隐藏系统导航栏手势失效解决方案

在iOS开发中通常会做的隐藏状态栏或者自定义返回按钮,相应的pop手势也失效了，下面就需要解决下这个问题。

navigationBar.isHidden = true

self.navigationItem.leftBarButtonItem = 自定义返回按钮;

解决方案:
我们在自定义导航控制器里我们自己的手势

class NavigationController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        navigationBar.isHidden = true
        
        setupEdgeGesture()
    }
    
    func setupEdgeGesture()  {
        
        guard let targets = interactivePopGestureRecognizer!.value(forKey:  "_targets") as? [NSObject] else { return }
        let targetObjc = targets[0]
        let target = targetObjc.value(forKey: "target")
        let action = Selector(("handleNavigationTransition:"))
        
        //UIPanGestureRecognizer   全屏手势
        //UIScreenEdgePanGestureRecognizer   边缘手势
        let panGes = UIScreenEdgePanGestureRecognizer(target: target, action: action)
        panGes.delegate = self;

        view.addGestureRecognizer(panGes)
    }
}

//如果需要监听手势
extension NavigationController: UIGestureRecognizerDelegate {
    
    func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
        
        if let transitioning = value(forKey: "_isTransitioning") as? Bool {
            if transitioning {return false}
        }
        
        
        return viewControllers.count > 1
    }
    
}

这样就可以有效的解决返回pop手势失效问题

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