，才能获得您想要的内容。
创建多边形路径的方法叫做buildPolygonPathFrom(points:defaultCornerRadius:)
它接受一个 PolygonPoint 结构数组。这些定义如下：
/// A struct describing a single vertex in a polygon. Used in building polygon paths with a mixture of rounded an sharp-edged vertexes.
public struct PolygonPoint {
let point: CGPoint
let isRounded: Bool
let customCornerRadius: CGFloat?
init(point: CGPoint, isRounded: Bool, customCornerRadius: CGFloat? = nil) {
self.point = point
self.isRounded = isRounded
self.customCornerRadius = customCornerRadius
}
init(previousPoint: PolygonPoint, isRounded: Bool) {
self.init(point: previousPoint.point, isRounded: isRounded, customCornerRadius: previousPoint.customCornerRadius)
}
}
构建自定义标签栏路径的代码如下所示：
func tabBarMaskPath() -> CGPath? {
let width = bounds.width
let height = bounds.height
guard width > 0 && height > 0 else { return nil }
let dentRadius: CGFloat = 35
let cornerRadius: CGFloat = 20
let topFlatPartWidth = (width - dentRadius * 2.0) / 2
let polygonPoints = [
PolygonPoint(point: CGPoint(x: 0, y: 0), // Point 0
isRounded: true,
customCornerRadius: cornerRadius),
PolygonPoint(point: CGPoint(x: 0, y: height), // Point 1
isRounded: false),
PolygonPoint(point: CGPoint(x: width, y: height), // Point 2
isRounded: false),
PolygonPoint(point: CGPoint(x: width, y: 0), // Point 3
isRounded: true,
customCornerRadius: cornerRadius),
PolygonPoint(point: CGPoint(x: topFlatPartWidth + dentRadius * 2, y: 0), // Point 4
isRounded: true,
customCornerRadius: cornerRadius),
PolygonPoint(point: CGPoint(x: topFlatPartWidth + dentRadius * 2, y: dentRadius + cornerRadius), // Point 5
isRounded: true,
customCornerRadius: dentRadius),
PolygonPoint(point: CGPoint(x: topFlatPartWidth , y: dentRadius + cornerRadius), // Point 6
isRounded: true,
customCornerRadius: dentRadius),
PolygonPoint(point: CGPoint(x: topFlatPartWidth , y: 0), // Point 7
isRounded: true,
customCornerRadius: cornerRadius),
]
return buildPolygonPathFrom(points: polygonPoints, defaultCornerRadius: 0)
}
上一个回答：
我刚刚试过了，可以继承UITabBar。我创建了 UITabBar 的一个子类，我在其中使用遮罩层从选项卡栏的顶部切出一个圆形“槽口”。代码如下。它看起来像下面的屏幕截图。这不是您想要的，但这是一个开始：
（“Page 1”视图控制器的背景颜色设置为浅灰色，您可以在我从标签栏中切出的“缺口”中看到这种颜色。）
//
// CustomTabBar.swift
// TabBarController
//
// Created by Duncan Champney on 3/31/21.
//
import UIKit
class CustomTabBar: UITabBar {
var maskLayer = CAShapeLayer()
override var frame: CGRect {
didSet {
configureMaskLayer()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
configureMaskLayer()
self.layer.mask = maskLayer
self.layer.borderWidth = 0
}
required init?(coder: NSCoder) {
super.init(coder: coder)
configureMaskLayer()
self.layer.mask = maskLayer
}
func configureMaskLayer() {
let rect = layer.bounds
maskLayer.frame = rect
let circleBoxSize = rect.size.height * 1.25
maskLayer.fillRule = .evenOdd
let path = UIBezierPath(rect: rect)
let circleRect = CGRect(x: rect.size.width/2 - circleBoxSize / 2,
y: -circleBoxSize/2,
width: circleBoxSize,
height: circleBoxSize)
let circle = UIBezierPath.init(ovalIn: circleRect)
path.append(circle)
maskLayer.path = path.cgPath
maskLayer.fillColor = UIColor.white.cgColor // Any opaque color works and has no effect
}
}
编辑：
要绘制弹出视图，您需要创建一个该形状的填充路径。您必须使用直线和圆弧的组合来构建自定义形状。我建议使用 CGMutablePath 和方法 addArc(tangent1End:tangent2End:radius:transform:)，因为这使您能够提供端点而不是角度。
编辑#2：
谜题的另一部分：
这是一个自定义的 UIView 子类，它以您想要的形状隐藏自己
//
// ShapeWithTabView.swift
// ShapeWithTab
//
// Created by Duncan Champney on 4/1/21.
//
import UIKit
class ShapeWithTabView: UIView {
var cornerRadius: CGFloat = 20
var tabRadius: CGFloat = 60
var tabExtent: CGFloat = 0
var shapeLayer = CAShapeLayer()
var maskLayer = CAShapeLayer()
func buildShapeLayerPath() -> CGPath {
let boxWidth = min(bounds.size.width - 40, 686)
let boxHeight = min(bounds.size.height - 40 - tabRadius * 2 - tabExtent, 832)
// These are the corners of the view's primary rectangle
let point1 = CGPoint(x: 0, y: boxHeight)
let point2 = CGPoint(x: 0, y: 0)
let point3 = CGPoint(x: boxWidth, y: 0)
let point4 = CGPoint(x: boxWidth, y: boxHeight)
// These are the corners of the "tab" that extends outside the view's normal bounds.
let tabPoint1 = CGPoint(x: boxWidth / 2 + tabRadius, y: boxHeight)
let tabPoint2 = CGPoint(x: boxWidth / 2 + tabRadius, y: boxHeight + tabExtent + tabRadius * 2 )
let tabPoint3 = CGPoint(x: boxWidth / 2 - tabRadius, y: boxHeight + tabExtent + tabRadius * 2)
let tabPoint4 = CGPoint(x: boxWidth / 2 - tabRadius , y: boxHeight)
let path = CGMutablePath()
path.move(to: CGPoint(x: 0, y: boxHeight - cornerRadius))
path.addArc(tangent1End: point2,
tangent2End: point3,
radius: cornerRadius)
path.addArc(tangent1End: point3,
tangent2End: point4,
radius: cornerRadius)
path.addArc(tangent1End: point4,
tangent2End: point1,
radius: cornerRadius)
//
path.addArc(tangent1End: tabPoint1,
tangent2End: tabPoint2,
radius: tabRadius)
path.addArc(tangent1End: tabPoint2,
tangent2End: tabPoint3,
radius: tabRadius)
path.addArc(tangent1End: tabPoint3,
tangent2End: tabPoint4,
radius: tabRadius)
path.addArc(tangent1End: tabPoint4,
tangent2End: point1,
radius: tabRadius)
path.addArc(tangent1End: point1,
tangent2End: point2,
radius: cornerRadius)
return path
}
func doInitSetup() {
self.layer.addSublayer(shapeLayer)
self.layer.mask = maskLayer
backgroundColor = .lightGray
//Configure a shape layer to draw an outline
shapeLayer.fillColor = UIColor.clear.cgColor
shapeLayer.strokeColor = UIColor.blue.cgColor
shapeLayer.lineWidth = 2
//Configure a mask layer to mask the view to our custom shape
maskLayer.fillColor = UIColor.white.cgColor
maskLayer.strokeColor = UIColor.white.cgColor
maskLayer.lineWidth = 2
}
override init(frame: CGRect) {
super.init(frame: frame)
self.doInitSetup()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
self.doInitSetup()
}
public func updateShapeLayerPath() {
let path = buildShapeLayerPath()
shapeLayer.path = path
maskLayer.path = path
}
override var frame: CGRect {
didSet {
print("New frame = \(frame)")
shapeLayer.frame = layer.bounds
}
}
}
结合上面修改后的标签栏，如下图所示。最后的任务是正确调整自定义视图的大小和位置，并将其放置在选项卡栏的顶部。
Hello all, I tried to add arc for UIBezierPath I could not able to get the exact curve,
这里是我的代码，我已经为从中心位置添加的曲线添加了贝塞尔曲线路径。
@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
}
}
这是在中心视图中心添加加号按钮的标签栏控制器，当点击加号按钮添加基于曲线的弹出窗口时应该显示，我不知道如何添加基于曲线的弹出窗口。
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
}
}
请分享我的发现并分享你的评论 谢谢
新编辑：
我创建了一个 general-purpose 方法，该方法将生成混合了不同半径的尖角和圆角的多边形。我用它来创建一个看起来很像你所追求的项目。您可以从 Github:
下载https://github.com/DuncanMC/CustomTabBarController.git
这是它的样子：
请注意，选项卡视图控制器中延伸到选项卡栏控制器中的区域不会被点击。如果您尝试点击那里，它会触发标签栏控制器。您将不得不做更多的修补才能使该部分正常工作。
最终，您可能必须创建一个自定义 UITabBar（或 UITabBar-like 组件），并且可能还需要创建一个像 UITabBar 一样的自定义父视图控制器，才能获得您想要的内容。
创建多边形路径的方法叫做buildPolygonPathFrom(points:defaultCornerRadius:)
它接受一个 PolygonPoint 结构数组。这些定义如下：
/// A struct describing a single vertex in a polygon. Used in building polygon paths with a mixture of rounded an sharp-edged vertexes.
public struct PolygonPoint {
let point: CGPoint
let isRounded: Bool
let customCornerRadius: CGFloat?
init(point: CGPoint, isRounded: Bool, customCornerRadius: CGFloat? = nil) {
self.point = point
self.isRounded = isRounded
self.customCornerRadius = customCornerRadius
}
init(previousPoint: PolygonPoint, isRounded: Bool) {
self.init(point: previousPoint.point, isRounded: isRounded, customCornerRadius: previousPoint.customCornerRadius)
}
}
构建自定义标签栏路径的代码如下所示：
func tabBarMaskPath() -> CGPath? {
let width = bounds.width
let height = bounds.height
guard width > 0 && height > 0 else { return nil }
let dentRadius: CGFloat = 35
let cornerRadius: CGFloat = 20
let topFlatPartWidth = (width - dentRadius * 2.0) / 2
let polygonPoints = [
PolygonPoint(point: CGPoint(x: 0, y: 0), // Point 0
isRounded: true,
customCornerRadius: cornerRadius),
PolygonPoint(point: CGPoint(x: 0, y: height), // Point 1
isRounded: false),
PolygonPoint(point: CGPoint(x: width, y: height), // Point 2
isRounded: false),
PolygonPoint(point: CGPoint(x: width, y: 0), // Point 3
isRounded: true,
customCornerRadius: cornerRadius),
PolygonPoint(point: CGPoint(x: topFlatPartWidth + dentRadius * 2, y: 0), // Point 4
isRounded: true,
customCornerRadius: cornerRadius),
PolygonPoint(point: CGPoint(x: topFlatPartWidth + dentRadius * 2, y: dentRadius + cornerRadius), // Point 5
isRounded: true,
customCornerRadius: dentRadius),
PolygonPoint(point: CGPoint(x: topFlatPartWidth , y: dentRadius + cornerRadius), // Point 6
isRounded: true,
customCornerRadius: dentRadius),
PolygonPoint(point: CGPoint(x: topFlatPartWidth , y: 0), // Point 7
isRounded: true,
customCornerRadius: cornerRadius),
]
return buildPolygonPathFrom(points: polygonPoints, defaultCornerRadius: 0)
}
上一个回答：
我刚刚试过了，可以继承UITabBar。我创建了 UITabBar 的一个子类，我在其中使用遮罩层从选项卡栏的顶部切出一个圆形“槽口”。代码如下。它看起来像下面的屏幕截图。这不是您想要的，但这是一个开始：
（“Page 1”视图控制器的背景颜色设置为浅灰色，您可以在我从标签栏中切出的“缺口”中看到这种颜色。）
//
// CustomTabBar.swift
// TabBarController
//
// Created by Duncan Champney on 3/31/21.
//
import UIKit
class CustomTabBar: UITabBar {
var maskLayer = CAShapeLayer()
override var frame: CGRect {
didSet {
configureMaskLayer()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
configureMaskLayer()
self.layer.mask = maskLayer
self.layer.borderWidth = 0
}
required init?(coder: NSCoder) {
super.init(coder: coder)
configureMaskLayer()
self.layer.mask = maskLayer
}
func configureMaskLayer() {
let rect = layer.bounds
maskLayer.frame = rect
let circleBoxSize = rect.size.height * 1.25
maskLayer.fillRule = .evenOdd
let path = UIBezierPath(rect: rect)
let circleRect = CGRect(x: rect.size.width/2 - circleBoxSize / 2,
y: -circleBoxSize/2,
width: circleBoxSize,
height: circleBoxSize)
let circle = UIBezierPath.init(ovalIn: circleRect)
path.append(circle)
maskLayer.path = path.cgPath
maskLayer.fillColor = UIColor.white.cgColor // Any opaque color works and has no effect
}
}
编辑：
要绘制弹出视图，您需要创建一个该形状的填充路径。您必须使用直线和圆弧的组合来构建自定义形状。我建议使用 CGMutablePath 和方法 addArc(tangent1End:tangent2End:radius:transform:)，因为这使您能够提供端点而不是角度。
编辑#2：
谜题的另一部分：
这是一个自定义的 UIView 子类，它以您想要的形状隐藏自己
//
// ShapeWithTabView.swift
// ShapeWithTab
//
// Created by Duncan Champney on 4/1/21.
//
import UIKit
class ShapeWithTabView: UIView {
var cornerRadius: CGFloat = 20
var tabRadius: CGFloat = 60
var tabExtent: CGFloat = 0
var shapeLayer = CAShapeLayer()
var maskLayer = CAShapeLayer()
func buildShapeLayerPath() -> CGPath {
let boxWidth = min(bounds.size.width - 40, 686)
let boxHeight = min(bounds.size.height - 40 - tabRadius * 2 - tabExtent, 832)
// These are the corners of the view's primary rectangle
let point1 = CGPoint(x: 0, y: boxHeight)
let point2 = CGPoint(x: 0, y: 0)
let point3 = CGPoint(x: boxWidth, y: 0)
let point4 = CGPoint(x: boxWidth, y: boxHeight)
// These are the corners of the "tab" that extends outside the view's normal bounds.
let tabPoint1 = CGPoint(x: boxWidth / 2 + tabRadius, y: boxHeight)
let tabPoint2 = CGPoint(x: boxWidth / 2 + tabRadius, y: boxHeight + tabExtent + tabRadius * 2 )
let tabPoint3 = CGPoint(x: boxWidth / 2 - tabRadius, y: boxHeight + tabExtent + tabRadius * 2)
let tabPoint4 = CGPoint(x: boxWidth / 2 - tabRadius , y: boxHeight)
let path = CGMutablePath()
path.move(to: CGPoint(x: 0, y: boxHeight - cornerRadius))
path.addArc(tangent1End: point2,
tangent2End: point3,
radius: cornerRadius)
path.addArc(tangent1End: point3,
tangent2End: point4,
radius: cornerRadius)
path.addArc(tangent1End: point4,
tangent2End: point1,
radius: cornerRadius)
//
path.addArc(tangent1End: tabPoint1,
tangent2End: tabPoint2,
radius: tabRadius)
path.addArc(tangent1End: tabPoint2,
tangent2End: tabPoint3,
radius: tabRadius)
path.addArc(tangent1End: tabPoint3,
tangent2End: tabPoint4,
radius: tabRadius)
path.addArc(tangent1End: tabPoint4,
tangent2End: point1,
radius: tabRadius)
path.addArc(tangent1End: point1,
tangent2End: point2,
radius: cornerRadius)
return path
}
func doInitSetup() {
self.layer.addSublayer(shapeLayer)
self.layer.mask = maskLayer
backgroundColor = .lightGray
//Configure a shape layer to draw an outline
shapeLayer.fillColor = UIColor.clear.cgColor
shapeLayer.strokeColor = UIColor.blue.cgColor
shapeLayer.lineWidth = 2
//Configure a mask layer to mask the view to our custom shape
maskLayer.fillColor = UIColor.white.cgColor
maskLayer.strokeColor = UIColor.white.cgColor
maskLayer.lineWidth = 2
}
override init(frame: CGRect) {
super.init(frame: frame)
self.doInitSetup()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
self.doInitSetup()
}
public func updateShapeLayerPath() {
let path = buildShapeLayerPath()
shapeLayer.path = path
maskLayer.path = path
}
override var frame: CGRect {
didSet {
print("New frame = \(frame)")
shapeLayer.frame = layer.bounds
}
}
}
结合上面修改后的标签栏，如下图所示。最后的任务是正确调整自定义视图的大小和位置，并将其放置在选项卡栏的顶部。