如何在iOS 7的UINavigationController中禁用向后滑动手势

苹果在iOS 7中添加了新的默认导航行为。您可以从屏幕的左边缘轻扫以返回导航堆栈。但是在我的应用程序中，此行为与我的自定义左侧菜单冲突。因此，是否可以在UINavigationController中禁用此新手势？

我找到了解决方案：

目标C：

if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
    self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}

迅捷3+：
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false

我发现将手势设置为“禁用”并不总是有效。它确实有效，但是对我来说，只有在我使用了手势之后才起作用。第二次它不会触发回退。

对我来说，解决的方法是委派该手势并实现shouldbegin方法以返回NO：

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    // Disable iOS 7 back gesture
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = NO;
        self.navigationController.interactivePopGestureRecognizer.delegate = self;
    }
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];

    // Enable iOS 7 back gesture
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
        self.navigationController.interactivePopGestureRecognizer.delegate = nil;
    }
}

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    return NO;
}

只需从NavigationController中删除手势识别器即可。在iOS 8中工作。

if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)])
    [self.navigationController.view removeGestureRecognizer:self.navigationController.interactivePopGestureRecognizer];

从iOS 8开始，已接受的答案不再有效。我需要停止滑动以消除我的主游戏屏幕上的手势，因此实现了以下目的：

- (void)viewDidAppear:(BOOL)animated
{
     [super viewDidAppear:animated];

if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
    self.navigationController.interactivePopGestureRecognizer.delegate = self;
    }
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
    self.navigationController.interactivePopGestureRecognizer.delegate = nil;
    }

}

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
     return NO;
}

我对Twan的答案做了一些改进，因为：

1. 您的视图控制器可能被设置为其他手势识别器的委托
2. nil当您返回到根视图控制器并在浏览其他位置之前进行滑动手势时，将委托设置为导致挂起问题。

以下示例假定使用iOS 7：

{
    id savedGestureRecognizerDelegate;
}

- (void)viewWillAppear:(BOOL)animated
{
    savedGestureRecognizerDelegate = self.navigationController.interactivePopGestureRecognizer.delegate;
    self.navigationController.interactivePopGestureRecognizer.delegate = self;
}

- (void)viewWillDisappear:(BOOL)animated
{
    self.navigationController.interactivePopGestureRecognizer.delegate = savedGestureRecognizerDelegate;
}

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    if (gestureRecognizer == self.navigationController.interactivePopGestureRecognizer) {
        return NO;
    }
    // add whatever logic you would otherwise have
    return YES;
}

请在root vc中设置：

-(void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:YES];
    self.navigationController.interactivePopGestureRecognizer.enabled = NO;

}

-(void)viewDidDisappear:(BOOL)animated{
    [super viewDidDisappear:YES];
    self.navigationController.interactivePopGestureRecognizer.enabled = YES;
}

对于Swift：

navigationController!.interactivePopGestureRecognizer!.enabled = false

它在ios 10及更高版本中对我有效：

- (void)viewWillAppear:(BOOL)animated {
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = NO;
    }

}

它不适用于viewDidLoad（）方法。

编辑

如果要管理特定导航控制器的向后滑动功能，请考虑使用SwipeBack。

有了这个，你可以设置 navigationController.swipeBackEnabled = NO。

例如：

#import <SwipeBack/SwipeBack.h>

- (void)viewWillAppear:(BOOL)animated
{
    navigationController.swipeBackEnabled = NO;
}

可以通过CocoaPods安装。

pod 'SwipeBack', '~> 1.0'

对于缺乏解释我深表歉意。

我的方法 一个手势识别器将它们全部统治：

class DisabledGestureViewController: UIViewController: UIGestureRecognizerDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()
        navigationController!.interactivePopGestureRecognizer!.delegate = self
    }

    func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {
        // Prevent going back to the previous view
        return !(navigationController!.topViewController is DisabledGestureViewController)
    }
}

重要提示：请勿在导航堆栈中的任何位置重置委托： navigationController!.interactivePopGestureRecognizer!.delegate = nil

这就是Swift 3的方式

为我工作

    self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false

所有这些解决方案都以他们不推荐的方式操纵苹果的手势识别器。一位朋友告诉我，有一个更好的解决方案：

[navigationController.interactivePopGestureRecognizer requireGestureRecognizerToFail: myPanGestureRecognizer];

其中myPanGestureRecognizer是用于例如显示菜单的手势识别器。这样一来，当您按下新的导航控制器时，Apple的手势识别器就不会再被打开，并且您不必依靠hacky的延迟，如果您的手机进入睡眠状态或负载过重，延迟可能会过早触发。

将此留在这里是因为我知道下次需要它时我将不记得了，然后在这里我将提供解决问题的方法。

swift 5，swift 4.2可以使用下面的代码。

// disable
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false
// enable
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = true

给出的答案都没有帮助我解决问题。在这里发布我的答案；可能对某人有帮助

private var popGesture: UIGestureRecognizer?在视图控制器中声明为全局变量。然后在viewDidAppear和viewWillDisappear方法中实现代码

override func viewDidAppear(animated: Bool) {

    super.viewDidAppear(animated)

    if self.navigationController!.respondsToSelector(Selector("interactivePopGestureRecognizer")) {

        self.popGesture = navigationController!.interactivePopGestureRecognizer
        self.navigationController!.view.removeGestureRecognizer(navigationController!.interactivePopGestureRecognizer!)
    }
}


override func viewWillDisappear(animated: Bool) {

    super.viewWillDisappear(animated)

    if self.popGesture != nil {
        navigationController!.view.addGestureRecognizer(self.popGesture!)
    }
}

这将在iOS v8.x及更高版本中禁用向后滑动

这适用于viewDidLoad:iOS 8：

  dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
      self.navigationController.interactivePopGestureRecognizer.enabled = false;
  });

好的帮助可以解决很多问题 dispatch_after。

尽管请注意，此解决方案可能不安全，但请使用您自己的推理。

更新资料

对于iOS 8.1，延迟时间应为0.5秒

在iOS 9.3上，不再需要延迟，只需将其放在您的viewDidLoad：（
如果在iOS 9.0-9.3上可以使用，则为待定）

navigationController?.interactivePopGestureRecognizer?.enabled = false

对于Swift 4，此方法有效：

class MyViewController: UIViewController, UIGestureRecognizerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        self.navigationController?.interactivePopGestureRecognizer?.gesture.delegate = self
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(true)

        self.navigationController?.interactivePopGestureRecognizer?.gesture.isEnabled = false
    }

}

对于大多数视图控制器而言，它对我都有效。

self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false

对于某些视图控制器（如UIPageViewController），它不起作用。在UIPageViewController的pagecontentviewcontroller上，以下代码对我有用。

override func viewDidLoad() {
   self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false
   self.navigationController?.interactivePopGestureRecognizer?.delegate = self
}
override func viewWillDisappear(_ animated: Bool) {
   self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false
   self.navigationController?.interactivePopGestureRecognizer?.delegate = nil
}

在UIGestureRecognizerDelegate上，

func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
   if gestureRecognizer == self.navigationController?.interactivePopGestureRecognizer {
      return false
}
      return true
}