objective-c - 請問如何停用目前控制器的側邊右滑pop手勢？當前VC是push過來的

Question

如題：我的跟控制器是是個導航控制器，現在有一個A控制器是我push過來的，我希望這個控制器只能點擊導航條左邊的返回按鈕來pop，而側邊右滑動的手勢pop我希望能把它禁用掉。當然其他控制器我希望不還是有這個pop的手勢。請問我改如何實現呢？

Answer 1

在 A 控制器裡寫：

<code class="objc">- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    self.navigationController.interactivePopGestureRecognizer.delegate = self;
}

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

    self.navigationController.interactivePopGestureRecognizer.delegate = nil;
}

// 给该控制器添加协议 <UIGestureRecognizerDelegate>

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    return gestureRecognizer != self.navigationController.interactivePopGestureRecognizer;
}
</code>

Answer 2

建設從 A -> B 優雅一點的話

在 B 的 viewDidLoad 裡面

<code>self.navigationController.interactivePopGestureRecognizer.delegate = self;</code>

<code>- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {
    [super pushViewController:viewController animated:animated];
    self.interactivePopGestureRecognizer.enabled = NO;
}</code>

然後在 viewDidDisappear 裡面

<code>self.navigationController.interactivePopGestureRecognizer.enabled = YES;</code>

都寫在 B 裡面，是不是優雅了許多