如何隐藏导航栏而不会失去滑回功能

问题描述

我有一个UITableView，它有一个导航栏（来自UINavigationViewController），它可以通过用手指向后滑回来。

我试图隐藏导航栏但保持向后滑动的能力，代码：

   - （void）viewWillAppear：（BOOL）animated {
 [[self navigationController] setNavigationBarHidden：YES animated：YES]; 
} 
  

这成功隐藏了导航栏，但我无法再滑回最后一个屏幕。

有没有办法隐藏导航栏但保留回滑功能？

   - （void）viewWillAppear：（BOOL）animated {
 [super viewWillAppear：animated]; 
 //隐藏导航栏
 [[self navigationController] setNavigationBarHidden：YES animated：YES]; 
 
 //启用回滚
 if（[self.navigationController respondsToSelector：@selector（interactivePopGestureRecognizer）]）{
 self.navigationController.interactivePopGestureRecognizer.enabled = YES; 
 self.navigationController.interactivePopGestureRecognizer.delegate = self; 
} 
} 
 
 
  - （BOOL）gestureRecognizerShouldBegin：（UIGestureRecognizer *）gestureRecognizer {
返回YES; 
} 
  

在.h文件中，符合UIGestureRecognizerDelegate

I have a UITableView and it has a nav bar(got from UINavigationViewController), it's able to go back by sliding back using a finger.

I tried to hide the nav bar but keep the slide-back ability, code:

- (void)viewWillAppear:(BOOL)animated {
    [[self navigationController] setNavigationBarHidden:YES animated:YES];
}

This successfully hid the nav bar, however, I can no longer slide back to the last screen either.

Is there any way to hide the nav bar but keep the slide-back ability?

解决方案

Found the solution:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    // hide nav bar
    [[self navigationController] setNavigationBarHidden:YES animated:YES];

    // enable slide-back
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
        self.navigationController.interactivePopGestureRecognizer.delegate = self;
    }
}


- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    return YES;
}

And in .h file, conform to UIGestureRecognizerDelegate

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