以往我們隱藏導航欄都是這樣做：
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
-(void)viewWillDisappear:(BOOL)animated{
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
複製程式碼但是往往這樣 會遇到一些奇怪的 bug ，想來想去 我想到這樣做可能要更好一點:
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController.view sendSubviewToBack:self.navigationController.navigationBar];
}
-(void)viewWillDisappear:(BOOL)animated{
[super viewWillDisappear:animated];
[self.navigationController.view bringSubviewToFront:self.navigationController.navigationBar];
}
複製程式碼