Unity+Vuforia集成现有iOS项目后用户交互失效问题

兄弟，我正在把Unity+Vuforia项目集成到现有iOS项目中，已经成功在ARViewController里显示Unity视图，但现在所有用户交互都挂了——不管是iOS原生的返回按钮，还是Unity里的按钮，触摸事件完全触发不了，急死了！

我的实现代码（Swift） #

import Foundation
class ARViewController: UIViewController {
    var unityView: UIView?
    static func instantiateViewController() -> ARViewController {
        let controller = UIStoryboard.main.instantiateViewController(withIdentifier: "ARViewController") as! ARViewController
        return controller
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
            appDelegate.currentUnityController = UnityAppController()
            appDelegate.currentUnityController?.application(UIApplication.shared, didFinishLaunchingWithOptions: nil)
            appDelegate.startUnity()
            NotificationCenter.default.addObserver(self, selector: #selector(handleUnityReady), name: NSNotification.Name("UnityReady"), object: nil)
        }
    }
    @IBAction func onBackPressed(_ sender: Any) {
        dismiss(animated: true, completion: nil)
    }
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
            appDelegate.stopUnity()
        }
    }
    @objc func backPressedTest() {
    }
    @objc func handleUnityReady() {
        showUnitySubView()
    }
    func showUnitySubView() {
        guard let unityView = UnityGetGLView() else { return }
        self.unityView = unityView
        // 我本来想让Unity视图在原生UI下面，所以直接addSubview了
        view?.addSubview(unityView)
        unityView.translatesAutoresizingMaskIntoConstraints = false
        let views = ["view": unityView]
        let w = NSLayoutConstraint.constraints(withVisualFormat: "|-0-[view]-0-|", options: [], metrics: nil, views: views)
        let h = NSLayoutConstraint.constraints(withVisualFormat: "V:|-50-[view]-0-|", options: [], metrics: nil, views: views)
        view.addConstraints(w + h)
        // 这是我加的原生返回按钮
        let button = UIButton(type: .custom)
        button.setImage(#imageLiteral(resourceName: "ic_back_black").withRenderingMode(.alwaysTemplate), for: .normal)
        button.addTarget(self, action:#selector(backPressed), for: .touchUpInside)
        button.frame = CGRect(x: 0, y: 0, width: 28, height: 60)
        button.widthAnchor.constraint(equalToConstant: button.frame.width).isActive = true
        button.tintColor = UIColor.purpleBrown()
        view?.addSubview(button)
    }
}

具体现象 #

• 蓝色的是我在ARViewController里加的原生按钮，点了没反应
• 绿色栏里的返回按钮是Unity端做的，点了也完全没动静

调试截图 #

界面展示：

调试元素层级：

我帮你排查后的解决方案 #

兄弟，这触摸失效的坑我之前踩过好几次，主要是这几个问题导致的，你挨个试：

1. 原生按钮绑定了不存在的方法！

你代码里给按钮绑定的#selector(backPressed)根本没实现！你的VC里只有onBackPressed和backPressedTest，这直接导致原生按钮点了没反应！赶紧改成：

button.addTarget(self, action:#selector(onBackPressed), for: .touchUpInside)

2. 原生按钮约束不全，位置不对！

你只给按钮加了宽度约束，没设置位置（x/y），还没关translatesAutoresizingMaskIntoConstraints，导致按钮可能不在你看得见的区域！修改按钮代码：

let button = UIButton(type: .custom)
button.setImage(#imageLiteral(resourceName: "ic_back_black").withRenderingMode(.alwaysTemplate), for: .normal)
button.addTarget(self, action:#selector(onBackPressed), for: .touchUpInside)
button.translatesAutoresizingMaskIntoConstraints = false // 必须关掉自动布局
button.tintColor = UIColor.purpleBrown()
view?.addSubview(button)
// 给按钮加位置约束，比如放在左上角安全区
NSLayoutConstraint.activate([
    button.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 16),
    button.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 8),
    button.widthAnchor.constraint(equalToConstant: 28),
    button.heightAnchor.constraint(equalToConstant: 60)
])

3. Unity视图可能禁用了用户交互

Unity的GLView默认有时会把isUserInteractionEnabled设为false，添加视图时强制开启：

func showUnitySubView() {
    guard let unityView = UnityGetGLView() else { return }
    self.unityView = unityView
    unityView.isUserInteractionEnabled = true // 新增这行
    // 原来的添加视图和约束代码...
}

4. 修复Unity与原生的事件传递冲突

Unity的UnityAppController会接管应用事件循环，嵌入原生VC时会拦截触摸事件，在ARViewController里重写hitTest方法确保事件正确分发：

override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
    // 优先响应原生控件
    let hitView = super.hitTest(point, with: event)
    if hitView != nil && hitView != unityView {
        return hitView
    }
    // 点击Unity区域则交给Unity处理
    return unityView
}

5. 检查Unity端Vuforia设置

最后去Unity编辑器确认：

• 打开Vuforia Configuration，确保Enable Input Handling已勾选
• 检查Unity里的按钮是否正确绑定点击事件，有没有被其他UI遮挡

内容的提问来源于stack exchange，提问作者Seto