情景: 一级页面不显示导航栏 ，二级页面显示导航栏.
方法一 适用于push/pop：
一级页面中
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:animated];
}- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
方法二（都适用）：
设置self为导航控制器的代理,实现代理方法,在将要显示控制器中设置导航栏隐藏和显示,使用这种方式不仅完美切合滑动返回手势,同时也解决了切换tabBar的时候,导航栏动态隐藏的问题.
@interface HomePageController ()
@end
@implementation HomePageController
#pragmamark - lifeCycle
- (void)viewDidLoad {
[super viewDidLoad];
// 设置导航控制器的代理为
selfself.navigationController.delegate= self;
}#pragmamark - UINavigationControllerDelegate// 将要显示控制器- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
// 判断要显示的控制器是否是自己BOOL isShowHomePage = [viewController isKindOfClass:[selfclass]];
[self.navigationController setNavigationBarHidden:isShowHomePage animated:YES];
}
写个基类viewcontroller，只要在基类viewcontroller中：
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:self.navigationHidden animated:animated];
}
