example.gif

需求:

指定按钮, 或者区域的镂空处理, 点击镂空区域响应底部视图的事件
效果如上gif动画

封装代码:

//
//  GuideView.swift
//  TestView
//
//  Created by cpcoder on 24/8/2023.
//

import UIKit

enum GuideType {
    case cycle // 圆
    case roundedRect // 矩形
}

class GuideView: UIView {
    
    fileprivate let rect: CGRect
    
    fileprivate let cornerPath: UIBezierPath
    
    /// 镂空区域的准确frame
    /// - Parameter rect: CGRect
    init(rect: CGRect, type: GuideType) {
        self.rect = rect
        switch type {
        case .cycle:
            // 圆心坐标
            let centerPoint = CGPoint(x: rect.minX + rect.width / 2,
                                      y: rect.minY + rect.height / 2)
            // 圆半径
            let radius = rect.width / 2
            
            // 圆形镂空路径
            self.cornerPath = UIBezierPath(arcCenter: centerPoint,
                                           radius: radius,
                                           startAngle: 0,
                                           endAngle: 2 * CGFloat.pi,
                                           clockwise: false)
        case .roundedRect:
            // 这里是一个圆角矩形镂空
            self.cornerPath = UIBezierPath(roundedRect: rect, cornerRadius: 10)
        }
        super.init(frame: .zero)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    func show() {
        let frame = UIScreen.main.bounds
        self.frame = frame
        self.backgroundColor = UIColor.black.withAlphaComponent(0.7)
        guard
            let delegate = UIApplication.shared.delegate as? AppDelegate,
            let window = delegate.window
        else {
            return
        }
        // 这里也可以添加到指定的View上, 比如某个控制器的view上
        window.addSubview(self)
        
        // 也可以在这里添加一些文字说明的空间, 或者手指动画
//        let uiTipsLb = UILabel(frame: CGRect(x: rect.minX, y: rect.maxY, width: 100, height: 50))
//        uiTipsLb.text = "提示文案 或者 图像"
//        uiTipsLb.textColor = .white
//        addSubview(uiTipsLb)
        
        // 添加圆角镂空矩形路径
        let path = UIBezierPath(rect: frame)
        path.append(cornerPath)
        
        let shapeLayer = CAShapeLayer()
        shapeLayer.path = path.cgPath
        shapeLayer.fillRule = .evenOdd
        layer.mask = shapeLayer
    }
    
    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        if cornerPath.contains(point) {
            // 镂空区域点击事件穿透
            removeFromSuperview()
            return nil
        } else {
            return super.hitTest(point, with: event)
        }
    }
}

调用:

//
//  TestController.swift
//  TestView
//
//  Created by cpcoder on 28/8/2023.
//

import UIKit

class TestController: UIViewController {

    @IBOutlet weak var uiAddBtn: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    // 添加按钮事件
    @IBAction func addAction(_ sender: Any) {
        print("addAction")
    }
    
    /// 点击Cycle按钮, 展示圆形镂空区域
    /// - Parameter sender:
    @IBAction func cycleAction(_ sender: Any) {
        // 之所以写延迟, 是因为
        // 往往我们需要引导的场景是, 进入页面, 1. viewWillAppear(切换页面多次调用); 2. viewDidAppear(切换页面多次调用) 3.viewDidLoad(调用一次)
        // 如果 写在 viewDidLoad 那么极有可能获取不到准确的frame
        // 为了只展示一次, 且得到准确的frame, 所以写延迟
        // 当然, 也可以写在 1 & 2 中, 那么 你就要额外的变量去标记是否已经展示过镂空引导, 从而解决多次展示问题
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: {
            // 获取uiAddBtn转换到self.view之后的确切的frame
            let rect = self.uiAddBtn.convert(self.uiAddBtn.bounds, to: self.view)
            GuideView(rect: rect, type: .cycle).show()
        })
    }
    
    /// 点击圆角矩形按钮, 展示圆角矩形镂空区域
    /// - Parameter sender:
    @IBAction func RoundedRectAction(_ sender: Any) {
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: {
            // 获取uiAddBtn转换到self.view之后的确切的frame
            let rect = self.uiAddBtn.convert(self.uiAddBtn.bounds, to: self.view)
            GuideView(rect: rect, type: .roundedRect).show()
        })
    }
}

这些年经历过几次这样的镂空引导, 但还是忘, 记下来

ycj1z-vfmd2.gif