iOS-隱藏Navigationbar【導航欄無縫圓滑的隱藏】

1.ViewController

.m

- (void)viewDidLoad {
    [super viewDidLoad];

    self.title = @"隱藏導航欄";
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.backgroundColor = [UIColor lightGrayColor];
    button.frame = CGRectMake(10, 100, 60, 30);
    [button addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    
    
    self.navigationController.delegate = self;
}
- (void)buttonClick{
    ///跳轉到KKViewController
    [self performSegueWithIdentifier:@"pusht" sender:nil];
}

頭部代理

@interface ViewController ()<UINavigationControllerDelegate>

代理方法

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
    
    [self.navigationController setNavigationBarHidden: [self hiddenBarVc: viewController] animated: animated];
}

- (BOOL)hiddenBarVc:(UIViewController *)viewController {
    
    BOOL needHideNaivgaionBar = NO;
    
    if ([viewController isKindOfClass: [KKViewController class]]) {
        needHideNaivgaionBar = YES;
    }
    
    return needHideNaivgaionBar;
}

2.KKViewController（目標ViewController）

新建一個KKViewController

.h

@property (nonatomic,strong) id popDelegate;

.m

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"第二個頁面";
    [self popSet];
}
- (void)popSet{
    _popDelegate = self.navigationController.interactivePopGestureRecognizer.delegate;
    SEL action = NSSelectorFromString(@"handleNavigationTransition:");
    UIPanGestureRecognizer *popPanGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self.popDelegate action:action];
    popPanGesture.maximumNumberOfTouches = 1;
    popPanGesture.delegate = self;
    [self.view addGestureRecognizer: popPanGesture];
}

頭部代理

@interface KKViewController ()<UIGestureRecognizerDelegate>

手勢代理方法

- (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer{
    
    ///【下麵兩個方法寫一個】
    ///全屏拖動
    CGPoint tragPoint = [gestureRecognizer translationInView:gestureRecognizer.view];
    if (tragPoint.x <= 0){
        return NO;
    }
    else{
        if (self.navigationController.viewControllers.count <= 1){
            return NO;
        }
        else{
            return YES;
        }
    }
    
    
//    ///局部允許拖動
//    CGPoint tragPoint = [gestureRecognizer locationInView:gestureRecognizer.view];
//    NSLog(@"x=%f;y=%f",tragPoint.x,tragPoint.y);
//    if (tragPoint.x > 60){///拖動的範圍
//        return NO;
//    }
//    else{
//        if (self.navigationController.viewControllers.count <= 1) {
//            return NO;
//        }
//        else{
//            return YES;
//        }
//    }
}

效果圖