为所有 VC 自定义 header UIView？

Question

我正在尝试为项目中的所有 ViewControllers 创建自定义 header 文件。下图是实际设计。

所以我正在尝试使用 Xib 文件创建自定义视图，如下所示：

import UIKit

class HamburgrView: UIView {
    override init(frame: CGRect) {
        // 1. setup any properties here
        // 2. call super.init(frame:)
        super.init(frame: frame)
        // 3. Setup view from .xib file
        xibSetup()
    }
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        xibSetup()
    }
    override open func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        xibSetup()
    }
    override func layoutSubviews() {

    }
    func xibSetup() {

       let  tempView = loadViewFromNib()
        // use bounds not frame or it'll be offset
        tempView.frame = bounds
        // Make the view stretch with containing view
        tempView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        // Adding custom subview on top of our view (over any custom drawing > see note below)
        addSubview(tempView)

    }

    func loadViewFromNib() -> UIView {
        let bundle = Bundle(for: type(of:self))
        let nib = UINib(nibName: "HamburgrView", bundle: bundle)

        // Assumes UIView is top level and only object in CustomView.xib file
        let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
        return view
    }


}

我们不知道如何用曲线绘制汉堡包菜单图标及其起始位置 SafeArealayoutGuide。

我尝试了一个 x 位置为负 -40 的视图，并给了 cornerRadius 不像上图那样完美的曲线。

输出看起来不太好。

我的ViewController代码：

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        let hamView = HamburgrView(frame: .zero)
        self.view.addSubview(hamView)
        hamView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            hamView.topAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.topAnchor, constant: 0),
            hamView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 0),
            hamView.widthAnchor.constraint(equalToConstant: 120),
            hamView.heightAnchor.constraint(equalToConstant:  80)
            ])
    }

作为@sandip 的回答，我做了如下更改：

func xibSetup() {

       let  tempView = loadViewFromNib()
        // use bounds not frame or it'll be offset
        tempView.frame = bounds
        // Make the view stretch with containing view
        tempView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        // Adding custom subview on top of our view (over any custom drawing > see note below)
        addSubview(tempView)
        let layer = CAShapeLayer()
        layer.path = UIBezierPath.init(arcCenter: CGPoint(x: 0, y: self.center.y), radius: 50, startAngle: -1.5708, endAngle: 1.5708, clockwise: true).cgPath
        layer.fillColor = UIColor.red.cgColor
        self.layer.addSublayer(layer)
    }

输出如下所示：

任何想法将不胜感激。

Answer 1

这是你想要的吗？

您可以使用 CAShapeLayer 和 UIBezierPath

轻松实现

    let layer = CAShapeLayer()
    layer.path = UIBezierPath.init(arcCenter: CGPoint(x: 0, y: self.view.center.y), radius: 30, startAngle: -1.5708, endAngle: 1.5708, clockwise: true).cgPath
    layer.fillColor = UIColor.red.cgColor
    view.layer.addSublayer(layer)

在您的代码中将圆弧中心更改为 x 为零，将 y 更改为汉堡包视图的垂直中心并将其添加到 self.view

希望对您有所帮助

编辑 1：

由于 OP 在更新答案的评论中要求提供完整代码

class HamburgrView: UIView {
    override init(frame: CGRect) {
        // 1. setup any properties here
        // 2. call super.init(frame:)
        super.init(frame: frame)
        // 3. Setup view from .xib file
        xibSetup()
    }
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        xibSetup()
    }
    override open func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        xibSetup()
    }
    override func layoutSubviews() {

    }
    func xibSetup() {

       let  tempView = loadViewFromNib()
        // use bounds not frame or it'll be offset
        tempView.frame = bounds
        // Make the view stretch with containing view
        tempView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        // Adding custom subview on top of our view (over any custom drawing > see note below)
        addSubview(tempView)

    }

    func loadViewFromNib() -> UIView {
        let bundle = Bundle(for: type(of:self))
        let nib = UINib(nibName: "HamburgrView", bundle: bundle)

        // Assumes UIView is top level and only object in CustomView.xib file
        let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
        return view
    }

    override func didMoveToSuperview() {
        super.didMoveToSuperview()
        let layer = CAShapeLayer()
        layer.path = UIBezierPath.init(arcCenter: CGPoint(x: 0, y: 40), radius: 50, startAngle: -1.5708, endAngle: 1.5708, clockwise: true).cgPath
        layer.fillColor = UIColor.red.cgColor
        self.layer.addSublayer(layer)
    }
}

编辑 2：

OP 弧线出现在汉堡包视图之外的原因是因为弧线中心错误

从 self.view.center.y 更改为 CGPoint(x: 0, y: 40) 应该可以解决问题。更新了代码以反映相同的内容

为什么是 40？

因为 OP 将汉堡视图的高度设置为 80。所以 80/2 = 40

为什么我们不能使用bounds.size.height / 2或self.view.center.y？

因为在 didMoveToSuperview 中 OP 的约束尚未启动，所以它在 xib 中采用高度视图，我认为它不是 80，所以它使用该值设置圆弧中心，但随后你的约束将高度更改为 80。

这是最后的 O/P:

为所有 VC 自定义 header UIView？

custom header UIView to all the VC?

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uiview

custom-view

swift5