iOSNavigationBarHidden

iOS导航栏隐藏/显示，手势返回动画流畅

iOS隐藏导航栏

###解决方案 step1:通过运行时添加属性shouldNavigationBarHidden，标识控制器是否需要隐藏导航栏 step2:自定义导航栏，对比shouldNavigationBarHidden与导航栏navigationBarHidden，不一致时隐藏导航栏

###使用方法: 在ViewController的viewDidLoad中设置 self.shouldNavigationBarHidden 即可。 注意：push前设置view.backgroundColor 等view相关内容会导致viewDidLoad 提前的顺序问题

###代码

@interface UIViewController (NavigationBarHidden)
/// 是否隐藏导航栏。默认NO。
@property (nonatomic , assign) BOOL shouldNavigationBarHidden;

@end


@interface HideNavigationController : UINavigationController<UINavigationControllerDelegate>

@end

#import "UIViewController+NavigationBarHidden.h"
#import <objc/runtime.h>

@implementation UIViewController (NavigationBarHidden)

- (BOOL)shouldNavigationBarHidden{
    return [objc_getAssociatedObject(self, @selector(shouldNavigationBarHidden)) boolValue];
}

- (void)setShouldNavigationBarHidden:(BOOL)shouldNavigationBarHidden{
    objc_setAssociatedObject(self, @selector(shouldNavigationBarHidden), @(shouldNavigationBarHidden), OBJC_ASSOCIATION_ASSIGN);
}

@end





@implementation HideNavigationController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.delegate = self;
}

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
    
    if (self.viewControllers.count > 0) {
        viewController.hidesBottomBarWhenPushed = YES;
    }
    [super pushViewController:viewController animated:animated];
}

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
    
    if (viewController.shouldNavigationBarHidden != self.navigationBarHidden) {
        [self setNavigationBarHidden:viewController.shouldNavigationBarHidden animated:animated];
    }
}

@end

---

对于隐藏了导航栏的控制器，手势返回也消失了。可自定义手势，在边缘开始滑动时调用interactivePopGestureRecognizer方法。可参考 iOS导航栏隐藏透明处理 && 侧滑返回手势