导航栏显示和隐藏

#import "INTextViewController.h"

@interface INTextViewController ()<UIGestureRecognizerDelegate>

@end

@implementation INTextViewController

- (void)viewDidLoad{
    [super viewDidLoad];
    //因为你覆盖了系统的返回按钮，（董铂然博客园原创）系统将会通过代理禁用这个滑动返回功能，你提前把代理给踢了，这样滑动返回功能就能报住了。
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.delegate = nil;
    }
}

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    // 进入这个控制器时隐藏导航栏
    [self.navigationController setNavigationBarHidden:YES animated:animated];
}

- (void)viewWillDisappear:(BOOL)animated{
    // 显示导航栏 
    [self.navigationController setNavigationBarHidden:NO animated:animated];
}

@end

!原文链接